Effects of Different Vitamin C-Enriched Collagen Derivatives on Collagen Synthesis

Lis DM, Baar K · International Journal of Sport Nutrition and Exercise Metabolism

Serum PINP (collagen-synthesis marker) tended to rise ~20% after gelatin and hydrolyzed collagen but not after placebo or the gummy; large inter-individual variability kept the result short of statistical significance.

Population

Recreationally active young men, randomized double-blind crossover

Intervention

15 g vitamin C-enriched gelatin, hydrolyzed collagen, or a gelatin+collagen gummy, 1 h before 6 min of jump rope

Comparator

Placebo

Limitations

n=10; primary comparison not statistically significant; surrogate biomarker, not a clinical outcome; same group as the original Shaw protocol.