Function?

Vitamin B6 is involved in metabolizing proteins, carbohydrates, and fats, breaking down the nutrients from food into forms that the body can use for energy. It is also essential for producing neurotransmitters such as serotonin, dopamine, and gamma-aminobutyric acid (GABA), vital in mood regulation, sleep, and cognitive function. Vitamin B6 contributes to the production of hemoglobin, the protein in red blood cells that carries oxygen throughout the body and supports the immune system.

Whole food sources?

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