Recommended Supplement Limits
The U.S Institute of Medicine has established a Tolerable Upper Level of Intake (UL) to protect against vitamin D toxicity. These levels in micrograms (ug) and International Units (IU) for male and female are:
(Conversion : 1 µg = 40 IU and 0.025 µg = 1 IU.)
- 0-6 months: 25 µg (1000 IU)
- 7-12 months: 38 µg (1500 IU)
- 1-3 years: 63 µg (2500 IU)
- 4-8 years:75 µg (3000 IU)
- 9+ years:100 µg (4000 IU)
- Pregnant and Lactating: 100 µg (4000 IU)
The recommended daily allowance is 15 µg/d (600 IU per day). Overdose has been observed at 1,925 µg/d (77,000 IU per day). Acute overdose requires between 15,000 µg/d (600,000 IU per day) and 42,000 µg/d (1,680,000 IU per day) over a period of several days to months, with a safe intake level being 250 µg/d (10,000 IU per day). Foods contain low levels, and have not been known to cause overdose.
Read more about this topic: Hypervitaminosis D
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