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- A 2023 systematic review and meta-analysis found daily vitamin D supplementation reduced cancer mortality by a significant 12%
- Daily vitamin D supplementation was particularly beneficial for people aged 70 and over, as well as those who took vitamin D daily and were later diagnosed with cancer
- Among people who took daily vitamin D doses of 5,000 IU to 50,000 IU daily, no adverse effects were found
- Past research has found women with a vitamin D level at or above 60 ng/mL (150 nmol/L) had an 82% lower risk of breast cancer compared to those with levels below 20 ng/mL
- To optimize your vitamin D levels, regular sun exposure is the best option; however, if you’re unable to get adequate sun exposure each day, supplementation may be necessary
On a typical sunny day, your body may produce up to 25,000 international units (IU) of vitamin D.1 Yet, in the U.S., the average daily recommended intake is only 600 IU for people between the ages of 1 and 70, and 800 IU for those over 70.2
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