{"title":"Performance \u0026 Recovery","description":"\u003cp\u003eMaximize your training and recovery with clinically dosed performance supplements. Each formula is third-party tested and designed by physicians to support muscle growth, endurance, and post-workout repair.\u003csup\u003e\u003ca href=\"#fda-disclaimer\" class=\"fda-cite\" aria-label=\"See FDA disclaimer\"\u003e‡\u003c\/a\u003e\u003c\/sup\u003e\u003c\/p\u003e","products":[{"product_id":"creatine","title":"Creatine","description":"\u003cstyle\u003e\n    details.pdp-details summary { list-style: none; }\n    details.pdp-details summary::-webkit-details-marker { display: none; }\n    details.pdp-details summary .chevron { transition: transform 0.2s ease; }\n    details.pdp-details[open] summary .chevron { transform: rotate(180deg); }\n\n    .pdp-coa-pill:hover {\n      background: #1a1a1a !important;\n      color: #ffffff !important;\n    }\n\n    .pdp-stat-icon { line-height: 0; }\n    .pdp-stat-icon svg { display: block; }\n  \u003c\/style\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eSupports Brain Energy\u003csup\u003e\u003ca aria-label=\"See FDA disclaimer\" class=\"fda-cite\" href=\"#fda-disclaimer\"\u003e‡\u003c\/a\u003e\u003c\/sup\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-cps-sub=\"$0.30\/day\" data-cps-otp=\"$0.33\/day\" class=\"marek-cps\"\u003e$0.30\/day\u003c\/span\u003e \u003cspan style=\"color: #666;\"\u003e· 90-day supply\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003ePure, micronized Creatine Monohydrate providing 5 grams \u003cmeta charset=\"UTF-8\"\u003eper serving to support brain energy, muscle performance, strength, and recovery.\u003csup\u003e\u003ca aria-label=\"See FDA disclaimer\" class=\"fda-cite\" href=\"#fda-disclaimer\"\u003e‡\u003c\/a\u003e\u003c\/sup\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eCreatine helps replenish the body’s phosphocreatine reserves — a rapid energy system used by muscles and the brain during periods of high demand.\u003csup\u003e\u003ca aria-label=\"See FDA disclaimer\" class=\"fda-cite\" href=\"#fda-disclaimer\"\u003e‡\u003c\/a\u003e\u003c\/sup\u003e By supporting cellular energy availability, creatine helps fuel short, intense efforts, cognitive performance, and daily physical output.\u003csup\u003e\u003ca aria-label=\"See FDA disclaimer\" class=\"fda-cite\" href=\"#fda-disclaimer\"\u003e‡\u003c\/a\u003e\u003c\/sup\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eA clean, unflavored powder tested for \u003ca href=\"https:\/\/www.marekhealth.com\/coa\/creatine_26011418.html\" title=\"Certificate of Analysis\" target=\"_blank\"\u003epurity, potency, and contaminants\u003c\/a\u003e. Built for daily foundational support.\u003c\/p\u003e\n\u003cp\u003eMicronized for superior mixability.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: space-between; align-items: center; padding: 14px 0; border-bottom: 1px  solid #e5e5e5; margin: 12px 0 0;\"\u003e\n\u003cstrong\u003ePer Serving\u003c\/strong\u003e \u003cspan\u003e5g Creatine Monohydrate \u003cspan style=\"color: #666; font-weight: 400;\"\u003e(micronized)\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdetails style=\"margin: 0;\" class=\"pdp-details\"\u003e\n\u003csummary style=\"font-weight: 600; padding: 14px 0; cursor: pointer; border-bottom: 1px solid  #e5e5e5; display: flex; justify-content: space-between; align-items: center;\"\u003e\u003cspan\u003eHow to Take\u003c\/span\u003e \u003csvg style=\"display: block;\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"2\" stroke=\"#1a1a1a\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\" class=\"chevron\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 0;\"\u003e\n\u003cp\u003eMix 1 scoop (5g) into water once daily, or as recommended by your healthcare professional.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin: 0 0 12px 0;\" class=\"pdp-details\"\u003e\n\u003csummary style=\"font-weight: 600; padding: 14px 0; cursor: pointer; border-bottom: 1px solid  #e5e5e5; display: flex; justify-content: space-between; align-items: center;\"\u003e\u003cspan\u003eThe Science\u003c\/span\u003e \u003csvg style=\"display: block;\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"2\" stroke=\"#1a1a1a\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\" class=\"chevron\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 0;\"\u003e\n\u003cp class=\"p1\"\u003eCreatine is one of the most researched nutritional compounds in sports performance and human physiology. It supports the body’s phosphocreatine system, which helps rapidly regenerate ATP — the primary energy currency used by cells during high-demand states.\u003csup\u003e\u003ca aria-label=\"See FDA disclaimer\" class=\"fda-cite\" href=\"#fda-disclaimer\"\u003e‡\u003c\/a\u003e\u003c\/sup\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003e\n\u003cb style=\"font-size: 0.875rem;\"\u003eCreatine and cognitive performance in healthy individuals: systematic review of RCTs\u003cbr\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eReviews randomized controlled trials evaluating creatine and cognitive performance in healthy people.\u003cbr\u003e\u003ca href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/29704637\/\" title=\"Effects of creatine supplementation on cognitive function of healthy individuals: A systematic review of randomized controlled trials\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003ePMID: 29704637\u003c\/strong\u003e\u003c\/a\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\n\u003cspan class=\"s1\"\u003e\u003cb\u003eCreatine supplementation and cognitive function: systematic review and meta-analysis\u003c\/b\u003e\u003c\/span\u003e\u003cbr\u003eReviews evidence on creatine’s role in cognitive outcomes in adults.\u003cbr\u003e\u003ca href=\"https:\/\/doi.org\/10.3389\/fnut.2024.1424972\" title=\"The effects of creatine supplementation on cognitive function in adults: a systematic review and meta-analysis\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan class=\"s1\"\u003e\u003cb\u003ePMID: 39070254\u003c\/b\u003e\u003c\/span\u003e\u003c\/a\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\n\u003cb style=\"font-size: 0.875rem;\"\u003eCreatine, cerebral energy metabolism, and sleep deprivation\u003cbr\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eHuman study evaluating creatine’s effects on cognitive performance and cerebral high-energy phosphates during sleep deprivation.\u003cbr\u003e\u003c\/span\u003e\u003ca href=\"https:\/\/doi.org\/10.1038\/s41598-024-54249-9\" title=\"Single dose creatine improves cognitive performance and induces changes in cerebral high energy phosphates during sleep deprivation\" rel=\"noopener\" target=\"_blank\"\u003e\u003cb style=\"font-size: 0.875rem;\"\u003ePMID: 38418482\u003c\/b\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli class=\"p1\"\u003e\n\u003cb style=\"font-size: 0.875rem;\"\u003eISSN position stand on creatine safety and efficacy\u003cbr\u003e\u003c\/b\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eBroad evidence review supporting creatine monohydrate for exercise performance, recovery, and safety when used appropriately.\u003cbr\u003e\u003c\/span\u003e\u003ca href=\"https:\/\/doi.org\/10.1186\/s12970-017-0173-z\" title=\"International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine\" rel=\"noopener\" target=\"_blank\"\u003e\u003cb style=\"font-size: 0.875rem;\"\u003ePMID: 28615996\u003c\/b\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cp style=\"margin: 20px 0 16px 0;\"\u003e\u003ca style=\"display: inline-flex; align-items: center; gap: 8px; padding: 12px  26px; border-radius: 999px; background: transparent; background-image: none; color: #1a1a1a; text-decoration: none; fo  nt-weight: 600; font-size: 14px; letter-spacing: 0.02em; border: 1.5px solid  #1a1a1a; line-height: 1; transition: background 0.2s ease, color 0.2s ease;\" rel=\"noopener\" href=\"https:\/\/www.marekhealth.com\/coa\/creatine_26011418.html\" class=\"pdp-coa-pill\" target=\"_blank\"\u003eView Certificate of Analysis (COA) →\u003c\/a\u003e\u003c\/p\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit,minmax(130px,1fr)); gap: 12px; margin: 20px 0;\"\u003e\n\u003ca style=\"display: block; text-decoration: none; color: inherit; cursor: pointer;\" aria-label=\"View Certificate of Analysis\" rel=\"noopener\" href=\"https:\/\/www.marekhealth.com\/coa\/creatine_26011418.html\" class=\"pdp-stat-card-link\" target=\"_blank\"\u003e\n\u003cdiv style=\"padding: 16px 10px; border: 1px solid #e5e5e5; border-radius: 10px; text-align: center; background: #f  fffff; display: flex; flex-direction: column; align-items: center; gap: 10px;\"\u003e\n\u003cdiv style=\"width: 36px; height: 36px; border-radius: 50%; background: #1a1a1a; color: #ff  ffff; display: flex; align-items: center; justify-content: center;\" class=\"pdp-stat-icon\"\u003e\u003csvg style=\"display: block; fill: #ffffff;\" fill=\"#ffffff\" viewbox=\"0 0 24 24\" height=\"18\" width=\"18\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M9 3 H15 V5 H14 V8 L18.5 18 A1.5 1.5 0 0 1 17 21 H7 A1.5 1.5 0\n  0 1 5.5 18 L10 8 V5 H9 Z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: bold; letter-spacing: 0.04em; text-transform: uppercase; color: #1a1a1a; line-height: 1.2;\"\u003e3rd-Party Tested\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\n\u003cdiv style=\"padding: 16px 10px; border: 1px solid #e5e5e5; border-radius: 10px; text-align: center; background: #f  fffff; display: flex; flex-direction: column; align-items: center; gap: 10px;\"\u003e\n\u003cdiv style=\"width: 36px; height: 36px; border-radius: 50%; background: #1a1a1a; color: #ff  ffff; display: flex; align-items: center; justify-content: center;\" class=\"pdp-stat-icon\"\u003e\u003csvg style=\"display: block; fill: #ffffff;\" fill=\"#ffffff\" viewbox=\"0 0 24 24\" height=\"18\" width=\"18\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M10 3 H14 A1 1 0 0 1 15 4 V9 H20 A1 1 0 0 1 21 10 V14 A1 1 0 0\n  1 20 15 H15 V20 A1 1 0 0 1 14 21 H10 A1 1 0 0 1 9 20 V15 H4 A1 1 0 0 1 3 14 V10 A1 1 0 0 1 4 9 H9 V4 A1 1 0\n   0 1 10 3 Z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: bold; letter-spacing: 0.04em; text-transform: uppercase; color: #1a1a1a; line-height: 1.2;\"\u003ePhysician Formulated\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 16px 10px; border: 1px solid #e5e5e5; border-radius: 10px; text-align: center; background: #f  fffff; display: flex; flex-direction: column; align-items: center; gap: 10px;\"\u003e\n\u003cdiv style=\"width: 36px; height: 36px; border-radius: 50%; background: #1a1a1a; color: #ff  ffff; display: flex; align-items: center; justify-content: center;\" class=\"pdp-stat-icon\"\u003e\u003csvg style=\"display: block;\" viewbox=\"0 0 24 24\" height=\"18\" width=\"18\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cg fill=\"#ffffff\"\u003e\u003crect height=\"17\" width=\"1.5\" y=\"4\" x=\"11.25\"\u003e\u003c\/rect\u003e\u003cpath d=\"M11.5 9 Q7\n  8.5 6 5 Q10.5 5.5 11.5 9 Z\"\u003e\u003c\/path\u003e\u003cpath d=\"M12.5 9 Q17 8.5 18 5 Q13.5 5.5 12.5 9 Z\"\u003e\u003c\/path\u003e\u003cpath d=\"M11.5 14 Q7 13.5 6\n   10 Q10.5 10.5 11.5 14 Z\"\u003e\u003c\/path\u003e\u003cpath d=\"M12.5 14 Q17 13.5 18 10 Q13.5 10.5 12.5 14 Z\"\u003e\u003c\/path\u003e\u003c\/g\u003e\u003cline stroke-linecap=\"round\" stroke-width=\"2.5\" stroke=\"#1a1a1a\" y2=\"20\" x2=\"20\" y1=\"4\" x1=\"4\"\u003e\u003c\/line\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: bold; letter-spacing: 0.04em; text-transform: uppercase; color: #1a1a1a; line-height: 1.2;\"\u003eGluten-Free\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 16px 10px; border: 1px solid #e5e5e5; border-radius: 10px; text-align: center; background: #f  fffff; display: flex; flex-direction: column; align-items: center; gap: 10px;\"\u003e\n\u003cdiv style=\"width: 36px; height: 36px; border-radius: 50%; background: #1a1a1a; color: #ff  ffff; display: flex; align-items: center; justify-content: center;\" class=\"pdp-stat-icon\"\u003e\u003csvg style=\"display: block; fill: #ffffff;\" fill=\"#ffffff\" viewbox=\"0 0 24 24\" height=\"18\" width=\"18\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpolygon points=\"12 2 14.6 9.5 22 9.5 16 14.2 18.2 21.5 12 17 5.8 21.5 8\n   14.2 2 9.5 9.4 9.5\"\u003e\u003c\/polygon\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: bold; letter-spacing: 0.04em; text-transform: uppercase; color: #1a1a1a; line-height: 1.2;\"\u003eMade in USA\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size: 12px; color: #666; text-align: center; margin: -4px 0 16px;\"\u003eManufactured and quality-tested in the USA with globally sourced ingredients.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eSold by weight, not volume. Some settling may occur during shipping \u0026amp; handling.\u003c\/em\u003e\u003c\/p\u003e","brand":"Marek Supplements","offers":[{"title":"Default Title","offer_id":43810288336938,"sku":"MHS-11","price":30.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0681\/9997\/2906\/files\/creatine.webp?v=1776381736"},{"product_id":"glycine","title":"Glycine","description":"\u003cstyle\u003e\n    details.pdp-details summary { list-style: none; }\n    details.pdp-details summary::-webkit-details-marker { display: none; }\n    details.pdp-details summary .chevron { transition: transform 0.2s ease; }\n    details.pdp-details[open] summary .chevron { transform: rotate(180deg); }\n\n    .pdp-coa-pill:hover {\n      background: #1a1a1a !important;\n      color: #ffffff !important;\n    }\n\n    .pdp-stat-icon { line-height: 0; }\n    .pdp-stat-icon svg { display: block; }\n  \u003c\/style\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eSupports Relaxation\u003csup\u003e\u003ca href=\"#fda-disclaimer\" class=\"fda-cite\" aria-label=\"See FDA disclaimer\"\u003e‡\u003c\/a\u003e\u003c\/sup\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"marek-cps\" data-cps-otp=\"$0.33\/day\" data-cps-sub=\"$0.30\/day\"\u003e$0.30\/day\u003c\/span\u003e \u003cspan style=\"color: #666;\"\u003e· 90-day supply\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003ePure Glycine Powder providing 5 grams per serving to support relaxation, restful sleep, and glutathione production.\u003csup\u003e\u003ca aria-label=\"See FDA disclaimer\" class=\"fda-cite\" href=\"#fda-disclaimer\"\u003e‡\u003c\/a\u003e\u003c\/sup\u003e\u003c\/p\u003e\n\u003cp\u003eGlycine is a naturally sweet amino acid that helps support healthy thermoregulation, an important part of the body’s natural sleep-onset process.\u003csup\u003e\u003ca aria-label=\"See FDA disclaimer\" class=\"fda-cite\" href=\"#fda-disclaimer\"\u003e‡\u003c\/a\u003e\u003c\/sup\u003e Glycine also serves as a building block for glutathione, the body’s primary endogenous antioxidant.\u003csup\u003e\u003ca aria-label=\"See FDA disclaimer\" class=\"fda-cite\" href=\"#fda-disclaimer\"\u003e‡\u003c\/a\u003e\u003c\/sup\u003e\u003c\/p\u003e\n\u003cp\u003eA clean, naturally sweet-tasting powder tested for \u003ca rel=\"noopener\" title=\"Certificate of Analysis\" href=\"https:\/\/www.marekhealth.com\/coa\/glycine_26011419.html\" target=\"_blank\"\u003epurity, potency, and contaminants\u003c\/a\u003e. Built for daily foundational support. Mix into water, tea, or your preferred evening beverage.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: space-between; align-items: center; padding: 14px 0; border-bottom: 1px  solid #e5e5e5; margin: 12px 0 0;\"\u003e\n\u003cstrong\u003ePer Serving\u003c\/strong\u003e \u003cspan\u003e5g L-Glycine\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdetails class=\"pdp-details\" style=\"margin: 0;\"\u003e\n\u003csummary style=\"font-weight: 600; padding: 14px 0; cursor: pointer; border-bottom: 1px solid  #e5e5e5; display: flex; justify-content: space-between; align-items: center;\"\u003e\u003cspan\u003eHow to Take\u003c\/span\u003e \u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"chevron\" width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#1a1a1a\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"display: block;\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 0;\"\u003e\n\u003cp\u003eMix 1 scoop (5g) into water or chamomile tea once daily at bedtime, or as recommended by your healthcare professional.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"pdp-details\" style=\"margin: 0 0 12px 0;\"\u003e\n\u003csummary style=\"font-weight: 600; padding: 14px 0; cursor: pointer; border-bottom: 1px solid  #e5e5e5; display: flex; justify-content: space-between; align-items: center;\"\u003e\u003cspan\u003eThe Science\u003c\/span\u003e \u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"chevron\" width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#1a1a1a\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"display: block;\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 0;\"\u003e\n\u003cp\u003eResearch suggests glycine may support sleep quality in part by helping the body’s natural thermoregulatory processes before sleep, while also serving as a building block for glutathione, the body’s primary endogenous antioxidant.\u003csup\u003e\u003ca aria-label=\"See FDA disclaimer\" class=\"fda-cite\" href=\"#fda-disclaimer\"\u003e‡\u003c\/a\u003e\u003c\/sup\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlycine and subjective sleep quality\u003c\/strong\u003e\u003cbr\u003eHuman study evaluating glycine ingestion before bedtime and subjective sleep quality in volunteers with sleep concerns.\u003cbr\u003e\u003ca href=\"https:\/\/doi.org\/10.1111\/j.1479-8425.2007.00262.x\" title=\"Glycine ingestion improves subjective sleep quality in human volunteers, correlating with polysomnographic changes\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003eDOI: 10.1111\/j.1479-8425.2007.00262.x\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlycine and daytime performance after restricted sleep\u003c\/strong\u003e\u003cbr\u003eHuman study evaluating glycine’s effects on subjective sleepiness, fatigue, and performance after sleep restriction.\u003cbr\u003e\u003ca href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC3328957\/\" title=\"The Effects of Glycine on Subjective Daytime Performance in Partially Sleep-Restricted Healthy Volunteers\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003ePMID: 22529837\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlycine, thermoregulation, and sleep physiology\u003c\/strong\u003e\u003cbr\u003eMechanistic study evaluating glycine’s sleep-promoting and hypothermic effects through thermoregulatory pathways.\u003cbr\u003e\u003ca href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC4397399\/\" title=\"The Sleep-Promoting and Hypothermic Effects of Glycine are Mediated by NMDA Receptors in the Suprachiasmatic Nucleus\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003ePMID: 25533534\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlycine and glutathione synthesis\u003c\/strong\u003e\u003cbr\u003eReview discussing glycine’s role as a substrate for glutathione synthesis and antioxidant support.\u003cbr\u003e\u003ca href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC5855430\/\" title=\"Dietary Glycine Is Rate-Limiting for Glutathione Synthesis and May Have Broad Potential for Health Protection\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003ePMID: 29559876\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cp style=\"margin: 20px 0 16px 0;\"\u003e\u003ca class=\"pdp-coa-pill\" href=\"https:\/\/www.marekhealth.com\/coa\/glycine_26011419.html\" rel=\"noopener\" style=\"display: inline-flex; align-items: center; gap: 8px; padding: 12px  26px; border-radius: 999px; background: transparent; background-image: none; color: #1a1a1a; text-decoration: none; fo  nt-weight: 600; font-size: 14px; letter-spacing: 0.02em; border: 1.5px solid  #1a1a1a; line-height: 1; transition: background 0.2s ease, color 0.2s ease;\" target=\"_blank\"\u003eView Certificate of Analysis (COA) →\u003c\/a\u003e\u003c\/p\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit,minmax(130px,1fr)); gap: 12px; margin: 20px 0;\"\u003e\n\u003ca style=\"display: block; text-decoration: none; color: inherit; cursor: pointer;\" aria-label=\"View Certificate of Analysis\" rel=\"noopener\" href=\"https:\/\/www.marekhealth.com\/coa\/glycine_26011419.html\" class=\"pdp-stat-card-link\" target=\"_blank\"\u003e\n\u003cdiv style=\"padding: 16px 10px; border: 1px solid #e5e5e5; border-radius: 10px; text-align: center; background: #f  fffff; display: flex; flex-direction: column; align-items: center; gap: 10px;\"\u003e\n\u003cdiv class=\"pdp-stat-icon\" style=\"width: 36px; height: 36px; border-radius: 50%; background: #1a1a1a; color: #ff  ffff; display: flex; align-items: center; justify-content: center;\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"#ffffff\" style=\"display: block; fill: #ffffff;\"\u003e\u003cpath d=\"M9 3 H15 V5 H14 V8 L18.5 18 A1.5 1.5 0 0 1 17 21 H7 A1.5 1.5 0\n  0 1 5.5 18 L10 8 V5 H9 Z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: bold; letter-spacing: 0.04em; text-transform: uppercase; color: #1a1a1a; line-height: 1.2;\"\u003e3rd-Party Tested\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\n\u003cdiv style=\"padding: 16px 10px; border: 1px solid #e5e5e5; border-radius: 10px; text-align: center; background: #f  fffff; display: flex; flex-direction: column; align-items: center; gap: 10px;\"\u003e\n\u003cdiv class=\"pdp-stat-icon\" style=\"width: 36px; height: 36px; border-radius: 50%; background: #1a1a1a; color: #ff  ffff; display: flex; align-items: center; justify-content: center;\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"#ffffff\" style=\"display: block; fill: #ffffff;\"\u003e\u003cpath d=\"M10 3 H14 A1 1 0 0 1 15 4 V9 H20 A1 1 0 0 1 21 10 V14 A1 1 0 0\n  1 20 15 H15 V20 A1 1 0 0 1 14 21 H10 A1 1 0 0 1 9 20 V15 H4 A1 1 0 0 1 3 14 V10 A1 1 0 0 1 4 9 H9 V4 A1 1 0\n   0 1 10 3 Z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: bold; letter-spacing: 0.04em; text-transform: uppercase; color: #1a1a1a; line-height: 1.2;\"\u003ePhysician Formulated\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 16px 10px; border: 1px solid #e5e5e5; border-radius: 10px; text-align: center; background: #f  fffff; display: flex; flex-direction: column; align-items: center; gap: 10px;\"\u003e\n\u003cdiv class=\"pdp-stat-icon\" style=\"width: 36px; height: 36px; border-radius: 50%; background: #1a1a1a; color: #ff  ffff; display: flex; align-items: center; justify-content: center;\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" style=\"display: block;\"\u003e\u003cg fill=\"#ffffff\"\u003e\u003crect x=\"11.25\" y=\"4\" width=\"1.5\" height=\"17\"\u003e\u003c\/rect\u003e\u003cpath d=\"M11.5 9 Q7\n  8.5 6 5 Q10.5 5.5 11.5 9 Z\"\u003e\u003c\/path\u003e\u003cpath d=\"M12.5 9 Q17 8.5 18 5 Q13.5 5.5 12.5 9 Z\"\u003e\u003c\/path\u003e\u003cpath d=\"M11.5 14 Q7 13.5 6\n   10 Q10.5 10.5 11.5 14 Z\"\u003e\u003c\/path\u003e\u003cpath d=\"M12.5 14 Q17 13.5 18 10 Q13.5 10.5 12.5 14 Z\"\u003e\u003c\/path\u003e\u003c\/g\u003e\u003cline x1=\"4\" y1=\"4\" x2=\"20\" y2=\"20\" stroke=\"#1a1a1a\" stroke-width=\"2.5\" stroke-linecap=\"round\"\u003e\u003c\/line\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: bold; letter-spacing: 0.04em; text-transform: uppercase; color: #1a1a1a; line-height: 1.2;\"\u003eGluten-Free\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"padding: 16px 10px; border: 1px solid #e5e5e5; border-radius: 10px; text-align: center; background: #f  fffff; display: flex; flex-direction: column; align-items: center; gap: 10px;\"\u003e\n\u003cdiv class=\"pdp-stat-icon\" style=\"width: 36px; height: 36px; border-radius: 50%; background: #1a1a1a; color: #ff  ffff; display: flex; align-items: center; justify-content: center;\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"18\" height=\"18\" viewbox=\"0 0 24 24\" fill=\"#ffffff\" style=\"display: block; fill: #ffffff;\"\u003e\u003cpolygon points=\"12 2 14.6 9.5 22 9.5 16 14.2 18.2 21.5 12 17 5.8 21.5 8\n   14.2 2 9.5 9.4 9.5\"\u003e\u003c\/polygon\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-size: 11px; font-weight: bold; letter-spacing: 0.04em; text-transform: uppercase; color: #1a1a1a; line-height: 1.2;\"\u003eMade in USA\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size: 12px; color: #666; text-align: center; margin: -4px 0 16px;\"\u003eManufactured and quality-tested in the USA with globally sourced ingredients.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eSold by weight, not volume. Some settling may occur during shipping \u0026amp; handling.\u003c\/em\u003e\u003c\/p\u003e","brand":"Marek Supplements","offers":[{"title":"Default Title","offer_id":43810294136874,"sku":"MHS-12","price":30.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0681\/9997\/2906\/files\/glycine.webp?v=1776381775"},{"product_id":"glutamine","title":"Glutamine","description":"\u003cstyle\u003e\n    details.pdp-details summary { list-style: none; }\n    details.pdp-details summary::-webkit-details-marker { display: none; }\n    details.pdp-details summary .chevron { transition: transform 0.2s ease; }\n    details.pdp-details[open] summary .chevron { transform: rotate(180deg); }\n\n    .pdp-coa-pill:hover {\n      background: #1a1a1a !important;\n      color: #ffffff !important;\n    }\n\n    .pdp-stat-icon { line-height: 0; }\n    .pdp-stat-icon svg { display: block; }\n  \u003c\/style\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eSupports Digestive \u0026amp; Immune Health\u003csup\u003e\u003ca aria-label=\"See FDA disclaimer\" class=\"fda-cite\" href=\"#fda-disclaimer\"\u003e‡\u003c\/a\u003e\u003c\/sup\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-cps-sub=\"$0.30\/day\" data-cps-otp=\"$0.33\/day\" class=\"marek-cps\"\u003e$0.30\/day\u003c\/span\u003e \u003cspan style=\"color: #666;\"\u003e· 90-day supply\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003ePure L-Glutamine powder providing 5 grams per serving to support digestive health, gut lining integrity, and immune-cell energy metabolism.\u003csup\u003e\u003ca href=\"#fda-disclaimer\" class=\"fda-cite\" aria-label=\"See FDA disclaimer\"\u003e‡\u003c\/a\u003e\u003c\/sup\u003e\u003cbr\u003e\u003cbr\u003eGlutamine is a key fuel source for intestinal cells, helping support the structure and function of the gut lining.\u003csup\u003e\u003ca href=\"#fda-disclaimer\" class=\"fda-cite\" aria-label=\"See FDA disclaimer\"\u003e‡\u003c\/a\u003e\u003c\/sup\u003e A healthy gut lining supports digestive resilience and balanced immune function. Immune cells also rely on glutamine for energy, especially during periods of increased metabolic demand.\u003csup\u003e\u003ca href=\"#fda-disclaimer\" class=\"fda-cite\" aria-label=\"See FDA disclaimer\"\u003e‡\u003c\/a\u003e\u003c\/sup\u003e\u003c\/p\u003e\n\u003cp\u003eA clean, unflavored powder tested for \u003ca rel=\"noopener\" title=\"Certificate of Analysis\" href=\"https:\/\/www.marekhealth.com\/coa\/glutamine_26011420.html\" target=\"_blank\"\u003epurity, potency, and contaminants\u003c\/a\u003e. Built for daily foundational support.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: space-between; align-items: center; padding: 14px 0; border-bottom: 1px  solid #e5e5e5; margin: 12px 0 0;\"\u003e\n\u003cstrong\u003ePer Serving\u003c\/strong\u003e \u003cspan\u003e5g L-Glutamine\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdetails style=\"margin: 0 0 12px 0;\" class=\"pdp-details\"\u003e\n\u003csummary style=\"font-weight: 600; padding: 14px 0; cursor: pointer; border-bottom: 1px solid  #e5e5e5; display: flex; justify-content: space-between; align-items: center;\"\u003e\u003cspan\u003eHow to Take\u003c\/span\u003e \u003csvg style=\"display: block;\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"2\" stroke=\"#1a1a1a\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\" class=\"chevron\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 0;\"\u003e\n\u003cp\u003eMix 1 scoop (5g) into water once daily each morning, or as recommended by your healthcare professional.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin: 0 0 12px 0;\" class=\"pdp-details\"\u003e\n\u003csummary style=\"font-weight: 600; padding: 14px 0; cursor: pointer; border-bottom: 1px solid  #e5e5e5; display: flex; justify-content: space-between; align-items: center;\"\u003e\u003cspan\u003eThe Science\u003c\/span\u003e \u003csvg style=\"display: block;\" stroke-linejoin=\"round\" stroke-linecap=\"round\" stroke-width=\"2\" stroke=\"#1a1a1a\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\" class=\"chevron\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 0;\"\u003e\n\u003cp\u003eGlutamine is the most abundant amino acid in the body and plays an important role in digestive and immune health. It serves as a key fuel source for intestinal cells and immune cells, helping support gut lining integrity, digestive function, and immune-cell energy metabolism.\u003csup\u003e\u003ca href=\"#fda-disclaimer\" class=\"fda-cite\" aria-label=\"See FDA disclaimer\"\u003e‡\u003c\/a\u003e\u003c\/sup\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlutamine metabolism and immune function\u003c\/strong\u003e\u003cbr\u003eReviews glutamine’s role in immune-cell metabolism, intestinal function, and increased-demand states.\u003cbr\u003e\u003ca href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC6266414\/\" title=\"Glutamine: Metabolism and Immune Function, Supplementation and Clinical Translation\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003ePMID: 30360490\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlutamine and intestinal barrier function\u003c\/strong\u003e\u003cbr\u003eReviews glutamine’s role as a fuel source for intestinal cells and its involvement in maintaining gut barrier structure and function.\u003cbr\u003e\u003ca href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC4369670\/\" title=\"Role of Glutamine in Protection of Intestinal Epithelial Tight Junctions\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003ePMID: 25810794\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlutamine and intestinal physiology\u003c\/strong\u003e\u003cbr\u003eReviews glutamine’s role in enterocyte function, tight junction regulation, and intestinal stress response pathways.\u003cbr\u003e\u003ca href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC5454963\/\" title=\"The Roles of Glutamine in the Intestine and Its Implication in Intestinal Diseases\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003ePMID: 28498331\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlutamine supplementation and exercise-related gut stress\u003c\/strong\u003e\u003cbr\u003eHuman study evaluating oral glutamine supplementation and markers of intestinal permeability after high-intensity endurance exercise.\u003cbr\u003e\u003ca href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC3921361\/\" title=\"Effects of oral glutamine supplementation on exercise-induced gastrointestinal permeability and tight junction protein expression\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003ePMID: 24285149\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cp style=\"margin: 20px 0 16px 0;\"\u003e\u003ca style=\"display: inline-flex; align-items: center; gap: 8px; padding: 12px  26px; border-radius: 999px; background: transparent; background-image: none; color: #1a1a1a; text-decoration: none; fo  nt-weight: 600; font-size: 14px; letter-spacing: 0.02em; border: 1.5px solid  #1a1a1a; line-height: 1; transition: background 0.2s ease, color 0.2s ease;\" rel=\"noopener\" href=\"https:\/\/www.marekhealth.com\/coa\/glutamine_26011420.html\" class=\"pdp-coa-pill\" target=\"_blank\"\u003eView Certificate of Analysis (COA) →\u003c\/a\u003e\u003c\/p\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit,minmax(130px,1fr)); gap: 12px; margin: 20px 0;\"\u003e\n\u003ca class=\"pdp-stat-card-link\" href=\"https:\/\/www.marekhealth.com\/coa\/glutamine_26011420.html\" target=\"_blank\" rel=\"noopener\" aria-label=\"View Certificate of Analysis\" style=\"display:block;text-decoration:none;color:inherit;cursor:pointer;\"\u003e\u003cdiv style=\"padding: 16px 10px; border: 1px solid #e5e5e5; border-radius: 10px; 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