Vitamin B.Dr. David Culpepper responds, "Not at night, please. B1, B2, B3, B5, B6, B7, B9, and B12 are affected.
MultivitaminsDr. Monisha Bhanote adds, "Take multivitamins with breakfast or lunch. Multivitamins include fat-soluble vitamins D, E, A, and K, which are better absorbed by fat
Vitamin D.Stuart, "Vitamin C is best taken with food. Nighttime use may cause acid reflux and stomach upset."
Calcium.Stuart: "Calcium reduces magnesium production. Magnesium aids sleep."
Mayo Clinic: "Calcium supplements interact with antibiotics, bisphosphonates, and hypertension drugs.
Ask your doctor or pharmacist about calcium supplement-drug interactions. Take calcium supplements apart from multivitamins and iron-rich meals.