Unlike vitamin and mineral supplements our products are essentially concentrated food, so there should be no issues with nursing, however it's always a good idea to ask your doctor first. In our opinion due to the increased body requirements for nutrients during breastfeeding, nutrient dense foods are always a good idea. We would recommend starting slowly as anything in your diet has the potential to change the taste of your breast milk. It’s always a good idea to consult with your medical professional or healthcare provider when seeking medical advice, diagnoses or treatment.