Nutrition and Breastfeeding
Breastfeeding mothers generally need more calories to meet their nutritional needs while breastfeeding. An additional 330 to 400 kilocalories (kcal) per day is recommended for well-nourished breastfeeding mothers, compared with the amount they were consuming before pregnancy (approximately 2,000 to 2,800 kcal per day for breastfeeding women verses 1,600 to 2,400 kcal per day for moderately active, non-pregnant women who are not breastfeeding).
The number of additional calories needed for an individual breastfeeding woman is also affected by her age, body mass index, activity level, and extent of breastfeeding (exclusively breastfeeding verses breastfeeding and formula feeding). CDC-Recommendation