Vitamin B Complex (B1-B12)
All 8 B vitamins together — thiamine, riboflavin, niacin, B5, B6, biotin, folate, B12. For energy, nervous system, mood, and methylation. Look for methylated forms (methylfolate, methylcobalamin) for MTHFR gene variants. Turns urine bright yellow (riboflavin — harmless).
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If you take any medications, review these interactions carefully.
Levodopa (B6 reduces effectiveness), methotrexate, phenytoin, fluorouracil.
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Bright yellow urine (harmless), niacin flush, GI upset.
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