Can You Become Postpartum Lactose Intolerance After Pregnancy?

Hello dear, Mom you have Feel yourself unable to tolerate dairy after giving birth? You’re not alone. Many new moms develop symptoms of Postpartum Lactose Intolerance After Pregnancy. Foods like milk, cheese, and ice cream that you used to enjoy without issue may now leave you feeling bloated, gassy, or running to the bathroom.

This happens because pregnancy can decrease your levels of the enzyme lactase, which is needed to properly digest lactose, the sugar found in dairy products. While lactose intolerance can be unpleasant and limiting, don’t worry – you can take steps to manage it!

Here we’ll talk about what causes lactose intolerance after pregnancy, how to tell if you have it, and tips to control your symptoms and still get the nutrition you need as a new mom.

lactose intolerance after pregnancy
lactose intolerant while pregnant

What is lactose intolerance?

Lactose intolerance is the inability to fully digest lactose, the main carbohydrate in dairy products. This leads to gastrointestinal symptoms after consuming dairy foods and beverages.

lactose intolerant occurs when there is not enough of the enzyme lactase in the small intestine. Lactase breaks down lactose into glucose and galactose, which can be absorbed into the bloodstream. Without adequate lactase, undigested lactose travels to the colon where it ferments, causing gas, bloating and other symptoms.

How do I know if I’m Postpartum lactose intolerant?

Here are some signs that may indicate you are lactose intolerant:

  1. Bloating, abdominal cramping, or gas after consuming dairy products – Lactose intolerance causes indigestion and gas production when undigested lactose ferments in the colon. Bloating, cramping, and flatulence can start 30 minutes to 2 hours after eating dairy.
  2. Diarrhea or loose, watery stools – The undigested lactose creates an osmotic effect in the colon, drawing fluid into the intestines. This can result in urgent, loose bowel movements after dairy consumption.
  3. Nausea or vomiting – The buildup of gas and fluid in the colon can also trigger nausea, and sometimes vomiting, after eating or drinking dairy products.
  4. Constipation – For some, the dehydrating effects of diarrhea from lactose intolerance can later cause constipation.
  5. Stomach rumbling – The indigestion, gas and diarrhea caused by lactose can lead to noisy gurgling or rumbling sounds from the gastrointestinal tract.
  6. Fatigue – The inflammation and discomfort of lactose intolerance can exert a toll, leaving you feeling tired or sluggish.
  7. Headaches – Some people experience headaches soon after consuming lactose-containing dairy products.

The severity of symptoms depends on the amount of lactose consumed and your individual tolerance levels. Keeping a food journal can help you determine if dairy is linked to your digestive problems.

Can Pregnancy Make You Lactose Intolerance?

Yes, pregnancy can cause or worsen lactose intolerance. There are several reasons why “lactose intolerance after pregnancy” or “lactose intolerant during pregnancy” commonly occurs:

  1. Hormonal Changes – Increased levels of progesterone and estrogen during pregnancy can slow down digestion and gut motility, making it more difficult to properly digest lactose.
  2. Morning Sickness – Vomiting and nausea during early pregnancy can damage the lining of the small intestine, which reduces production of the lactase enzyme needed to break down lactose.
  3. Calcium Demands – Higher calcium requirements during pregnancy may overload the body’s lactose digestion capacity.
  4. Digestive Changes – The metabolic demands of pregnancy shift the digestive system, which can reveal an underlying lactose intolerance.
  5. Genetics – Some women have a genetic predisposition to lactose intolerance that expresses itself during pregnancy.

lactose intolerance that develops during pregnancy is often temporary. After giving birth, hormones normalize and digestive function improves allowing many women to tolerate dairy again. However, some women remain lactose intolerant postpartum if damage to the small intestine persists.

Suddenly lactose intolerant during pregnancy

It’s not unusual for pregnant women to suddenly develop lactose intolerance symptoms even if they had no issues with dairy before. Here are some potential reasons:

  1. Natural Drop in Lactase – Lactase levels can naturally decline as pregnancy progresses, making it harder to digest lactose
  2. Hormone Sensitivity – Some women become extra sensitive to normal fluctuations in digestive hormones like progesterone, causing intolerance symptoms.
  3. Morning Sickness Effects – Vomiting, reflux and nausea during pregnancy can damage the intestinal lining needed for lactase production.
  4. Slowed Digestion – Common digestive changes like reduced gastric emptying and gut motility contribute to lactose malabsorption.
  5. Calcium Overload – Ramping up calcium absorption to meet fetal needs may overwhelm the lactose digestion capacity.
  6. Gut Flora Changes – Shifts in gut bacteria vital for fermenting undigested lactose can promote intolerance symptoms.

intolerance that starts during pregnancy is often temporary. After giving birth, hormone levels normalize, gut function improves, and symptoms frequently resolve. But some women do remain lactose intolerant postpartum. Talk to your doctor if symptoms don’t improve within 6-12 months after delivering your baby.

Can Pregnancy Cause Lactose Intolerance?

Pregnancy itself does not directly cause permanent lactose intolerance, but it can reveal an underlying predisposition or temporary inability to digest lactose.

Here are some ways pregnancy can Support lactose intolerance:

  1. Accelerated Transit Time – Increased gastrointestinal transit due to progesterone can reduce time available to absorb lactose.
  2. Gut Inflammation – Common conditions like reflux and constipation irritate the gut, damaging lactase-producing cells.
  3. Vomiting and Reflux – Stomach acids from morning sickness and reflux erode the intestinal villi housing lactase enzymes.
  4. Hormone Changes – Progesterone, estrogen, and HPL slow motility and digestion needed for lactose breakdown.
  5. Calcium Needs – Ramping up calcium absorption stresses the lactose digestion system.
  6. Genetic Predisposition – Pregnancy may activate a genetic tendency toward lactose deficiency.

Symptoms of Postpartum lactose intolerance after pregnancy

Here are some common postpartum lactose intolerance symptoms that may occur during pregnancy:

  • Bloating and abdominal distension – The inability to digest lactose leads to gas production and belly bloating after consuming dairy products. The growing uterus exacerbates abdominal discomfort.
  • Diarrhea – Undigested lactose draws fluid into the intestines, resulting in loose, watery stool with urgency and frequency.
  • Cramps and pain – The abdomen may cramp and hurt due to spasms from gas, fluid shifts, and irritation in the colon.
  • Excessive gas – Gassiness and flatulence frequently accompany lactose intolerance as bacteria in the colon ferment the undigested lactose.
  • Nausea – Some women feel nauseous after eating dairy due to the indigestion, gas and abdominal discomfort caused by lactose intolerance.
  • Vomiting – In some cases, the nausea experienced with lactose intolerance progresses to vomiting, especially in women already suffering from morning sickness.
  • Constipation – For some, the dehydrating effects of diarrhea lead to secondary constipation.
  • Fatigue – Discomfort, poor nutrient absorption, and inflammation can contribute to exhaustion.

Symptoms usually start 30 minutes to 2 hours after ingesting lactose-containing dairy products. Be sure to consult your doctor if you suspect lactose intolerance during pregnancy.

Can you become lactose intolerant while pregnant?


Yes, it is possible to develop lactose intolerance for the first time during pregnancy. There are several reasons why:

  • Hormone Changes – Increased progesterone and estrogen can slow gastric emptying and intestinal motility, hampering lactose digestion.
  • Morning Sickness – Vomiting and reflux during pregnancy can damage the intestinal villi that produce the lactase enzyme needed to break down lactose sugar.
  • Calcium Needs – Ramping up calcium absorption stresses the lactose digestion system and may reveal an underlying intolerance.
  • Reduced Lactase – Some women have a natural drop in lactase levels as pregnancy progresses, making lactose digestion more difficult.
  • Genetic Predisposition – The metabolic changes of pregnancy can uncover a genetic tendency toward lactose deficiency.
  • Gut Permeability – Common pregnancy digestive issues like constipation and reflux promote leaky gut, allowing undigested lactose into bloodstream.
  • Slowed Transit – Progesterone and relaxin slow GI motility, reducing time available to absorb lactose before it reaches colon.

How to diagnose lactose intolerance?

Lactose intolerance can be diagnosed through:

  • Hydrogen Breath Test – Measures hydrogen in breath after ingesting lactose. Elevated levels indicate malabsorption.
  • Lactose Tolerance Test – Involves consuming lactose and measuring blood glucose. Low rise indicates poor digestion.
  • Stool Acidity Test – Checks pH of stool after lactose intake. Increased acidity signals undigested lactose.
  • Genetic Testing – Can identify variants linked to congenital lactose intolerance.
  • Elimination Diet – Removing dairy for 2-4 weeks then reintroducing while monitoring symptoms.

What is the treatment for lactose intolerance?

  • Lactose-free diet – Eliminate milk, cheese, yogurt, ice cream, and hidden dairy ingredients.
  • Lactase supplements – Replace the missing lactase enzyme needed for digestion.
  • Dairy alternatives – Choose lactose-free milk and yogurt made from soy, almond, coconut, etc.
  • Limit portions – Consume small amounts of dairy at one time if tolerated.
  • Probiotics – Can help support digestion and gut health.
  • Check labels – Watch for lactose additives like milk solids in processed foods.

Lactose-Free Diet for Pregnant Women

A lactose-free diet can provide key nutrients for pregnancy without triggering intolerance symptoms:

  • Drink lactose-free milk – Lactose-free cows’ milk is a direct swap for regular milk. Also try nut and seed milks fortified with calcium and vitamin D.
  • Eat natural cheeses – Hard, aged cheeses like cheddar and Parmesan contain less lactose than soft cheeses. Have in moderation.
  • Include probiotic yogurt – Look for dairy-free coconut or almond yogurts. Some women tolerate small amounts of Greek yogurt.
  • Get protein from eggs, fish, legumes – Eggs, salmon, tuna, beans and lentils provide protein without the lactose.
  • Fill up on fruits and veggies – All produce is naturally lactose-free. Focus on dark leafy greens for calcium.
  • Enjoy lactose-free smoothies – Blend lactose-free milk and yogurt with fruit for a nutrition boost.
  • Read labels for hidden lactose – Soup mixes, breads, salad dressings and sauces often contain added milk ingredients.

Tips for control Lactose Intolerance

  • Take lactase pills when consuming dairy to aid digestion
  • Gradually reintroduce small amounts of dairy like 4 oz milk or 1/4 cup shredded cheese
  • Opt for lactose-free versions of milk, ice cream, cream cheese, sour cream, etc
  • Limit portions to 1 cup milk, 6 oz yogurt, 1-2 oz hard cheese per sitting
  • Have dairy with other non-dairy foods like cereal, fruit, crackers
  • Avoid dairy 2 hours before or after intense exercise
  • Try probiotic yogurts and kefir, which contain enzymes to digest lactose
  • Check labels closely and avoid products listing milk solids, whey, etc as ingredients

Can You Become Lactose Intolerant After Pregnancy?

Lactose intolerance itself does not directly affect the health of the pregnancy or the baby. However, the dietary restrictions imposed by lactose intolerance can potentially lead to nutritional deficiencies that impact both mother and baby.

Some key points:

  • Inadequate calcium intake due to avoiding dairy may increase the mother’s risk of developing preeclampsia and negatively affect the baby’s bone development.
  • Deficiencies in protein, vitamin D, B vitamins, and other nutrients can occur if dairy products are strictly limited without replacing them in the diet.
  • It’s important for lactose intolerant mothers to discuss their diet with their healthcare provider and come up with a nutrition plan that provides all the recommended nutrients for pregnancy through non-dairy foods, supplements, and lactose-free dairy alternatives.
  • With proper medical guidance and careful attention to diet, lactose intolerance does not have to adversely affect a healthy pregnancy. The key is making sure nutritional needs are met, especially calcium, protein and vitamin D, through a variety of lactose-free sources.
  • Babies born to lactose intolerant mothers develop normally, although there may be a hereditary predisposition to lactose intolerance later in life.

lactose intolerance itself is not harmful, but nutritional deficiencies resulting from dietary restrictions can potentially impact mom and baby if not managed correctly under medical supervision. A well-planned lactose-free diet can support a healthy pregnancy.

Does Breastfeeding Worsen or Improve Lactose Intolerance Symptoms?

The effect of breastfeeding on lactose intolerance symptoms can vary from woman to woman:

  • Some women notice an improvement in their ability to tolerate lactose while breastfeeding. Potential reasons include:
  • Drop in progesterone levels after pregnancy which speeds transit time
  • Increased gut motility and intestinal adaptation
  • Resolution of pregnancy-related nausea and vomiting
  • Changes in gut flora that help break down lactose
  • However, for other women, lactose intolerance symptoms worsen or return during breastfeeding for several reasons:
  • Fluctuations in estrogen levels throughout lactation
  • Increased metabolic demands of milk production
  • Loss of calcium through breastmilk, raising needs
  • Overproduction of milk exacerbating digestive issues
  • In general, the rise and fall of hormones along with increased calcium needs make lactose intolerance unpredictable during breastfeeding.
  • It’s important for lactose intolerant moms to work closely with their healthcare provider and dietitian to manage symptoms and ensure adequate nutrition while breastfeeding.
  • Dietary modifications, lactase supplements, temporary lactose restriction, and treatment of oversupply may help control symptoms.

lactose intolerance could improve for some moms while breastfeeding but worsen for others. Careful management is needed to control symptoms and avoid nutritional deficiencies.

Read Also Elderflower in Pregnancy Uses, Side Effects, Type and Everything You Need to Know

Related FAQs of Lactose intolerant during pregnancy

Is Lactose Intolerance different than a milk allergy?

Yes, lactose intolerance is not the same as a milk allergy or dairy sensitivity. Lactose intolerance stems from insufficient lactase enzyme levels. A milk allergy is an immune reaction to milk proteins like casein.

Can Lactose Intolerance Develop During Pregnancy?

Lactose intolerance can arise in pregnancy due to hormonal changes, increased calcium needs, gut inflammation from reflux and vomiting, and other factors unique to pregnancy. For most women it’s temporary, but some remain lactose intolerant postpartum.

Can you all of a sudden become lactose intolerant?

It’s possible to suddenly develop lactose intolerance as an adult, even if dairy products were previously tolerated. Pregnancy, gastrointestinal illness and certain medications can trigger abrupt lactose intolerance by damaging gut lining cells that produce lactase.

Are There Any Specific Hormonal Changes That Contribute to Lactose Intolerance After Pregnancy?

Yes, fluctuations in progesterone, estrogen and human placental lactogen during and after pregnancy play a role in lactose intolerance by:

1. Slowing gastric emptying and intestinal motility
2. Increasing inflammation and intestinal permeability
3. Altering gut flora responsible for lactose fermentation
4. Affecting calcium absorption and vitamin D activation

As hormones normalize postpartum, lactose tolerance often improves. But some women remain intolerant.

Can mother become lactose intolerant while breastfeeding?

Lactose intolerance can arise or worsen during breastfeeding due to:

1. Hormonal fluctuations
2. Increased calcium demands
3. Hypoestrogenism affecting gut motility
4. Stress on digestion from oversupply of milk
5. Consumption of dairy to boost milk supply

consult with a doctor and registered dietitian can help manage symptoms and ensure proper nutrition while breastfeeding with lactose intolerance.

Conclusion on Lactose Intolerance After Pregnancy

Lactose intolerance is common during pregnancy and the postpartum period due to hormonal changes, increased calcium needs, gut inflammation, and other factors. Symptoms like bloating, diarrhea and cramping after dairy can develop even if tolerance is normal.

Fortunately, lactose intolerance arising in pregnancy is often temporary and resolves after delivery. Following a lactose-free diet, taking supplements and slowly reintroducing dairy can help manage symptoms.

consult with a healthcare provider ensures moms get the nutrition they require, especially calcium and protein, while lactose intolerant. With the right dietary modifications, lactose intolerance does not have to affect a healthy pregnancy or breastfeeding experience.

Leave a Comment