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For adults, a common dose of Vitamin D is between 800 to 2000 IU per day, depending on individual needs and health conditions

This injectable formulation allows for much higher plasma concentrations of vitamin C, bypassing the limitations of gastrointestinal absorption and providing rapid systemic availability

Aside from vitamin K, which has a low potential for toxicity, the remaining three fat-soluble vitamins have a set UL due to their potential to cause harm at high doses

It acts primarily through gene expression modulation, delivering copper to enzymes and triggering transcription factor cascades rather than saturating one receptor