Calcium: The main ingredient of this calcium supplement product is calcium carbonate, and it also contains calcium citrate and vitamin D3, which can effectively improve the absorption rate of calcium.

Kathleen D: This calcium supplement product contains calcium citrate and vitamin D3, which can help the absorption of calcium without the side effects of aluminum citrate.

Swissy calcium citrate mini-calcium: This calcium supplement product is the representative of calcium citrate, which is mild and does not hurt the stomach, and vitamin D is added to help promote the absorption of calcium.

Calcium amino sugar: this calcium supplement product can not only supplement calcium, but also supplement amino sugar, which is helpful for the repair and protection of cartilage.

When choosing calcium supplement products, you should choose suitable products according to your physical condition and needs, and make reasonable calcium supplement according to the doctor's advice.