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4000 IU Vitamin D: Benefits, Risks, and the Optimal Daily Dosage for Health

Vitamin D is a fat-soluble vitamin that plays an essential role in numerous physiological functions, including calcium absorption, immune system regulation, and bone health. Unlike most vitamins, vitamin D acts more like a hormone, influencing various organs and tissues throughout the body. The body synthesizes vitamin D primarily through skin exposure to sunlight, yet many people do not receive adequate sun exposure due to lifestyle factors, seasonal variations, and the use of sunscreen. As a result, dietary intake and supplementation become necessary to maintain optimal levels.

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