What Should I Eat While Breastfeeding?
Quick answer: Breastfeeding increases calorie needs by 400–500 kcal/day. Focus on nutrient density, calcium, iodine, omega-3s, and plenty of fluids. Most foods are fine — eat a varied, balanced diet.
What to Eat
Oatmeal and whole grains
Provide sustained energy; oats are commonly used as a galactagogue (milk supply support) though evidence is anecdotal.
Fatty fish (salmon, sardines) 2× weekly
DHA in breast milk is critical for infant brain development; mothers who eat fatty fish have higher milk DHA levels.
Dairy and calcium-rich foods
Breastfeeding draws calcium from maternal stores — 1000mg calcium daily prevents maternal bone loss.
Eggs
Choline is critical for infant brain development; breast milk choline depends on maternal intake.
Dark leafy greens (broccoli, kale, spinach)
Calcium, folate, and vitamins K and A — all important for both mother and infant.
Legumes and lentils
Plant protein, iron, and B vitamins — particularly iron to replenish post-birth blood loss.
Nuts and seeds (particularly flaxseed and chia)
Omega-3 ALA, zinc, and calcium — diverse micronutrients needed at elevated levels during lactation.
Water and fluids constantly
Breast milk is mostly water — adequate hydration directly impacts milk production.
What to Avoid
High-mercury fish (swordfish, shark, king mackerel, tilefish)
Mercury transfers to breast milk and can impair infant neurological development.
Alcohol
Passes into breast milk; affects infant sleep and development. If you drink, wait 2–3 hours per unit before nursing.
Caffeine in excess (>200mg/day)
Some caffeine passes into breast milk — excessive amounts can make infants irritable and affect their sleep.
Highly allergenic foods if infant shows sensitivity
Cow's milk proteins can transfer and cause colic in some infants — try dairy elimination for 2 weeks if suspected.
Herbal supplements without professional guidance
Some herbal teas and supplements (high-dose fenugreek, sage, peppermint) can reduce milk supply or have unknown infant effects.
Hydration
Drink water consistently throughout the day — aim for 3L total fluid intake. Many nursing mothers find drinking a large glass of water with every breastfeeding session helps maintain supply. Coconut water and fruit smoothies contribute to fluids. Limit alcohol and caffeine.
Tips
- •You need approximately 400–500 extra calories per day while breastfeeding — this is more than during pregnancy.
- •Continue taking a postnatal supplement with iodine and vitamin D — iodine is often missed and is critical for infant thyroid development.
- •Skin-to-skin contact and frequent feeding are the most effective milk supply boosters — more than any food.
- •Most babies are fine with all foods the mother eats — don't restrict unless there's a clear reaction in the baby.
- •Vitamin D supplement (1000 IU/day for mother) or infant vitamin D drops are recommended as breast milk is low in vitamin D.