Weight loss while breastfeeding

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Looking for advice from woman who have lost weight while breastfeeding. I am about 4 pounds for prepregnancy weight but was overweight when I got pregnant! I was able to lose 40 pounds before, but I counted calories and ate around 1300 max. But now that I’m breastfeeding I read that I should consume atleast 1800. Looking for tips from moms who have succeeded in loosing weight while maintaining milk supply :)