Cite journal Last name Iwai First name K. Last name 2 Hasegawa, T. Last name 3 Taguchi, Y. Last name 4 Morimatsu, F. Last name 5 Sato, K. Last name 6 Nakamura, Y. Last name 7 Higashi, A. Last name 8 Kido, Y. Last name 9 Nakabo, Y. Year of publication 2005 Title Identification of food-derived collagen peptides in human blood after oral ingestion of gelatine hydrolysates Journal Journal of Agricultural and Food Chemistry Volume 53 Issue 16 Pages 6531–6536 DOI 10.1021/jf050206p PMID 16076145 ↑ Matsuda, N.; Koyama, Y.; Hosaka, Y.; Ueda, H.; Watanabe, T.; Araya, T.; Irie, S.; Takehana, K (2006). "Effects of ingestion of collagen peptide on collagen fibrils and glycosaminoglycans in the dermis". Journal of Nutritional Science and Vitaminology.