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4 rules for nursing mothers
Pregnancy

4 rules for nursing mothers

2 min readWeek 10
Key takeaways
2 min
  • Limit added sugars to 3.5 ounces (100g) per week and avoid sugary drinks and salty snacks to support healthy weight management during nursing.
  • Fill half your plate with vegetables at lunch and dinner, then add 3 oz of meat or fish daily to ensure proper nutrition for both mother and baby.
  • Choose low-fat foods and reduce portion sizes to safely lose up to 13 pounds in 12 weeks while maintaining milk quality.
  • Take vitamin B12 supplements if following a vegan diet, as this essential nutrient transfers to breast milk and prevents developmental delays in infants.
  • Apply all four rules simultaneously for maximum effectiveness, or implement one rule at a time for gradual healthy pregnancy weight management.

Nursing mothers should follow four key rules: limit added sugars to 3.5 oz weekly, choose low-fat foods, fill half their plate with vegetables, and reduce portion sizes. These guidelines support healthy weight loss of up to 13 pounds in 12 weeks while maintaining optimal nutrition for both mother and baby.

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4 rules for nursing mothers

Ideally, these four rules should be applied all at the same time. If so, you can lose 13 pounds (6 kg) in 12 weeks and then continue to gradually reduce your baby weight over the course of the year [1] with health benefits. But sticking to one rule at a time can also help new mothers lose weight.

What mom needs

  • Limit sweets (including soda) and salty snacks. Eat no more than 3.5 ounces (100 g) of added sugar per a week
  • Choose foods that are low in fat
  • Fill half your plate with vegetables at lunch and dinner
  • Reduce your serving sizes

What baby needs

After filling half a plate with vegetables, do not forget to put meat or fish on the other half once a day — a serving should be about 3 oz (90 g). Vitamin B12 is found only in animal products and it’s transferred to breast milk from your food. Therefore, if mom is on a vegan diet, she needs to take B12 supplements. Deficiency of this vitamin can cause stunted growth and development in a child [2].


  1. Effectiveness of a weight loss intervention in postpartum women: results from a randomized controlled trial in primary health care. Ena Huseinovic, Fredrik Bertz, Monica Leu Agelii, et al. The American Journal of Clinical Nutrition, August 2016. P. 362–370.

  2. Vitamin В12. Fact Sheet for Health Professionals. NIH, ODS, 2021.

Frequently asked questions

Nursing mothers can safely lose about 1 pound per week, totaling up to 13 pounds in 12 weeks. This gradual weight loss maintains milk quality while supporting overall health for both mother and baby.

Breastfeeding mothers should limit sweets, sodas, and salty snacks to no more than 3.5 ounces of added sugar per week. Focus on low-fat foods and fill half your plate with vegetables at main meals.

Nursing mothers on vegan diets need vitamin B12 supplements since this vitamin only comes from animal products. B12 deficiency can cause stunted growth and development problems in breastfed babies.

Nursing mothers should eat about 3 ounces (90g) of meat or fish once daily. This ensures adequate protein intake and provides essential nutrients like vitamin B12 that transfer to breast milk.

Medical Disclaimer

This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or qualified health provider with any questions you may have regarding a medical condition.

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Reviewed by healthcare professionals · Updated September 8, 2024

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