Are there natural sources of biotin and collagen?

Biotin, also known as vitamin B7, is found in foods such as avocados, sweet potatoes, dairy products, nuts, seeds, egg yolks, mushrooms, beans, bananas or whole grains. Collagen is a bit trickier because there aren't clear food sources except maybe bone broth or gelatin. Other than collagen supplements, you can take a wide range of protein-rich foods e.g. dairy, eggs, meat or fish to get the amino acids needed for collagen production.