Collagen can react with acidic polysaccharides and tannins, which decrease sensory quality of the products, and therefore, high polyphenolic content foods are not suitable for production of functional food with hydrolyzed collagen. In food legislations, there is no restriction for the amount of collagen usage in foods. However, 2 to 30% hydrolyzed collagen addition to liquid foods is proposed in view of its positive effects. In addition, a hydrolyzed collagen concentration higher than 30% can cause a viscosity increase in beverages which in turn can have an important effect on the processing line and product quality (Takemori, Yasuda, Mitsui, & Shimizu, 2007).