It is best to take multivitamins and dha after breakfast, and calcium tablets should be taken one day before going to bed. Human vitamins and dha are the lowest in the morning. In addition, eating multivitamins and dha after breakfast is helpful for the digestion and absorption of fat-soluble vitamins and dha. It is better to take calcium orally once in the morning and once before going to bed. If you take it several times a day, it is best to take it about an hour after meals to reduce the influence of food on calcium absorption. People's blood calcium is the lowest in the middle of the night and the early morning. If you choose a calcium preparation, for example, once a day, it is best to take it before going to bed, so that the calcium preparation can be fully absorbed and utilized. Of course, liquid will be easier to digest and absorb.