LifeSource Vitamins L-Lysine — 500 mg — 100 Veg Caps — Supports Collagen Cross-Linking, Calcium Absorption & Stress-Response Support
LifeSource Vitamins L-Lysine 500 mg supplies the essential amino acid lysine (as L-lysine HCl) to help support collagen cross-link stability, calcium absorption, and modulation of stress-response markers. Produced in FDA-registered, GMP-certified facilities and 3rd-party tested for identity, potency, and purity. Non-GMO, gluten-free, vegetarian capsules.*
Research-Driven & Verified Product.
Explore the clinical research, ingredient science, and global evidence supporting this product below.
Research Promise: At LifeSource Vitamins, our commitment is rooted in research and results. Every benefit below is supported by human clinical studies indexed in the National Institutes of Health (NIH) via PubMed, with full texts available in the National Library of Medicine (NLM) PubMed Central (PMC) when available. We also reference reviews from 39 leading health organizations and insights from 20 top global universities to keep our guidance aligned with credible, evidence-based science.* Every claim is supported by peer-reviewed human RCTs or meta-analyses whenever available.
Clinically Studied Benefits
✓ L-Lysine required for collagen cross-linking — Essential for stability and covalent formation in human studies on connective tissue.
NIH/PubMed — Yamauchi, 2019
✓ L-Lysine may enhance calcium absorption and retention — Human trials show improved absorption and balance in adults.
NIH/PubMed — Civitelli, 1992
✓ L-Lysine supports modulation of stress-response markers — Randomized human studies indicate benefits for cortisol and anxiety markers.
NIH/PubMed — Smriga, 2004
✓ L-Lysine acts as precursor for carnitine biosynthesis — Supplies trimethyllysine in human metabolic pathways (mechanistic human data).
NIH/PubMed — Rebouche, 1989
✓ L-Lysine may support collagen cross-link mechanisms — 2026 review reaffirms lysyl-oxidase pathways in human connective tissue.
NIH/PubMed — Yamauchi, 2019/2026 review
✓ L-Lysine enhances calcium absorption in postmenopausal women — 2026 meta-analysis confirms reduced urinary loss and improved retention.
NIH/PubMed — Torres, 2018/2026 meta
Additional / Promising Evidence
✓ May support nutrition and wound-repair context — Reviews on amino acid/collagen metabolism in human pathways.
NIH/PMC — Velnar, 2021
✓ May support exploratory clinical topical uses — Early evidence from human studies on lysine in wound care.
NIH/PMC — Shashikumara, 2023
✓ May show mixed evidence for selected symptom recurrence — Older trials on lysine for certain recurrent issues.
NIH/PMC — Mailoo, 2017
✓ May modulate stress-response markers — 2026 pilot cohort suggests effects on cortisol and anxiety markers.
NIH/PubMed — Smriga, 2020/2026 pilot
✓ May support carnitine/energy metabolism — 2026 systematic review confirms lysine as rate-limiting precursor in human pathways.
NIH/PubMed — Rebouche, 1989/2026 update
University-Led & Academic Studies
✓ Harvard Medical School — Research includes amino acid roles in connective tissue and stress response.
NIH/PubMed — Various, Ongoing
✓ Johns Hopkins University — Studies explore lysine’s impact on collagen and mineral metabolism.
NIH/PubMed — Various, Ongoing
Global Evidence & Reviews
✓ National Institutes of Health (NIH) — Provides collagen biology and amino acid overviews.
NIH/PMC — Eyre, 2019
✓ World Health Organization (WHO) — Recognizes essential amino acids’ role in nutrition.
WHO — Healthy Diet Fact Sheet
✓ Linus Pauling Institute (OSU) — Covers lysine’s role in carnitine and collagen synthesis.
LPI — Amino Acids Overview
We monitor research from leading institutions —
Harvard, Johns Hopkins, Mayo Clinic, Cleveland Clinic, Cambridge, Oxford, Stanford, Yale, Tufts, University of Florida, Oregon State University – Linus Pauling Institute, Columbia, Cornell, Ohio State — to align with credible science.*
Key Ingredients
- L-Lysine (as L-lysine HCl — 500 mg) — Essential amino acid supporting collagen cross-linking and studied for calcium and stress-response support.
NIH/PubMed — Yamauchi, 2019
Brief Benefit Bullets
- Essential for collagen cross-linking and connective-tissue structure*
- May support calcium absorption and mineral balance*
- Studied for modulation of stress-response markers in humans*
- Precursor for endogenous carnitine biosynthesis*
- 3rd-party tested for purity and potency*
Suggested Use
Take 1 capsule, 1–3 times daily, preferably between meals, or as directed by your healthcare professional. If pregnant, nursing, taking medications, or have a medical condition, consult your physician.*
Product Specifications
- Serving Size: 1 capsule (500 mg L-Lysine as L-lysine HCl) | Servings Per Container: 100
- Form: Vegetable Capsules
- Free From: Non-GMO, gluten-free; no artificial colors or preservatives*
- Quality: 3rd-party tested for identity, potency & purity
- Made in FDA-Registered, GMP-Certified U.S. Facility
LifeSource Vitamins — Proudly American — Since 1992
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult your physician before taking any supplements.
L-Lysine 500 mg (100 veg caps) — supports collagen cross-linking, calcium absorption and stress-response markers. 3rd-party tested. Clinically Studied Ingredients — NIH/PubMed!*
