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.
Niacin, Vitamin B3, is a water soluble vitamin that is well regulated by the body, thus overdose is rare, and only occurs when niacin is taken in the form of supplements. An overdose of niacin is seen in the form of skin rashes (flush), dry skin, various digestive maladies. A long term overdose can lead to liver damage, elevated blood sugar levels and type II diabetes, as well as increased risk of birth defects. The current DV for Niacin (Vitamin B3) is 20mg.