 Vitamin D Prevents Flu
The real reason why winter is the flu season is because the sun's rays are too weak in most parts of the planet to manufacture vitamin D from sun exposure; this compromises your immune system.
Numerous studies reflect the fact that by the end of winter, virtually everyone has deficient levels of vitamin D. Dietary sources are insufficient; the latest research indicates that we need 2,000IU - 10,000IU a day or more, not the piddly 400IU that has been the standard recommendation for ages.
So start loading up on vitamin D now!
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