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Each bottle contains 30 capsules, enough for one full month of use at the recommended daily serving of one capsule per day
Choose TB-500 when your research interest is broader and more recovery-system oriented
To achieve blood levels of at least 30 ng/mL, adults living at temperate latitudes (think: anywhere with distinct seasons) need 800 to 1,000 IU per day, ideally from vitamin D3, which is more effective than D2
Khoo TK, Lin J
Key said there was limited data available
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