Ritual is a vitamin subscription service. It sells products with simple, traceable ingredients, including this multivitamin designed for women ages 18 and over. Each serving contains 50 mcg (2,000 IU) ...

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 ...

Breastfed infants and children with certain medical conditions are also susceptible to vitamin D deficiency. If a healthcare professional has recommended a vitamin D supplement for calcium absorption, ...

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 the ...

People age 50 and older taking 2,000 IU (International Units) of vitamin D3 for over five years had a 22% lower relative rate of confirmed autoimmune diagnoses, said study author Dr. Karen Costenbader ...

Vitamin D supplements could help protect the caps on our chromosomes that slow ageing, sparking hopes the sunshine vitamin might keep us healthier for longer, a recent study suggests. The researchers ...

How much vitamin D can boost memory, learning and decision-making in older adults, and how much is too much? A unique study found that overweight and obese older women who took more than three times ...