You need to see if this brand of calcium tablets has hygiene approval. Generally speaking, there is a blue sign in the upper left corner of the bottle label. If there is, it is health care products, not food. Health products are managed by the Food and Drug Administration, and manufacturers must have GMP certification, not QS certification. QS certification is the certification of food manufacturers. GMP certification is stricter than QS certification and must pass the certification issued by the provincial US Food and Drug Administration. Health care products are managed by the Industrial and Commercial Bureau in the sales process.