Trust Signals
Which has better third-party testing, Sports Research or Vital Proteins?
Sports Research carries NSF Certified for Sport or Informed Sport certification on select products. Vital Proteins does not consistently carry equivalent third-party athletic certifications across its line, though Nestle quality systems apply after the 2019 acquisition.
Does collagen powder actually improve skin or joints?
Hydrolyzed collagen at 2.5 to 10 g per day has shown statistically significant improvements in skin elasticity and hydration in multiple RCTs, and modest joint pain reduction in athletes in a few controlled trials. Effect sizes are real but moderate. Gut-to-tissue translation is mechanistically supported but not fully proven.
What dose of collagen peptides do the clinical studies actually use?
Most positive skin RCTs used 2.5 g to 10 g per day. Joint and connective tissue studies, including Shaw et al. (2017) on collagen plus vitamin C peri-exercise, used 15 g. Both products provide 10 to 20 g per serving, which covers the range used in trials.
Is grass-fed collagen actually better than conventional?
There is no published RCT comparing grass-fed versus conventional bovine collagen peptides on human outcomes. The claim is a marketing differentiation. Amino acid profiles of hydrolyzed collagen are largely determined by hydrolysis conditions, not cattle diet.
Can I take collagen peptides with vitamin C?
Yes, and there is a mechanistic rationale for co-administration. Vitamin C is required as a cofactor for prolyl and lysyl hydroxylase, enzymes that stabilize the collagen triple helix. Shaw et al. (2017) showed enhanced collagen synthesis markers when collagen was taken with vitamin C before exercise.
Why does collagen powder clump or congeal?
Hydrolyzed collagen is hygroscopic and partially re-forms gel structures at lower temperatures and higher concentrations. Dissolution in warm liquid above 40 degrees Celsius reduces clumping. This is a physical property of the peptide chains, not a sign of degradation.
Does Vital Proteins contain vitamin C? Does Sports Research?
Vital Proteins original unflavored collagen does not contain added vitamin C. Some Vital Proteins Beauty Collagen SKUs include 80 mg vitamin C. Sports Research standard collagen does not include added vitamin C in most SKUs. Check the current label before purchase.
Which is cheaper per gram of collagen?
At typical retail pricing in early 2025, Sports Research is generally 10 to 20 percent less expensive per gram of collagen compared to Vital Proteins, though prices fluctuate. Both are substantially more expensive per gram than bulk unflavored collagen from commodity suppliers.
Is collagen a complete protein?
No. Collagen lacks tryptophan, which is an essential amino acid, making it an incomplete protein by standard definition. It should not replace whey, casein, or plant-based complete protein sources for overall protein needs.
How should collagen peptides be stored to avoid degradation?
Store sealed in a cool, dry location away from direct sunlight. Heat and moisture accelerate Maillard-type browning reactions between peptide amino groups and residual sugars, degrading flavor and potentially reducing peptide integrity. Refrigeration is not required but extends shelf life in humid climates.
Sources
- 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.
- Proksch E, Schunck M, Zague V, Segger D, Degwert J, Oesser S. "Oral intake of specific bioactive collagen peptides reduces skin wrinkles and increases dermal matrix synthesis." Skin Pharmacol Physiol. 2014;27(3):113-119.
- Asserin J, Lati E, Shioya T, Prawitt J. "The effect of oral collagen peptide supplementation on skin moisture and the dermal collagen network: evidence from an ex vivo model and randomized, placebo-controlled clinical trials." J Cosmet Dermatol. 2015;14(4):291-301.
- 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.
- 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.
- Shigemura Y, Iwai K, Morimatsu F, et al. "Effect of prolyl-hydroxyproline (Pro-Hyp), a food-derived collagen peptide in human blood, on growth of fibroblasts from mouse skin." J Agric Food Chem. 2009;57(2):444-449.
- Hexsel D, Zague V, Schunck M, Siega C, Camozzato FO, Oesser S. "Oral supplementation with specific bioactive collagen peptides improves nail growth and reduces symptoms of brittle nails." J Cosmet Dermatol. 2017;16(4):520-526.
- 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.
- Shoulders MD, Raines RT. "Collagen structure and stability." Annu Rev Biochem. 2009;78:929-958.
- Informed Sport Program. Informed Sport certification database. https://www.informed.sport (accessed 2025).
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Platform: This page is published by FormBlends for informational and educational purposes only. It does not constitute medical advice. Consult a qualified healthcare provider before beginning any supplement regimen.
From the FormBlends catalog
GHK-Cu (Copper Peptide)
A copper peptide studied for skin and tissue support · From $179/mo · compounded by a licensed 503A pharmacy, dispensed only after provider review.
View GHK-Cu (Copper Peptide) →Research Compound / Dietary Supplement: Hydrolyzed collagen products are sold as dietary supplements under FDA regulations (21 CFR Part 101). They are not drugs and are not intended to diagnose, treat, cure, or prevent any disease. Neither Sports Research nor Vital Proteins products are FDA-approved drugs.
Results: Individual results from collagen supplementation vary. Clinical studies cited used specific doses, populations, and durations that may not apply to every consumer. Effect sizes in published trials are moderate and not universal.
Trademark: Sports Research, Vital Proteins, NSF Certified for Sport, and Informed Sport are trademarks or registered trademarks of their respective owners. FormBlends has no affiliation with these brands. Mention is for comparative editorial purposes only.
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GHK-Cu (Copper Peptide)
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