Yes, to an extent. Although eating enough calories is important for milk production, “enough” does not necessarily equate to greater than the lactating parent’s daily caloric expenditure. A lactating parent can lose weight while still fully nourishing their baby with breast milk.[1] In fact, creating a caloric deficit of 500 kcals/day alongside regular exercise is recommended for lactating parents who are overweight,[2] but severe energy restriction is not advisable. Eating fewer than 1,500 kcal per day may significantly decrease milk supply.[3][4]
Can I actively try to lose weight while breastfeeding and maintain supply?
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•Last Updated: May 16, 2025
Yes, breastfeeding parents can lose weight while maintaining milk supply by creating a caloric deficit of 500 kcals per day and engaging in regular exercise, as long as they consume enough calories and avoid severe energy restriction. Eating fewer than 1,500 kcal per day may significantly decrease the milk supply.