The stomach is where protein begins to digest.  The stomach contains hydrochloric acid or HCL that breaks down food.  Herbs that are beneficial for the stomach include:

Nervous System

The nervous system contains the central nervous system, the brain and spinal cord, and the peripheral nervous system, the senses for the rest of the body.  Herbs that are beneficial for the nervous system include:

Vitamins and supplements that help the nervous system are: copper, fish oil, lecithin, magnesium, and vitamin B12.