Cities in ZIP code 38138. The cities below are at least partially located in ZIP code 38138. In addition to the primary city for a ZIP code, USPS also publishes a list of other acceptable cities that can be used with ZIP code 38138. However, if you are mailing something to ZIP code 38138, you should not use any of the cities listed as unacceptable. Choose from the primary or acceptable cities when mailing your package or letter. Primary city: Germantown, TN Acceptable: Memphis Unacceptable:
View full size image. Vitamin B3, also called niacin, is one of the eight B-complex water-soluble vitamins. Niacin has a wide range of uses in the body, helping functions in the digestive system, skin and nervous system.iew full size image. Vitamin B3, also called niacin, is one of the eight B-complex water-soluble vitamins. Niacin has a wide range of uses in the body, helping functions in the digestive system, skin and nervous system.
Vitamin B3 (Niacin, Niacinamide): Vitamin B3 occurs in two forms, niacin and niacinamide. Niacin is often used to lower blood pressure because it dilates blood vessel. It is also helpful for lowering the level of cholesterol in the blood.itamin B3 (Niacin, Niacinamide): Vitamin B3 occurs in two forms, niacin and niacinamide. Niacin is often used to lower blood pressure because it dilates blood vessel. It is also helpful for lowering the level of cholesterol in the blood.