{"product_id":"l-cysteine-hcl-anhydrous","title":"L-Cysteine HCl Anhydrous","description":"\u003cdiv class=\"flex h-svh w-screen flex-col\"\u003e\n\u003cdiv class=\"relative z-0 flex min-h-0 w-full flex-1\"\u003e\n\u003cdiv class=\"relative flex min-h-0 w-full flex-1\"\u003e\n\u003cdiv class=\"@container\/main relative flex min-w-0 flex-1 flex-col -translate-y-[calc(env(safe-area-inset-bottom,0px)\/2)] pt-[calc(env(safe-area-inset-bottom,0px)\/2)]\"\u003e\n\u003cdiv data-scroll-root=\"\" class=\"@w-sm\/main:[scrollbar-gutter:stable_both-edges] touch:[scrollbar-width:none] relative flex min-h-0 min-w-0 flex-1 flex-col [scrollbar-gutter:stable] not-print:overflow-x-clip not-print:overflow-y-auto scroll-pt-(--header-height) [--sticky-padding-top:var(--header-height)] has-data-[fixed-header=less-than-xl]:@w-xl\/main:scroll-pt-0 has-data-[fixed-header=less-than-xl]:@w-xl\/main:[--sticky-padding-top:0px] has-data-[fixed-header=less-than-xxl]:@w-2xl\/main:scroll-pt-0 has-data-[fixed-header=less-than-xxl]:@w-2xl\/main:[--sticky-padding-top:0px]\"\u003e\u003cmain class=\"min-h-0 flex-1\" id=\"main\"\u003e\n\u003cdiv id=\"thread\" class=\"group\/thread flex flex-col min-h-full\"\u003e\n\u003cdiv role=\"presentation\" class=\"composer-parent flex flex-1 flex-col focus-visible:outline-0\"\u003e\n\u003cdiv class=\"relative basis-auto flex-col -mb-(--composer-overlap-px) [--composer-overlap-px:28px] grow flex\"\u003e\n\u003cdiv class=\"flex flex-col text-sm pb-25\" data-pb-monitored=\"true\"\u003e\n\u003carticle class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto [content-visibility:auto] supports-[content-visibility:auto]:[contain-intrinsic-size:auto_100lvh] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"099dcad9-67d1-4b63-8e97-7f6f6b625155\" data-testid=\"conversation-turn-2\" data-scroll-anchor=\"true\" data-turn=\"assistant\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] @w-sm\/main:[--thread-content-margin:--spacing(6)] @w-lg\/main:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"4ac004ee-d416-42d8-a7dc-720f25f2b9ce\" dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-2\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full wrap-break-word light markdown-new-styling\"\u003e\n\u003cp data-start=\"42\" data-end=\"650\"\u003e\u003cstrong data-start=\"42\" data-end=\"70\"\u003eL-Cysteine HCl Anhydrous\u003c\/strong\u003e is a stabilized, highly bioavailable form of the sulfur-containing amino acid L-cysteine. Presented as the hydrochloride (HCl) salt without water (anhydrous), it offers excellent purity, solubility, and shelf stability—qualities that make it popular in dietary supplements, functional foods, and clinical nutrition formulas. L-cysteine is considered a \u003cem data-start=\"423\" data-end=\"448\"\u003econditionally essential\u003c\/em\u003e amino acid, meaning the body can synthesize it under normal conditions, but supplemental intake becomes valuable during periods of stress, illness, detoxification demand, or inadequate dietary protein.\u003c\/p\u003e\n\u003ch3 data-start=\"652\" data-end=\"669\"\u003eDescription\u003c\/h3\u003e\n\u003cp data-start=\"670\" data-end=\"1235\"\u003eL-cysteine plays a pivotal biochemical role as a precursor to \u003cstrong data-start=\"732\" data-end=\"747\"\u003eglutathione\u003c\/strong\u003e, one of the body’s most important endogenous antioxidants. Glutathione supports cellular defense against oxidative stress, assists liver detoxification pathways, and helps maintain immune balance. The HCl anhydrous form improves absorption and handling characteristics compared to free L-cysteine, making it easier to formulate and more consistent in potency. Once ingested, L-cysteine contributes sulfur groups necessary for protein structure, enzyme activity, and metabolic regulation.\u003c\/p\u003e\n\u003ch3 data-start=\"1237\" data-end=\"1251\"\u003eBenefits\u003c\/h3\u003e\n\u003cp data-start=\"1252\" data-end=\"1496\"\u003e\u003cstrong data-start=\"1252\" data-end=\"1292\"\u003e1. Antioxidant \u0026amp; Cellular Protection\u003c\/strong\u003e\u003cbr data-start=\"1292\" data-end=\"1295\"\u003eBy supporting glutathione synthesis, L-cysteine helps neutralize free radicals, protect cell membranes, and reduce oxidative damage linked to aging, environmental toxins, and intense physical activity.\u003c\/p\u003e\n\u003cp data-start=\"1498\" data-end=\"1788\"\u003e\u003cstrong data-start=\"1498\" data-end=\"1533\"\u003e2. Liver Detoxification Support\u003c\/strong\u003e\u003cbr data-start=\"1533\" data-end=\"1536\"\u003eL-cysteine is widely recognized for its role in hepatic detox pathways. It supports the liver’s ability to conjugate and eliminate toxins, heavy metals, and metabolic waste products, making it valuable during detox programs or high toxic load exposure.\u003c\/p\u003e\n\u003cp data-start=\"1790\" data-end=\"2053\"\u003e\u003cstrong data-start=\"1790\" data-end=\"1818\"\u003e3. Immune System Support\u003c\/strong\u003e\u003cbr data-start=\"1818\" data-end=\"1821\"\u003eAdequate glutathione levels are essential for proper immune cell signaling and response. Supplementing with L-cysteine may help maintain immune resilience, particularly during periods of stress, overtraining, or seasonal challenges.\u003c\/p\u003e\n\u003cp data-start=\"2055\" data-end=\"2282\"\u003e\u003cstrong data-start=\"2055\" data-end=\"2086\"\u003e4. Skin, Hair \u0026amp; Nail Health\u003c\/strong\u003e\u003cbr data-start=\"2086\" data-end=\"2089\"\u003eAs a sulfur-rich amino acid, L-cysteine contributes to keratin production—the structural protein that makes up hair, skin, and nails. This supports strength, elasticity, and overall appearance.\u003c\/p\u003e\n\u003cp data-start=\"2284\" data-end=\"2547\"\u003e\u003cstrong data-start=\"2284\" data-end=\"2322\"\u003e5. Respiratory \u0026amp; Mucolytic Support\u003c\/strong\u003e\u003cbr data-start=\"2322\" data-end=\"2325\"\u003eL-cysteine is known for its ability to break disulfide bonds in mucus, which can help thin secretions and support respiratory comfort. This property has made cysteine derivatives popular in respiratory health formulations.\u003c\/p\u003e\n\u003cp data-start=\"2549\" data-end=\"2792\"\u003e\u003cstrong data-start=\"2549\" data-end=\"2593\"\u003e6. Athletic Recovery \u0026amp; Metabolic Support\u003c\/strong\u003e\u003cbr data-start=\"2593\" data-end=\"2596\"\u003eBy helping manage oxidative stress and supporting protein synthesis, L-cysteine may aid post-exercise recovery and overall metabolic efficiency, especially in high-intensity or endurance athletes.\u003c\/p\u003e\n\u003ch3 data-start=\"2794\" data-end=\"2812\"\u003eDosage \u0026amp; Use\u003c\/h3\u003e\n\u003cp data-start=\"2813\" data-end=\"2971\"\u003eTypical supplemental dosages of \u003cstrong data-start=\"2845\" data-end=\"2873\"\u003eL-Cysteine HCl Anhydrous\u003c\/strong\u003e range from \u003cstrong data-start=\"2885\" data-end=\"2915\"\u003e250 mg to 1,000 mg per day\u003c\/strong\u003e, depending on individual needs and formulation goals.\u003c\/p\u003e\n\u003cul data-start=\"2972\" data-end=\"3101\"\u003e\n\u003cli data-start=\"2972\" data-end=\"3014\"\u003e\n\u003cp data-start=\"2974\" data-end=\"3014\"\u003e\u003cstrong data-start=\"2974\" data-end=\"2995\"\u003eGeneral wellness:\u003c\/strong\u003e 250–500 mg daily\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3015\" data-end=\"3101\"\u003e\n\u003cp data-start=\"3017\" data-end=\"3101\"\u003e\u003cstrong data-start=\"3017\" data-end=\"3050\"\u003eAntioxidant or liver support:\u003c\/strong\u003e 500–1,000 mg daily, often divided into two doses\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3103\" data-end=\"3303\"\u003eIt is commonly taken on an empty stomach or between meals for optimal absorption and may be combined with supportive nutrients such as vitamin C, selenium, or glycine to enhance glutathione synthesis.\u003c\/p\u003e\n\u003ch3 data-start=\"3305\" data-end=\"3334\"\u003eSafety \u0026amp; Considerations\u003c\/h3\u003e\n\u003cp data-start=\"3335\" data-end=\"3637\"\u003eL-cysteine is generally well tolerated when used within recommended ranges. Individuals with medical conditions, those taking prescription medications, or pregnant or nursing women should consult a healthcare professional before use. As with all amino acids, balance within the total diet is important.\u003c\/p\u003e\n\u003cp data-start=\"3639\" data-end=\"3903\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"3639\" data-end=\"3653\"\u003eIn summary\u003c\/strong\u003e, L-Cysteine HCl Anhydrous is a versatile, science-backed amino acid ingredient valued for its antioxidant support, detoxification benefits, and role in structural and immune health—making it a cornerstone compound in modern nutritional formulations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/main\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Jarvis Nutrition","offers":[{"title":"$69.00","offer_id":44045222510675,"sku":null,"price":69.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0685\/8355\/5155\/files\/Yographtext-2026-02-08T202024.831.png?v=1770610846","url":"https:\/\/jarvisnutrition.com\/products\/l-cysteine-hcl-anhydrous","provider":"Jarvis Nutrition","version":"1.0","type":"link"}