Collagen Peptides (Hydrolyzed, Types I & III)
Hydrolyzed collagen — also called collagen peptides or collagen hydrolysate — derived from bovine hide, porcine, marine (fish skin/scale), or eggshell-membrane sources and enzymatically broken into small, orally absorbable peptides. It is one of the more consistently positive supplement categories in dermatology and sports-medicine trials, primarily studied as Type I collagen (skin, bone, tendon) and Type III collagen (skin, blood vessels).
Mechanism of Action
After ingestion, collagen peptides are absorbed intact as specific di- and tripeptides — notably prolyl-hydroxyproline (Pro-Hyp) and hydroxyprolyl-glycine (Hyp-Gly) — that circulate in blood and reach skin, cartilage, and bone tissue. There, rather than being incorporated wholesale as structural collagen, they act as signaling peptides that stimulate fibroblast and chondrocyte activity, increasing the body's own synthesis of collagen, elastin, and hyaluronic acid.
Dosing Protocol
10g
Standard starting dose based on research
Therapeutic Range
2.5
Minimum
15
Maximum
Once daily, any time of day; often paired with vitamin C, which is a required cofactor for the body's own collagen synthesis
Cycling Protocol
No cycling required; benefit is typically assessed after 8–12 weeks of continuous daily use, consistent with trial durations
Dosages are general guidelines. Individual requirements vary based on body weight, health status, and specific goals. Start with lower doses and adjust based on response.
Benefits
Primary Benefits
- Improves skin hydration, elasticity, and wrinkle depth: a 2025 systematic review and meta-analysis of 23 randomized controlled trials (1,474 participants) found consistent benefit for skin hydration and elasticity
- Reduces knee osteoarthritis pain: a meta-analysis of randomized controlled trials (4 trials, 507 patients) found a significant reduction in pain versus placebo (standardized mean difference -0.58; moderate-quality evidence)
- Increases skin collagen density and reduces visible wrinkles over 60–90 days of use across multiple placebo-controlled trials
Secondary Benefits
Safety Information
Contraindications
Do not use if any of the following apply:
- •Known allergy to the source protein (bovine, porcine, marine, or egg, depending on the product)
- •No specific contraindication for general use; individuals on a protein-restricted renal diet should account for the added protein and amino acid load
Drug/Supplement Interactions
May interact with the following. Consult a healthcare provider before combining:
Potential Side Effects
Some users may experience:
This is not a complete list of interactions or side effects. Individual responses vary. Always start with the lowest effective dose and monitor your response. Report any adverse effects to your healthcare provider.
Quality Markers
Look for these specific quality indicators when sourcing this compound:
- Hydrolyzed to a low molecular weight (typically 2–5 kDa) for oral bioavailability — check that the product specifies hydrolysis and molecular weight
- Look for named, clinically studied ingredient forms (e.g., Verisol, Peptan, Naticol) that map to the specific dosing used in published trials
- Third-party testing for heavy metals, particularly for bovine-hide-sourced collagen
Trusted Certifications
Note: Supplement quality varies dramatically between brands. Cheap supplements often contain fillers, incorrect doses, or contaminants. Investing in quality products from reputable manufacturers is essential for safety and efficacy.
Evidence Profile
Evidence Score
7/10
Moderate Evidence
Some clinical trials with positive results, emerging research
Evidence Scale
8-10
Strong
5-7
Moderate
1-4
Emerging
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