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![I'm very deficient in vitamin D I recently checked my B-12 levels my sister is saying that I should also be supplementing B-12 because it's low I have many symptoms and I'm I'm very deficient in vitamin D I recently checked my B-12 levels my sister is saying that I should also be supplementing B-12 because it's low I have many symptoms and I'm](https://preview.redd.it/im-very-deficient-in-vitamin-d-i-recently-checked-my-b-12-v0-ax4add004ahb1.jpg?width=640&crop=smart&auto=webp&s=84b0b174f7456509abd1028d75b9e711da817998)
I'm very deficient in vitamin D I recently checked my B-12 levels my sister is saying that I should also be supplementing B-12 because it's low I have many symptoms and I'm
![The health effects of vitamin D supplementation: evidence from human studies | Nature Reviews Endocrinology The health effects of vitamin D supplementation: evidence from human studies | Nature Reviews Endocrinology](https://media.springernature.com/m685/springer-static/image/art%3A10.1038%2Fs41574-021-00593-z/MediaObjects/41574_2021_593_Fig1_HTML.png)
The health effects of vitamin D supplementation: evidence from human studies | Nature Reviews Endocrinology
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