Question: what vitamins should i not take at night?
Answer: Maca Root. Considering Maca is known as the 'libido-boosting adaptogen,' you'd think taking it before heading to bed would be a good idea. ... 
Ashwagandha. This powerful herb's claim to fame: It can support both sustained energy during the day and sleep quality at night, says Axe. ... 
Vitamin D. ... 
B Vitamins. ... 
Multivitamins. ... 
Calcium.