References Bovine vs fish collagen

References:
  1. Proksch, E., Segger, D., Degwert, J., Schunck, M., Zague, V., & Oesser, S. (2014). Oral supplementation of specific collagen peptides has beneficial effects on human skin physiology: a double-blind, placebo-controlled study. Skin pharmacology and physiology, 27(1), 47-55.
  2. Han, C. J., & Kang, S. M. (2008). The Effect of collagen supplementation from pork skin on serum collagen, serum sex steroid hormone, serum lipid and skin crack in Korean middle-aged women. Korean Journal of Community Nutrition, 13(6), 912-921.
  3. Proksch, E., Schunck, M., Zague, V., Segger, D., Degwert, J., & Oesser, S. (2014). Oral intake of specific bioactive collagen peptides reduces skin wrinkles and increases dermal matrix synthesis. Skin pharmacology and physiology, 27(3), 113-119.
  4. Oesser, S., Adam, M., Babel, W., & Seifert, J. (1999). Oral administration of 14C labeled gelatin hydrolysate leads to an accumulation of radioactivity in cartilage of mice (C57/BL). The Journal of nutrition, 129(10), 1891-1895.
  5. Wu, J., Fujioka, M., Sugimoto, K., Mu, G., & Ishimi, Y. (2004). Assessment of effectiveness of oral administration of collagen peptide on bone metabolism in growing and mature rats. Journal of bone and mineral metabolism, 22(6), 547-553.
  6. Ashmarin, I. P. (2007). Glyprolines in regulatory tripeptides. Neurochemical Journal, 1(3), 173-175.
  7. Yamadera, W., Inagawa, K., Chiba, S., Bannai, M., Takahashi, M., & Nakayama, K. (2007). Glycine ingestion improves subjective sleep quality in human volunteers, correlating with polysomnographic changes. Sleep and Biological Rhythms, 5(2), 126-131.
  8. Inagawa, K., Hiraoka, T., Kohda, T., Yamadera, W., & Takahashi, M. (2006). Subjective effects of glycine ingestion before bedtime on sleep quality. Sleep and Biological Rhythms, 4(1), 75-77.
  9. Lee, S. K., Posthauer, M. E., Dorner, B., Redovian, V., & Maloney, M. J. (2006). Pressure ulcer healing with a concentrated, fortified, collagen protein hydrolysate supplement: a randomized controlled trial. Advances in skin & wound care, 19(2), 92-96.
  10. Oesser, S., Adam, M., Babel, W., & Seifert, J. (1999). Oral administration of 14C labeled gelatin hydrolysate leads to an accumulation of radioactivity in cartilage of mice (C57/BL). The Journal of nutrition, 129(10), 1891-1895.