Breastfeeding is a wonderful way to nourish your baby and support your own health, but having diabetes can present some unique challenges. Understanding how your body processes sugar, insulin, and hormones can help you maintain stable blood sugar, support your milk supply, and enjoy a smoother and more confident breastfeeding journey.

Types of Diabetes Mellitus

Insulin is a hormone made by the pancreas that helps control blood glucose, or sugar. When your body doesn’t respond well to insulin, your blood sugar can rise, while medications or changes in activity can sometimes cause low blood sugar (hypoglycemia). Diabetes mellitus occurs when the body has difficulty producing or using insulin effectively, making it harder to maintain stable blood sugar levels.

There are several types:

Type 1 Diabetes (T1D)

An autoimmune condition in which the pancreas produces little or no insulin requiring lifelong insulin therapy. Unlike type 2 diabetes, T1D is not caused by insulin resistance—people with T1D need insulin because their bodies cannot make enough, rather than because their bodies cannot use it effectively. T1D usually develops in childhood or young adulthood.

Type 2 Diabetes (T2D)

The body becomes resistant to insulin, often leading to high blood sugar. When you have insulin resistance, your body does not respond effectively to the insulin your pancreas produces. Over time, the pancreas needs to make more and more insulin to keep blood glucose levels normal. T2D is usually seen in adulthood but is increasingly diagnosed in younger people.

In the United States, more than half of adults over age 18 have diabetes or prediabetes, highlighting how common insulin resistance and blood sugar issues are.

Gestational Diabetes (GDM)

This form of diabetes develops during pregnancy and usually resolves after birth. According to the U.S. Centers for Disease Control and Prevention (CDC), although glucose intolerance resolves after delivery in about 90% of women with GDM, their risk of developing T2D is about 35% to 60% within 5 to 10 years after pregnancy. This represents a 5‑ to 7‑fold higher risk compared with women who did not have GDM.

Polycystic Ovary Syndrome (PCOS)

While not a form of diabetes itself, PCOS is linked to insulin resistance and metabolic syndrome, increasing the likelihood of developing GDM and T2D.

Symptoms of Diabetes and Insulin Resistance

Women with diabetes or insulin resistance may experience the following symptoms:

  • Irregular or missed periods

  • Extra hair on face or body

  • Cystic, painful acne

  • Weight gain or difficulty losing weight

  • Dark patches on neck, groin, and under breasts

  • Brain fog, fatigue, mood swings, headaches, or sleep problems

  • Excessive thirst and urination

  • BMI >25

How is Diabetes Diagnosed?

Diabetes is diagnosed using a combination of lab tests and clinical guidelines. This may include urine tests to check for glucose or ketones, as well as blood glucose testing such as fasting, random, or post-meal measurements. Healthcare providers often follow criteria established by the American Diabetes Association to determine risk, diagnosis, and appropriate follow-up care.

Long-term Health Concerns

If unmanaged, gestational diabetes can increase the risk of developing T2D later in life. It is also associated with a higher risk of cardiovascular disease, high blood pressure, obesity, and other metabolic complications. Ongoing monitoring and healthy lifestyle choices after pregnancy are important steps in protecting long-term health.

Treatment Options

Managing diabetes and insulin resistance typically involves a combination of lifestyle strategies and, when needed, medications. Diabetes treatment and management should always be personalized in collaboration with your healthcare provider, and regular monitoring and adjustment of blood glucose levels play a key role in maintaining both metabolic health and breastfeeding success. Effectively managing your blood sugar through diet, physical activity, and medications can also support a healthy milk supply and improve your breastfeeding experience.

Diet & Exercise

  • Balanced Meals & Nutrition: Include protein, whole grains, healthy fats, fruits, and vegetables; minimize sugary and processed foods.

  • Fiber & Low-Glycemic Foods: Help improve insulin sensitivity and manage blood sugar.

  • Hydration: Drink plenty of water daily.

  • Essential Nutrients: Continue prenatal or postnatal vitamins for calcium, magnesium, vitamin D, and more.

  • Physical Activity: Exercise 30 minutes most days—walking, swimming, or yoga are great options to help manage your blood sugar levels.

  • Weight Management: Maintaining a healthy weight can improve hormonal balance and milk production.

Medications

  • Metformin: If you take metformin for insulin resistance or PCOS, it's considered safe to continue while breastfeeding.

  • Insulin: There are long and short-acting medications to regulate blood sugar. It’s important to work with your healthcare provider, as your needs may change during breastfeeding.

  • Semaglutide: Recent research shows that injectable weight loss medications transfer into mothers’ milk at undetectable levels and appear to be safe for use while breastfeeding. Because these medications can reduce appetite, it is important to make sure you are still getting the nutrients you need while breastfeeding. Continuing to take a pre/postnatal multivitamin can help.

Monitoring and Support

Ongoing support is an important part of managing diabetes while breastfeeding. Regularly checking your blood sugar levels, attending routine medical appointments, and completing recommended blood tests can help ensure your treatment plan remains effective. Working with a registered dietitian nutritionist can also provide valuable guidance and reassurance, especially if you have questions about nutrition, weight changes, or blood sugar patterns.

Breastfeeding with Diabetes or Insulin Resistance

Women with diabetes, insulin resistance, and metabolic disorders may have difficulty getting pregnant and sometimes face challenges establishing a full milk supply. While many of these women will make plenty of milk, others may struggle with low milk supply. Understanding how insulin affects hormones, fertility, and breast development can help you take proactive steps to improve both breastfeeding success and long-term health outcomes.

Here are some tips to support establishing your supply:

Skin-to-Skin Contact

Spending time holding your baby skin-to-skin helps regulate your baby’s temperature, heart rate, and blood sugar while also supporting your milk supply. Skin-to-skin contact encourages early feeding cues, improves milk letdown, and can increase the hormones that support milk production.

Frequent Feedings

Breastfeeding your baby often—at least 8–12 times in a 24-hour period during the early postpartum weeks—helps establish and maintain your milk supply. Frequent milk removal sends a strong signal to your body to keep making milk.

Perfecting the Latch

A deep, comfortable latch is essential for effective milk transfer and protecting your milk supply. When your baby is well-latched, milk is removed more efficiently, which signals your body to continue producing milk.

Breast Massage and Compression

Gentle breast massage and compression during feedings or pumping can help improve milk flow and ensure your breasts empty more completely. These techniques can increase milk transfer, stimulate additional letdowns, and signal your body to produce more milk.

Hand Express After Feedings

Hand expression after feedings can stimulate your milk supply and provide small amounts of colostrum for your baby. For mothers with diabetes or insulin resistance, hand expression and postnatal colostrum collection can begin early—before supplementation is needed—to help prevent complications such as excessive weight loss, low blood sugar, or jaundice. Collected colostrum can be offered to your baby by spoon, syringe, or cup, while you continue working toward your breastfeeding goals.

Pumping

Additional milk removal through pumping can help boost milk supply, especially when paired with regular breastfeeding. Pumping after feeds or adding extra pumping sessions increases stimulation and signals your body to make more milk. This can be particularly helpful when insulin resistance or when babies are not feeding effectively at the breast.

Offer Supplementation, if Needed

Some mothers, particularly those with insulin resistance, GDM, or other metabolic conditions, may experience a delay in the onset of larger milk volumes. If this happens, temporary supplementation can ensure your baby receives enough nutrition while your milk supply builds. Collected colostrum will allow your baby to receive the benefits of your milk while reducing the need for donor milk or formula. When paired with frequent breastfeeding, hand expression, and pumping, supplementation can be a short-term tool that protects your baby’s health while supporting your long-term milk supply.

Lactation Support

Working with a lactation consultant can provide personalized guidance tailored to your body, your baby, and your goals. They can help with latch, positioning, pumping strategies, and supply concerns while offering reassurance and support. Early and ongoing lactation support can make a meaningful difference in breastfeeding success and confidence. 

Herbs

Some herbal galactagogues and lactogenic foods may contain compounds that help increase insulin sensitivity, lower blood sugar, and may help increase milk supply. While they may be a helpful addition for some parents, they work best alongside frequent milk removal, adequate nutrition, and overall metabolic support. Always check with your healthcare provider before starting herbal supplements.

What about Prenatal Colostrum Collection?

For some diabetic mothers, collecting small amounts of colostrum before birth can be a helpful and empowering option. Research suggests that diabetic mothers who practiced prenatal colostrum collection were more likely to feed their babies only breast milk during their hospital stay, reducing the need for formula supplementation.

When done after 36 weeks of pregnancy and with guidance from a healthcare provider, prenatal colostrum collection has been shown to be safe for low-risk pregnancies. Having colostrum available after birth can be especially helpful if a newborn needs extra support with blood sugar regulation or early feeding.

Breastfeeding May Reduce the Risk

Breastfeeding can be a meaningful way to support both your baby’s health and your own long-term metabolic health. Research shows that for each additional year of lactation, women with a birth in the prior 15 years had a 14–15% reduction in their risk of developing diabetes.

Closing Thoughts

Managing diabetes or insulin resistance while breastfeeding can feel overwhelming at times, but with knowledge, support, and self-care, it is entirely possible to nourish your baby and protect your own health. By understanding your risk factors, monitoring blood sugar, following a balanced diet, staying active, and seeking help from your healthcare team, you can support a healthy milk supply and enjoy a positive breastfeeding experience.

Every small step—from frequent feedings and skin-to-skin contact to prenatal colostrum collection—adds up to meaningful benefits for you and your baby. Breastfeeding, even in the face of diabetes, offers long-term protective effects, strengthens your bond, and supports your health and your child’s for years to come.

Disclaimer: Our classes and accompanying materials are intended for general education purposes and should not replace medical advice. For personalized recommendations, please consult your healthcare provider and/or lactation consultant.