A multi vitamin should be taken in the morning for energy, the B vitamins are the energy, and stress vitamins. D3, is best taken with calcium, at bedtime, to help promote relaxation, and better sleep. Calcium should be taken with a fat for better absorption, such as a spoon ful of peanut butter. Magnesium, is an excellent muscle, and mind relaxer, and will promote sleep. Obtained either in a capsule, or liquid form, for better absorption. Calcium, and magnesium, and zinc come in a combined capsule form, its cheaper than buying them separately, taken with D3. The usual dosage is 3 at bedtime, (cal/mag).