How to Lose Weight While Breastfeeding

Discover how to lose weight safely while breastfeeding. Minimum 1800 kcal, moderate deficit, hydration. Track your calories with Voical.

5 kg
Goal
4 to 8 months
Recommended duration
300-400 kcal/day
Deficit/day
0.5-1 lb per week
Expected rate

Calorie calculation examples by profile

Sedentary breastfeeding woman, 30 years old, 165 lbs

Maintenance calories 2300 kcal
Target (with deficit) 1900 kcal
Deficit: 400 kcal/day

Active breastfeeding woman, 30 years old, 165 lbs

Maintenance calories 2550 kcal
Target (with deficit) 2150 kcal
Deficit: 400 kcal/day

Sedentary breastfeeding woman, 35 years old, 187 lbs

Maintenance calories 2450 kcal
Target (with deficit) 2050 kcal
Deficit: 400 kcal/day

Active breastfeeding woman, 35 years old, 187 lbs

Maintenance calories 2750 kcal
Target (with deficit) 2350 kcal
Deficit: 400 kcal/day

Calorie needs during breastfeeding

Exclusive breastfeeding burns about 300-500 extra calories per day. Your calorie needs are therefore higher than before pregnancy. NEVER go below 1800 kcal/day while breastfeeding to avoid compromising milk production and your health.

A very moderate deficit

Limit your deficit to 300-400 kcal/day maximum. This allows slow weight loss (0.5-1 lb/week) but safe for you and your baby. Toxins stored in fat can be released during rapid weight loss and pass into breast milk.

Hydration is crucial

Milk production requires lots of water. Drink at least 2.5-3 liters (85-100 oz) per day. Dehydration can affect milk production and your energy. Keep a water bottle near you during feedings.

When to start?

Wait at least 6-8 weeks postpartum before creating a calorie deficit. Your body needs time to establish lactation and recover from delivery. Some experts recommend waiting until breastfeeding is well established (3 months).

Important

Never go below 1200 kcal/day (women) or 1500 kcal/day (men) without medical supervision. Too aggressive a deficit can be dangerous for your health and counterproductive for weight loss.

Complete Guide to Weight Loss While Breastfeeding

Losing pregnancy weight is a common goal, but breastfeeding imposes specific constraints. This guide accompanies you for safe weight loss that preserves your milk production.

Understanding Your Needs

Extra Calories

Exclusive breastfeeding requires about 500 extra kcal/day. A breastfeeding woman therefore needs:

  • Sedentary: 2200-2400 kcal/day
  • Active: 2500-2700 kcal/day

Absolute Minimum

Never go below 1800 kcal/day. Too low an intake can:

  • Reduce milk production
  • Affect milk quality
  • Cause deficiencies for you and baby
  • Release toxins stored in fat

The Safe Strategy

Maximum Deficit

  • 300-400 kcal/day: No more
  • Expected loss: 0.5-1 lb/week
  • Priority: Milk production, not the scale

Timing

  1. 0-6 weeks: No deficit, establish lactation
  2. 6-12 weeks: Light deficit possible if breastfeeding well established
  3. 3 months+: Moderate deficit acceptable

Monitoring

  • Watch milk production (baby’s wet diapers)
  • Your energy shouldn’t drop
  • Baby’s weight should progress normally

Optimal Nutrition During Breastfeeding

Protein

  • 1.3-1.5g/kg body weight
  • Essential for milk production
  • Sources: meat, fish, eggs, legumes

Hydration

  • Minimum 2.5-3 liters (85-100 oz)/day
  • Increase if urine is dark
  • Water, herbal teas, broths

Key Micronutrients

  • Calcium: 1000-1300 mg/day
  • Vitamin D: 600-800 IU/day
  • Omega-3: Fatty fish 2x/week
  • Iron: Monitor with your doctor

Why Voical Can Help You

During breastfeeding, it’s crucial to eat ENOUGH while maintaining a slight deficit. Voical helps you verify you stay above 1800 kcal while creating the safe deficit that allows gradual weight loss.

Frequently asked questions