Hi mama! From what I know, collagen is generally okay while breastfeeding kasi it's just protein breakdown, pero honestly better to confirm with your OB or pedia just to be safe, walang masama sa peace of mind, diba? A few of us have taken it postpartum without issues, pero bawat body is different, so best to get personalized advice from your doctor na. They'll know your health history better and can give you the go-ahead or suggest alternatives kung needed.