Function?

Vitamin B2 helps the conversion of carbohydrates, fats, and proteins from food into energy that the body can use. It plays a role in the production of adenosine triphosphate (ATP), the body's primary energy source. Vitamin B2 also supports the normal growth, development, and function of cells, maintaining healthy tissues and contributing to the body's growth processes. It also acts as an antioxidant.

Whole food sources?

Grass-fed liver, grass-fed beef, mackerel, and pasture-raised eggs.