What is the best food for a 5-month-old baby to supplement calcium?

Patient's question:

No

Doctor's answer:

My baby started taking calcium drops since they were over 50 days old, but later found out there was no effect at all. It was also so expensive, and the calcium deficiency was still very serious. The doctor prescribed Gedi Xin granules, which are sweet and sour, and my baby loves drinking them.