Taking some "Immune Zinc" supplements to try and boost immune system and improve wound healing.
After taking one of these, a few hours later I get SUPER tired and generally pass out for a two hour nap.
What ingredient could be doing that? Nothing on the bottle indicates that drowsiness should be an effect...
This fat-soluble Vitamin A (retinol acetate) at 2500 lU plus high B6 (41.1 mg) can cause tiredness in some due to toxicity risk or nerve effects. Zinc and magnesium can also influence energy, especially if dosage is high or imbalance occurs. Dose and tolerance matter.