Meat
Chicken, pork, and beef are good sources of collagen, especially in connective tissue-rich areas like pot roasts, briskets, and chuck steaks. Organ meat such as heart, liver, tripe, and kidney has1.5 to 3 times more collagen than muscle meats, making it an ideal choice to increase collagen intake. According to research by National Chung-Hsing University in Taiwan, chicken feet is also a natural food option for a collagen diet. It consists of skin, bones, tendons, and cartilages, where abundant collagen exists. Fish and shellfish are high in collagen peptides as long as you eat with the skin-on. It is said that people can absorb marine collagen easier than regular collagen.
