Function?

Vitamin B7 is involved in the metabolism of fats, carbohydrates, and proteins. It acts as a coenzyme, assisting enzymes in breaking down these nutrients from food and converting them into forms the body can use for energy. Biotin promotes a healthy hair coat, skin, and nails by maintaining the strength and integrity of the tissues. Other functions include supporting cell growth and repair throughout the body and gene regulation.

Whole food sources?

Free-range chicken and turkey, fish, and grass-fed beef.