Gelatin vs Undenatured Type II Collagen
How gelatin and undenatured type II collagen differ in potency, absorption, tolerance, and cost.
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Side by Side
| Gelatin | Undenatured Type II Collagen (UC-II) | |
|---|---|---|
| Absorption | High | Variable |
| How it is absorbed | Partly hydrolyzed collagen that gels in cold water; digested to the same amino acids and peptides as collagen peptides. | Not a protein source. At milligram doses it is proposed to act through oral tolerance in gut lymphoid tissue, damping immune activity against joint cartilage. |
| Typical dose | 10-15 g daily | 40 mg daily |
| Common uses | tendon and ligament support (small trials) | knee osteoarthritis |
| Side effects | None notable. | None notable. |
| Cost | Low | Moderate |
| Also called | gelatine | UC-II, native type II collagen |
When to Choose Gelatin
Choose gelatin when cost matters and you can take it as food. The cheapest collagen source per gram. The tendon collagen synthesis study used 15 g gelatin with vitamin C before exercise.
Gelatin
The same protein for less money, in a form that sets.
What to look for: Unflavored gelatin, 10-15 g, with a vitamin C source if you are copying the tendon study.
Find on iHerb Affiliate linkWhen to Choose Undenatured Type II Collagen (UC-II)
Choose undenatured type II collagen when joint symptoms are the goal and you want a small capsule. Mechanism and dose are unrelated to hydrolyzed collagen. Trials were sponsored by the ingredient's maker.
Undenatured Type II Collagen (UC-II)
A different mechanism at a tiny dose, with one sizable industry-funded knee trial.
What to look for: UC-II at 40 mg daily. Not a protein supplement.
Find on iHerb Affiliate linkProducts on Titrate
2,296 of the 214,745 labels in the NIH Dietary Supplement Label Database list collagen as an active ingredient (1,410 on market). 1,243 are sold as collagen products by name.
Collagen does not have its own search category yet. Each product above links to its full label in the NIH database.
Related
References
Iwai K, Hasegawa T, Taguchi Y, et al. Identification of food-derived collagen peptides in human blood after oral ingestion of gelatin hydrolysates. J Agric Food Chem. 2005;53(16):6531-6536.
Clark KL, Sebastianelli W, Flechsenhar KR, et al. 24-Week study on the use of collagen hydrolysate as a dietary supplement in athletes with activity-related joint pain. Curr Med Res Opin. 2008;24(5):1485-1496.
Proksch E, Segger D, Degwert J, Schunck M, Zague V, Oesser S. Oral supplementation of specific collagen peptides has beneficial effects on human skin physiology: a double-blind, placebo-controlled study. Skin Pharmacol Physiol. 2014;27(1):47-55.
Lugo JP, Saiyed ZM, Lane NE. Efficacy and tolerability of an undenatured type II collagen supplement in modulating knee osteoarthritis symptoms: a multicenter randomized, double-blind, placebo-controlled study. Nutr J. 2016;15:14.
Shaw G, Lee-Barthel A, Ross ML, Wang B, Baar K. Vitamin C-enriched gelatin supplementation before intermittent activity augments collagen synthesis. Am J Clin Nutr. 2017;105(1):136-143.
Paul C, Leser S, Oesser S. Significant amounts of functional collagen peptides can be incorporated in the diet while maintaining indispensable amino acid balance. Nutrients. 2019;11(5):1079.
Oikawa SY, Kamal MJ, Webb EK, McGlory C, Baker SK, Phillips SM. Whey protein but not collagen peptides stimulate acute and longer-term muscle protein synthesis with and without resistance exercise in healthy older women: a randomized controlled trial. Am J Clin Nutr. 2020;111(3):708-718.
de Miranda RB, Weimer P, Rossi RC. Effects of hydrolyzed collagen supplementation on skin aging: a systematic review and meta-analysis. Int J Dermatol. 2021;60(12):1449-1461.