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Vitamin D3 Vitamin D labs are important when supplementing with Vitamin D3 as it can become toxic if levels are too high
Several studies have shown that intramuscular and intravenous B12 delivery is more effective than oral supplementation in people with deficiency or poor absorption
10.1038/nm.3761 61 FontanellaR
Symptoms typically improve within 4-8 weeks as the body adjusts to therapy, though this timeframe varies by individual and dose
Johns wort and B vitamins, selenium, and the like
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