How Quickly Does Vitamin D Deplete from the Body?
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4 min read
The primary circulating form of vitamin D, 25-hydroxyvitamin D [25(OH)D], has a half-life of approximately 15 to 25 days, though the rate at which an individual's vitamin D levels deplete varies significantly based on numerous factors. This fat-soluble vitamin is stored in the body's fat tissues and released gradually over time, which buffers against sharp declines when intake or sun exposure is reduced. However, an inadequate supply from sources like diet and sunlight will eventually lead to deficiency, with symptoms often taking years to manifest.
