Can I do ProLon® while breastfeeding? 22 February 2022 07:41 We suggest not following ProLon® if you are actively breastfeeding. Related articles Why should I avoid extreme temperature environments while on ProLon®? Can I do ProLon® if I’m pregnant? Do you experience ketosis while on ProLon®? What are the potential side effects of ProLon®? Will I lose muscle mass while I am on this programme?