Examine Database: Collagen Content
| Intervention | Grade | Effect | Detail |
|---|---|---|---|
| Vitamin A | C | ||
| Vitamin D | D | ||
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Research FeedRead all studies
The role of molecular weight and hydroxyproline in collagen supplements
In this randomized controlled trial, a collagen supplement enriched in hydroxyproline peptides and with a low average molecular weight increased collagen content in the skin of participants more than standard hydrolyzed collagen.
Examine Database References
- Vitamin D - McAlindon T, LaValley M, Schneider E, Nuite M, Lee JY, Price LL, Lo G, Dawson-Hughes BEffect of vitamin D supplementation on progression of knee pain and cartilage volume loss in patients with symptomatic osteoarthritis: a randomized controlled trialJAMA.(2013 Jan 9)
- Vitamin A - Kafi R, Kwak HS, Schumacher WE, Cho S, Hanft VN, Hamilton TA, King AL, Neal JD, Varani J, Fisher GJ, Voorhees JJ, Kang SImprovement of naturally aged skin with vitamin A (retinol)Arch Dermatol.(2007 May)