You can eat collagen during breastfeeding, collagen is mainly to supplement protein, but more importantly, it has the effect of beauty, skin care, so that the skin elasticity increase, reduce wrinkles and will make the skin shine. If you eat collagen during breastfeeding, it will not affect the quality of milk, so the baby breastfeeding will not be affected, so you can eat collagen during breastfeeding. It is true that you have to give attention to your diet and medication when you are breastfeeding, because if you do not pay attention to your diet and eat too much cold food, it may lead to diarrhea in the baby. In addition, if you eat some drugs that you should not eat in your diet, it may be absorbed by the baby through the excretion of milk, which will have an impact on the growth and development of the baby, so you must pay attention to your diet and medication.