“…These two examples both indicate that a greater peptide sequence length increases the DPP-IV inhibitory activity.Therefore, medium length peptides are also a good resource for DPP-IV inhibitory peptides. Porcine skin gelatin hydrolysates (Huang, Hung, Jao, Tung, & Hsu, 2014) and salmon skin gelatin hydrolysates (Hsieh, Wang, Hung, Chen, & Hsu, 2015) have been proven to inhibit plasma DPP-IV in rats. Hyp-containing peptides were detected in human plasma after the ingestion of a collagen hydrolysate and exerted beneficial effects on human health (Shigemura, Kubomura, Sato, & Sato, 2014).…”