Helps the body regulate appetite and digestion keeps your nervous system healthy found in pork fish poultry whole grains nuts?

The correct answer is: Vitamin B6.

Vitamin B6 is a water-soluble vitamin that plays an important role in many bodily functions, including regulating appetite and digestion, and keeping the nervous system healthy. Vitamin B6 is found in a variety of foods, including pork, fish, poultry, whole grains, and nuts.