1, foods containing vitamin B, such as whole grains, liver, lean meat, beans and fresh fruits and vegetables.

2. Foods containing fatty acids, such as fish.

3. Choline-containing foods, such as eggs, wheat germ, beans, oatmeal and brown rice.

4. Foods containing cyclohexanol, such as lecithin, rice bran, whole wheat and beans.

5. Foods containing p-aminobenzoic acid, such as mushrooms, cabbage, sunflower seeds, oats, spinach, etc.