How to take Vitamins B and C

Since Vitamin B helps promote energy metabolism, taking it on an empty stomach in the morning allows for optimal effects throughout the day. Vitamin C can cause gastrointestinal upset, so it is recommended to take it after a meal. Because Vitamin C is slightly acidic, taking it on an empty stomach may cause heartburn. It is said that taking Vitamin C in small amounts several times throughout the day is effective, as it is used by the body for a short period and excreted through urine.