Three and a half months recently always have green stools, please ask what is the matter

Patient's question:

My three-month-old son has been having green stools recently. What could be the reason? He is currently consuming more formula than breast milk. May I add some complementary foods? Thank you

Doctor's answer:

Excess bilirubin is not a problem. You can take Mimi Ai for it. Additionally, calcium supplementation, such as Longmu Zhuanggu Granules, can solve loose stools and help with calcium intake.