Very good and effective, only it doesn't have a measuring cup. But it is a powder and dissolves completely in liquid.

It seems to be very good, I generally feel a sense of well-being and endurance lately that I have been using it, in combination with vitamins and other supplements. So I don't know if it is solely due to this. You mix it in a glass of water. One level teaspoon is enough. It dissolves immediately as soon as it falls into the glass. Of course, you mix it afterwards. Its taste is chalky. However, it is not bothersome. But do not abuse calcium, not large doses and not as a daily supplement because you may develop kidney stones out of nowhere. Eat occasionally some yogurt that is rich in calcium. Each yogurt contains about 400mg of calcium per cup, which is about half of your daily calcium needs. The quality of calcium in CITRATE form is the best. In any supplement of this kind that you order, prefer CITRATE form if you are given the option. For example, in magnesium oxide supplements, etc. It is perfectly absorbed, does not upset the stomach, and is generally the best. Because I have researched it, in my opinion, any other form is a waste of money. Also, after years of trying and buying vitamins and all related supplements from almost all companies, I have now come to two brands that I see actually work. Lamberts and Now Foods are the ones that personally work for me. Until proven otherwise, I will continue to use them. And one last thing. The multivitamins that we usually take daily contain a funny amount of calcium and magnesium compared to our daily needs. Especially calcium and magnesium are almost non-existent in them, maybe because it is expensive, maybe to make you buy an extra supplement. So do not forget to supplement either with a proper diet or by ordering calcium and magnesium supplements. Calcium and magnesium require specific amounts every day and their deficiency prevents the body from properly performing over 400 processes daily, something that you will come across one day.