The table below shows the prices for letters over 1 ounce (round up the weight, e.g. if it is 2.1 ounces, use 3 ounce price). If your letter is more than 3.5 ounces, OR is larger than the maximum size of a regular envelope (11 1/2 x 6 1/8), then you would use large envelope pricing.
Overview. Vitamin B12, also called cobalamin, is one of 8 B vitamins. All B vitamins help the body convert food (carbohydrates) into fuel (glucose), which is used to produce energy.These B vitamins, often referred to as B complex vitamins, also help the body use fats and protein.B complex vitamins are needed for healthy skin, hair, eyes, and liver.ll B vitamins are water soluble, meaning that the body does not store them. Vitamin B12 is an especially important vitamin for maintaining healthy nerve cells, and it helps in the production of DNA and RNA, the body's genetic material.
Metabolism. Vitamin B-12 plays a role in metabolism, along with the other B vitamins. The vitamin helps your body convert food to energy, breaking carbohydrates down into more simple sugars. B vitamins also help your body digest proteins and fats.