How many calories do you need while breastfeeding?
Exclusive breastfeeding adds roughly 400 kcal a day. Here's why the early weeks are for refuelling — not dieting — and what to prioritise.
The number
Exclusive breastfeeding adds roughly +400 kcal a day to your energy needs. Making milk takes real energy, and your body draws on both what you eat and some stores laid down in pregnancy. That’s why appetite often increases in the early weeks — it’s your body doing its job.
Why the early weeks aren’t for dieting
In roughly the first six weeks, milk supply is still establishing. Sharp calorie deficits during this window can work against supply and against your own recovery from birth. The steadier approach is to eat enough, rest where you can, and let weight changes happen gradually rather than forcing them.
What to prioritise
- Fluids — milk production raises your fluid needs. Drink to thirst and keep water nearby when you feed.
- Calcium (~1000 mg/day) — protects your bone stores while you nurse.
- Protein — supports tissue recovery postpartum and helps you feel steadier.
- Regular meals and snacks — frequent, easy-to-grab food beats trying to eat “perfectly.”
What Fawna does
Fawna raises your daily target by around 400 kcal when you’re exclusively breastfeeding, and keeps calcium, protein and hydration in view. It deliberately avoids pushing aggressive deficits during this stage — because refuelling, not restriction, is what this season calls for. As feeds change, your needs change, and Fawna adapts with you.
FAQ
Will eating more make it harder to lose baby weight? The +400 kcal reflects the energy breastfeeding actually uses. Many people find weight settles gradually while nursing; forcing a deficit early can backfire on supply and energy.
Do I need to avoid certain foods while breastfeeding? Most people don’t need to avoid much. If you suspect a food is affecting your baby, talk to your health visitor or doctor rather than cutting broadly.
References
- Institute of Medicine — Dietary Reference Intakes: Energy (2005)
- Academy of Nutrition and Dietetics — Breastfeeding nutrition
- NHS Best Start in Life — Diet when breastfeeding
General information, not medical advice. Reviewed for accuracy; always consult a qualified professional about your health.
Fawna is launching soon — join the early-access list.