Vitamins are essential substances that cannot be manufactured by the body. We need small amounts of vitamins for growth and development. Without vitamins the body cannot survive.
The best time to take vitamins is during the day, after a meal.
Never take supplements on an empty stomach - they will quickly pass out in your urine. This is especially true for the B and C vitamins that dissolve in water.
The fat-soluble vitamins A, D, E and K can be stored in the body for up to 24 hours and are sometimes stored in the liver for even longer.