8 doctors weighed in:

How much vitamin d a day should one take ?

8 doctors weighed in
Dr. Daniel McGee
Family Medicine
4 doctors agree

In brief: It depends

The institute of medicine sets recommended dietary allowance(rda) at 600 iu for people ages 1-70 with safe upper limits for daily intake ages 9 & above at 4, 000iu.
Many people take doses much higher than this if their levels are low but should do so under the supervision of their physician. If levels are normal 1, 000 iu is a good maintenance dose for adults. Vit d3 is better absorbed than d2.

In brief: It depends

The institute of medicine sets recommended dietary allowance(rda) at 600 iu for people ages 1-70 with safe upper limits for daily intake ages 9 & above at 4, 000iu.
Many people take doses much higher than this if their levels are low but should do so under the supervision of their physician. If levels are normal 1, 000 iu is a good maintenance dose for adults. Vit d3 is better absorbed than d2.
Dr. Daniel McGee
Dr. Daniel McGee
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Dr. Frederick Singer
Internal Medicine - Endocrinology
1 doctor agrees

In brief: Vitamin D intake

Vitamin d intake depends on what the level of serum 25ohd is in the blood.
The average normal person should take at least 1000 u of vitamin D3 daily.

In brief: Vitamin D intake

Vitamin d intake depends on what the level of serum 25ohd is in the blood.
The average normal person should take at least 1000 u of vitamin D3 daily.
Dr. Frederick Singer
Dr. Frederick Singer
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Dr. PHILLIP KIM
Family Medicine

In brief: Depends

Really depends on whether or not there is deficiency.
As a supplement for osteoporosis prevention 800iu daily should be adequate. Otherwise any deficiency needs higher amounts with followups on vitamin d 25oh level. If you are concerned, your doctor can order this test.

In brief: Depends

Really depends on whether or not there is deficiency.
As a supplement for osteoporosis prevention 800iu daily should be adequate. Otherwise any deficiency needs higher amounts with followups on vitamin d 25oh level. If you are concerned, your doctor can order this test.
Dr. PHILLIP KIM
Dr. PHILLIP KIM
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