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 ...

D3. However, there are notable differences ... amount of vitamin D with these yummy gummies. They have 800 IU of the vitamin to promote healthy bones, teeth and brain and support immune function.

The recommended dietary allowance, or RDA, for vitamin D is 600 IU or 15 mcg for children and young adults. After age 70, the RDA increases to 800 IU or 20 mcg per day. Other experts suggest we need ...