Add it into food or drinks.
You can add it into mineral water, drinking water, soup, noodles, porridge, rice, dishes, honey, fruit juice, drink(except Carbonated drinks), cereals, yogurt, etc.
Don't add it into the food & drinks with high protein and high fat, tea, etc., in order to avoid reaction, it will not be harmful to the body, but it looks not good resulting in stratification or caking.
Every day you can take one time or several times, as long as the amount is adequate each day. Recommend to take the calcium before going to bed.