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Typically, the positive effects last from about a week up to a month, though this can vary based on how your body absorbs and utilizes the vitamin, as well as your overall health
References Zheng Y, Ma AG, Zheng MC, Wang QZ, Liang H, Han XX, Schouten EG
Civil Engineering, UCLA Last updated: July 2026 Human-researched and AI-assisted with full editorial review
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