B12 supplements can come in a variety of forms — spray, liquid, capsule — which can make it difficult to know what to buy.

Generally, taking your vitamin B12 consistently is most important, but there is a time of day you might want to prioritize ...

1000 IU (25 mcg) per day increases vitamin D blood levels 10 ng/ml (25 nmol/L). 2000 IU (50 mcg) per day increases vitamin D blood levels 20 ng/ml (50 nmol/L). If the vitamin D blood test was 30 ...

Several studies have shown that vegetarian diets may be low in vitamin B-12, vitamin D ... in the absence of adequate exposure to sunlight, 5 mcg/day or 200 IU in the form of cholecalciferol ...