Vitamin D3 and B12 Together: Why the Pair Matters and How to Choose a Supplement
Vitamin D3 and vitamin B12 appear on almost every list of nutrients adults are told to watch. They do different jobs, but they are often sold, discussed and taken together. If you are comparing a D3 B12 supplement, this guide explains what each nutrient does and what to check on the label before you buy. What vitamin D3 does Vitamin D3 is often called the sunshine vitamin, because the skin makes it when exposed to sunlight. It plays a role in how the body handles calcium and supports normal muscle function. Food sources include egg yolks, fatty fish and fortified foods, but these rarely cover the whole day’s need for most people. Those who spend long hours indoors, work night shifts or cover most of their skin outdoors may get less sun than they think. What vitamin B12 does Vitamin B12 helps the body form red blood cells and supports a healthy nervous system. It also helps the body turn food into energy. B12 occurs naturally in dairy, eggs, fish and meat, so people who eat little o...