Historically, 400 IU (10 ug) of vitamin D was recommended for better health because it closely approximated the amount of vitamin D in a teaspoonful of cod liver oil. However, 800 to 1,000 IU is ...

Fact checked by Nick Blackmer With summer in full swing, you may be enjoying more vitamin D-producing sunlight than in the ...

A new study finds that safe levels of vitamin D supplementation can promote longevity by reducing a certain type of cellular ...

Vitamin D supplements helped slow telomere shortening in older adults, suggesting they may support cellular health and slow ...

In the United States, current guidelines suggest that consuming 400–800 International Units (IU), or 10–20 micrograms (mcg), of vitamin D should meet the needs of 97%–98% of all healthy people.

In a recent narrative review published in Nutrients, researchers discuss the evidence arguing for the efficiency and safety of 2000 international units (IU), i.e., 50 micrograms (µg) of vitamin D ...

The daily value (DV) for vitamin D is 600-800 IU (15-20 mcg) for adults over 19 years of age. The vitamin D content is listed as a percentage of the DV on the nutrition facts label on food packages.

If you’re on a high dose, the doctor will probably keep an eye on the level of vitamin D in your body by giving you blood tests. Most healthy people only need 400 to 800 IU of vitamin D a day ...

Most adults up to age 70 need no more than about 600 IU of vitamin D a day; older people, 800 IU. Avoid exceeding 4,000 IU daily unless your doctor has prescribed a higher dose to treat a deficiency.

the recommended dietary allowance of vitamin D is 600 IU per day for those between ages 1 and 70, and 800 IU for those over 70. Manson warns that there is danger in overdoing it on supplements or ...

The recommended dietary allowance (RDA) for vitamin D is 600 International Units from ages 1 to 70. Under age 1, the recommendation is 400 IU. People ages 70 or older have an RDA of at least 800 IU.

Vitamin D supplements slowed the shortening of telomeres, according to a study published in The American Journal of Clinical ...