Collagen peptides
supplementPerformance / joints & skin
Research status · Dietary supplement
Dietary supplement.
Hydrolyzed collagen commonly tracked for joint comfort, skin, and connective-tissue support, often taken with vitamin C. Evidence is moderate for joint comfort and skin hydration; it is not a complete protein for muscle purposes.
How it works
Provides glycine/proline-rich peptides used in connective-tissue synthesis; often paired with vitamin C, a collagen-synthesis cofactor.
Commonly discussed use cases
- Joint comfort (discussed)
- Skin/hair/nails (discussed)
- Tendon loading blocks (discussed)
Supposed / potential benefits
- Reported joint-comfort and skin-hydration benefits in some trials
Common side effects
- Mild GI upset in some
Warnings & contraindications
- Doesn't replace complete protein sources for muscle — track it separately from your protein target
Typical timing considerations
Any time; some take it before tendon-loading exercise with vitamin C.
Administration route
Oral (powder)
Questions to ask your clinician
- Is there evidence for my specific joint issue?
Commonly tracked in Reta
Tracking fields organize user-entered, clinician-directed routines — Reta never recommends or computes doses.
Track this in Reta
Beta members get a ready-made tracker for Collagen peptides — schedule, dose log, reminders, and check-ins — for organizing a clinician-directed routine. Personal tracking is available to everyone during the Public Beta.
Reta is a tracking and education tool — not a medical provider. Nothing here is a diagnosis, treatment, prescription, or dosing recommendation. Peptides and medications should only be used under the direction of a licensed clinician. Talk to a qualified clinician before starting, stopping, combining, or changing anything. Many compounds below are not FDA-approved for human use; some are investigational or sold through unregulated channels where purity and dosing are not guaranteed.