The maximum dosage to take per day should be 4,000 units, says Dr. Peterson. But chat with your doctor at your annual physical after looking at your current vitamin D levels before adding this ...

but adults shouldn't consume vitamin D supplements at levels higher than 4,000 international units daily. The vitamin is best ...

with long-term intake exceeding 4000 units potentially being hazardous. Global vitamin D deficiency is linked to various diseases, such as heart disease, immune disorders, infections, and cancer.

The ideal range for vitamin D in healthy individuals is between 600 and 2,000 international units (IU) daily. The body is most efficient at making vitamin D at midday (12 noon) when the sun is ...