Due to our northern latitude and because the sun’s rays are weak in the fall and winter, talk to your doctor about whether taking 1000 international units (IU) a day during fall and winter months is right for you.
Babies who are exclusively breast-fed may be at risk of vitamin D deficiency, which is why experts recommend they be given a vitamin D supplement of 400 IU a day.
Who’s at higher risk?
You’re probably not getting enough vitamin D if you:
- are over 50
- have dark skin
- don’t go outside very much
- wear clothing covering most of your skin
If you are in one of these groups, talk to your doctor about whether you should take a vitamin D supplement of 1000 IU every day, all year round.
Can you have too much of a good thing?
We don’t recommend taking any more than this amount because too much vitamin D can be harmful. Current evidence suggests that taking this amount will help reduce your risk of cancer but with the least chance of harm.