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 ...

We’ve been using NUSAVA Organic Vitamin D3 K2 Drops for a few weeks now and have noticed a significant improvement in our overall health. The liquid supplement ... With 2,000 IU of certified ...