Should I Take Vitamin D Every Day?

Current guidelines say adults shouldn't take more than the equivalent of 100 micrograms a day. But vitamin D is a 'fat-soluble' vitamin, so your body can store it for months and you don't need it every day. That means you could equally safely take a supplement of 20 micrograms a day or 500 micrograms once a month.

Is it better to take vitamin D daily or weekly?

Daily vitamin D was more effective than weekly, and monthly administration was the least effective.

Is taking vitamin D daily harmful?

Taking 60,000 international units (IU) a day of vitamin D for several months has been shown to cause toxicity. This level is many times higher than the U.S. Recommended Dietary Allowance (RDA) for most adults of 600 IU of vitamin D a day.

James H. Sterling

James H. Sterling

Environmental Science & Climate Journalist

James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.