When vitamin D levels drop too low, this system can malfunction ... suggests different vitamin D amounts based on age – 600 IU daily for those between 51 and 70 years old, increasing to 800 ...
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3 ways to boost your vitamin D levelsIn this article: Nature Made Vitamin D3 2000, Ddrops Kids Booster 600 IU 100 Drops and MaryRuth's Vitamin D3 Liquid Spray ...
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