Is a 500-Calorie Daily Deficit Safe While Breastfeeding?
For most well-nourished mothers, a 500-calorie deficit can be safe after milk supply is established (usually after week 6) as long as daily intake never drops below 1,800 calories, protein reaches 1.1 g/kg, and hydration is maintained. Monitor infant weight gain, your energy level, and milk volume weekly; if any decline, pause the diet and eat to hunger. Seek medical review if you have thyroid disease, diabetes, or twins.