As long as you buy calcium supplement drugs from big brands, such as Calcium, Leli, etc., the prices should be similar. Don’t buy those recommended by store clerks you have never heard of, because the store clerk will definitely recommend them. For high-margin drugs, although the prices of big-brand drugs are not low, the profit is very small for merchants. The prices of off-brand drugs are low and the purchase price is lower, so don't buy them because the quality is not good. In addition, Huatuo’s membership days on the 6th, 16th and 26th are more suitable for buying medicines, you can get a discount of 16%, and there are also gifts!