Can I Take 4000 IU of Vitamin D Per Day?
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6 min read
The National Institutes of Health (NIH) reports that the tolerable upper intake level (UL) for vitamin D is 4,000 IU per day for most adults. However, whether this specific dose is appropriate for you depends on individual health factors, your baseline vitamin D levels, and whether it's prescribed by a healthcare provider. This guide provides comprehensive information to help you understand the safety and considerations of taking 4000 IU of vitamin D daily.