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Embarking on the path of intermittent fasting while breastfeeding is like walking a tightrope between a mother’s nutritional needs and her baby’s growth. It’s a dance of timing, biology, and nutrition that begs the question: How does intermittent fasting influence milk production and the health of both mother and baby? As we unpack this topic, we’re not just looking at dietary trends; we’re piecing together a puzzle that intertwines with the rhythms of motherhood.

Let’s journey together through the intricacies of maintaining energy, securing a steady milk flow, and eating well, all while considering the role intermittent fasting might play during this tender phase of life.

Can breastfeeding moms try intermittent fasting?

For mothers nursing their little ones, intermittent fasting isn’t a decision to take lightly. Sure, it’s got its perks for health and well-being, but is it the right fit for every breastfeeding journey? The heart of the matter lies in making sure the mother and baby are getting all the nutrients they need for their health and development.

Before diving into any fasting routine, breastfeeding women need to chat with their healthcare provider. This step ensures breastfeeding moms that any tweaks to their eating habits won’t throw a spanner in the works for milk production or quality and that mum and bub keep thriving.

How does intermittent fasting affect female hormones and milk supply?

Tackling intermittent fasting while breastfeeding is a delicate business, especially when you consider the hormonal ballet that enables milk production. Breastfeeding is a hormone-powered process, relying on the ebb and flow of prolactin and oxytocin to decrease milk supply. Throw fasting into the mix, and you might stir up hormonal harmony.

  • Hormonal Harmony: Staying hormonal levels is key for a reliable milk supply. Intermittent fasting can shake up these levels, affecting how much milk you can produce.
  • Calories Count: It’s all about the calories when making milk. If fasting means fewer calories, this could mean less milk for the little one.
  • Nutrient Know-How: The quality of breast milk is a mirror of mum’s diet. Even with fasting periods, it’s crucial to pack those nutrients into the eating windows to keep that milk full of goodness.
  • Hydration: Fasting often reduces fluid intake, yet lactating women have increased fluid requirements to support milk production. Insufficient hydration can decrease breast milk supply.
  • Energy Levels: The energy demands of breastfeeding are high. Fasting while nurturing a new life through breastfeeding is a delicate balance, as a mother’s energy is the fuel for her metabolism, body’s functions and the milk production that feeds her baby.
  • Mental and Physical Resilience: Caring for an infant is a marathon of mental and physical stamina. Fasting might tip the scales towards increased exhaustion and stress, which can ripple through a mother’s mental health and, by extension, her breastfeeding capabilities.

In wrapping up, intermittent fasting has its place in the wellness landscape, but when it comes to breastfeeding mothers, it’s not a universal fit. Breastfeeding mothers must weigh the possible risks and have a candid discussion with a healthcare provider to ensure that the dietary needs of both her and her baby are comprehensively addressed.

Fasting window for breastfeeding mother

alternate day fasting

For the breastfeeding mother pondering over intermittent fasting, timing is everything. Crafting an eating window that aligns with her body’s and her baby’s needs is key. A common approach might be an eating window of 8-10 hours, followed by a fasting stretch of two extended periods of 14-16 hours, preferably overnight.

This pattern keeps the milk supply steady and the baby’s nutrient intake constant. During the eating window, it’s not just about the quantity of additional calories but the quality of food packed with nutrients to fuel milk production and meet the heightened energy demands of breastfeeding. Above all, any fasting plan should be under the watchful eye of a healthcare professional, ensuring the well-being of both mum and bub.

The Implications of intermittent fasting while breastfeeding

Choosing to fast while breastfeeding is a path tread with care, as it holds several potential consequences for both mother and child. Breastfeeding demands a lot of energy, and fasting can significantly dip into the milk supply and affect the mother’s growing baby’s nutritional well-being—factors intrinsically linked to the nursing baby’s health.

  • Milk Supply Concerns: A drop in caloric intake due to fasting can lead to a decrease in breast milk supply. The milk volume needs to stay consistent to support the baby’s growth.
  • Breast Milk Nutrition: The nutritional value of breast milk mirrors the mother’s dietary intake. Fasting might limit the consumption of crucial nutrients, potentially impacting the richness of breast milk.
  • Maternal Energy Levels: Sustaining energy levels is crucial for new mothers. Fasting might contribute to fatigue and decreased energy, which can be particularly challenging while caring for an infant.
  • Hydration Status: Adequate hydration is vital for milk production. Fasting, especially without sufficient fluid intake, can compromise hydration status, potentially impacting breast milk volume.
  • Hormonal Balance: Fasting can influence hormonal balance, integral to breastfeeding. Hormones such as prolactin and oxytocin govern milk production and ejection, and their levels could be affected by changes in eating patterns.
  • Weight Management: While some mothers may consider fasting as a means to manage post-pregnancy weight, it is crucial to balance weight loss goals with the nutritional demands of breastfeeding.
  • Baby’s Growth and Development: The baby’s growth and development are directly influenced by the quality and quantity of breast milk. Any factors that affect breastfeeding can, therefore, have a knock-on effect on the infant’s health.

In essence, fasting while breastfeeding is a complex issue that intertwines with the intricate demands of maternal nutrition and infant growth. Nursing mothers must consult healthcare providers before undertaking any form of fasting to ensure that the health and developmental needs of both nursing moms and their babies are not compromised.

How to start intermittent fasting while breastfeeding

For new mothers, the postpartum period is a significant physical and emotional adjustment. Among the myriad considerations for a mother’s well-being is managing post-pregnancy weight.

Intermittent fasting has emerged as a popular method for weight control, but when it comes to breastfeeding mothers, the approach must be tailored to accommodate the unique demands of nursing. Starting intermittent fasting while breastfeeding is a decision that should be made with caution and awareness of the potential impact on both mother and child.

  1. Consultation with a Healthcare Provider: Before beginning any fasting regimen, it is crucial to seek advice from a healthcare professional. They can provide personalised guidance based on your medical history and breastfeeding status.
  2. Gradual Introduction: Start with shorter fasting periods and gradually increase the duration as your body adapts. This could mean initially skipping a late-night snack or delaying breakfast to extend the overnight fast.
  3. Monitoring Milk Supply: Keep a close watch on your milk production. Any signs of decreased supply may indicate the need to adjust your fasting schedule or increase caloric intake during eating windows.
  4. Adequate Calorie Intake: Ensure that you consume enough calories during your eating periods to support both your energy needs and milk production. This is not the time for severe calorie restriction.
  5. Nutrient-Dense Foods: Focus on foods rich in essential nutrients, such as proteins, healthy fats, complex carbohydrates, vitamins, and minerals, to support your body’s needs and those of your breastfeeding infant.
  6. Hydration: Drinking plenty of fluids is vital, especially when breastfeeding. Adequate hydration is essential to maintain milk volume and overall health.
  7. Flexible Eating Windows: Choose an eating window that aligns with your hunger cues and daily routine. Some mothers may find that a mid-morning to early evening window suits their lifestyle and baby’s feeding schedule best.
  8. Listening to Your Body: Pay attention to how you feel. If you experience fatigue, mood swings, or other adverse symptoms, reassess your fasting plan.
  9. Support System: Engage with a community or support group of like-minded individuals who can offer encouragement and share experiences.
  10. Regular Evaluation: Regularly evaluate the fasting plan’s impact on your health and breastfeeding experience, adjusting as necessary to ensure optimal outcomes for you and your baby.

By approaching intermittent fasting with a structured plan and focusing on nourishment, breastfeeding mothers can explore this dietary pattern with the potential for positive health outcomes. However, the primary goal should always be to support the health and nutritional needs of both the breastfeeding mother and the breastfeeding infant.


Foods to eat and avoid for breastfeeding women on intermittent fasting

When embarking on intermittent fasting while breastfeeding, it’s paramount for mothers to be discerning about their food choices to ensure they and their babies receive the necessary nutrients. Here’s a guide on what to eat and what to avoid:

Foods to Eat:

  • Nutrient-Dense Diet: Prioritise fruits, vegetables, whole grains, lean proteins, and healthy fats to deliver a rich array of nutrients.
  • High-Fiber Foods: To aid digestion and prolong satiety, include plenty of fibre-rich foods like legumes, oats, and quinoa.
  • Hydration-Boosting Foods: Cucumbers, watermelons, and berries can help maintain hydration levels, which is crucial for milk production.
  • Calcium-Rich Foods: Dairy or fortified plant milk, leafy greens, and almonds are essential for bone health for both mother and baby.
  • Iron-rich foods: Lean meats, lentils, and spinach can help prevent anemia, which is especially important when menstruation resumes postpartum.

Foods to Avoid:

  • High-Mercury Fish: To prevent mercury exposure to the baby, avoid fish like swordfish and king mackerel.
  • Processed Foods: Limit foods high in added sugars and unhealthy fats, which can affect blood sugar levels and overall health.
  • Caffeine: Excessive caffeine can be transmitted through breast milk and may affect the baby’s sleep.
  • Alcohol: It’s best to avoid alcohol, as it can be passed to the baby through breast milk and impact development.

In essence, the focus should be on a balanced diet that supports breastfeeding while on intermittent fasting. It’s crucial to ensure that on alternate days during the eating window, the consumption of calories and nutrients meets the increased demands of lactation. Consulting with a healthcare provider or a dietitian can provide tailored advice to meet individual health needs and support successful breastfeeding.

Safety precautions while breastfeeding

Breastfeeding weaves a bond of nourishment and immunity between mother and child, yet it’s a journey that demands vigilance to ensure health and safety. It’s not just about the milk; it’s about the holistic health practices that surround this precious period.

Safety Measures for Breastfeeding Mothers:

  • Medication Consultation: Before taking any medication, a chat with a healthcare provider is a must to prevent any risks to the baby via breast milk.
  • Steering Clear of Harmful Substances: Alcohol and tobacco are off the table. They can taint milk quality and hinder a baby’s growth.
  • Dietary Care: A balanced diet is key. Avoid high-mercury fish and keep caffeine to a minimum to shield the baby from potential harm.
  • Safe Sleep Practices: If co-sleeping, ensure the baby’s space is secure and free from loose bedding or pillows that could present dangers.
  • Breast Health Monitoring: Watch for signs of mastitis or blocked ducts to avoid complications.
  • Impeccable Hygiene: Keep nipples and hands clean to prevent infections, especially before touching the baby or breast pump gear.
  • Up-to-date Vaccinations: Protect yourself and your baby from preventable diseases with timely vaccinations.
  • Community Support: Connect with lactation experts and support circles for advice and to perfect breastfeeding techniques.

In sum, breastfeeding, while a natural act, calls for a proactive approach to safety, ensuring the well-being of both mother and child. By adhering to these safety measures, mothers can confidently nourish their babies, knowing they safeguard their health.

Breastfeeding and weight loss

sleep deprivation

Breastfeeding is often spotlighted for its role in postpartum weight loss, sparking curiosity among new mothers eager to regain their pre-pregnancy physique in a healthy, sustainable way.

The interplay between breastfeeding and weight loss is multifaceted. It’s a natural process that not only provides essential nutrition to the infant but also influences a mother’s caloric expenditure and weight loss journey. Grasping the nuances of breastfeeding benefits mothers aiming to manage their baby’s weight more mindfully postpartum. By understanding the energy demands of milk production, mothers can tailor their nutrition and activity levels to support both their baby’s growth and their own health goals.

Weight Loss During Breastfeeding:

  • Caloric Demand: Breastfeeding can burn 500-700 calories daily, contributing to gradual weight loss.
  • Appetite Regulation: Nursing mothers may experience increased appetite, making mindful eating important to avoid consuming excess calories.
  • Nutrient-Rich Diet: A nutrient-rich diet supports milk production and may aid in more efficient weight loss.
  • Stay Hydrated: Adequate fluid intake is crucial, as dehydration can be mistaken for hunger and lead to overeating.
  • Physical Activity: Gentle exercise, in conjunction with breastfeeding, can support weight loss while also improving cardiovascular health.
  • Weight Loss Pace: A slow and steady pace of weight loss is recommended to ensure milk supply is not compromised.
  • Hormonal Influence: The hormonal changes associated with breastfeeding can impact weight loss, often aiding in reducing maternal fat stores.
  • Individual Variation: Every mother’s body responds differently to breastfeeding, with some losing weight easily and others needing more time.

In summary, breastfeeding can contribute to postpartum weight loss. Still, it should be approached as part of a broader lifestyle gain weight strategy that includes a balanced diet and physical activity. It is essential for mothers to have realistic expectations of gaining weight and to prioritise the health and well-being of both themselves and their babies over rapid weight loss.


In conclusion, the journey of intermittent fasting while breastfeeding requires careful consideration and a balanced approach. While it presents potential benefits for postpartum weight management, it is essential to prioritise the nutritional needs of both mother and child. Breastfeeding mothers contemplating intermittent fasting should consult with healthcare professionals to ensure their dietary patterns support robust milk production and provide the energy necessary for the demands of new motherhood.

By focusing on nutrient-dense foods and listening to their bodies, mothers can navigate intermittent fasting in a way that harmonises with the nurturing role of breastfeeding. If you’re considering this path, remember that every mother’s experience is unique, and what works for one may not suit another. Embrace the journey with patience and care, and always keep the well-being of you and your baby at the forefront of any dietary decisions.

If you’re considering intermittent fasting while breastfeeding and seeking professional guidance, we’re here to support you. At Super Health Chatswood Medical Centre, our team of healthcare professionals is dedicated to providing you with personalised advice that aligns with your health goals and your baby’s needs. Don’t hesitate to reach out. Call us today at (02) 9884 9300 to schedule a consultation and take the first step towards a balanced approach to your health and well-being.


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