If you’re pregnant, nursing, or expecting to be, you might be wondering if Keto is healthy for these pivotal periods. Is Keto safe for pregnancy?
It’s worked for many moms, but that doesn’t mean there aren’t risks. And it also doesn’t mean that low-carb diets will work for every expecting mother.
This article will help provide some clarity. By the end, you’ll be able to decide if Keto makes sense for your prenatal and postnatal journey.
What Is Keto?
Keto is short for the Keto diet. The Keto diet (or ketogenic diet) is a low-carb eating plan in which you eat 55-70% of your calories from fat, 20-35% from protein, and under 10% from carbohydrates.
By keeping carbs low, you send a powerful fat-burning signal to your cells. This signal—triggered by low blood sugar and insulin levels—breaks apart body fat and sends it to your liver where it’s burned to make energy and ketones.[*]
Remember this point about Keto, appetite, and food intake. It will come up later when we talk about prenatal and postnatal nutrition.
Proper Nutrition During Pregnancy and Nursing
While pregnant or breastfeeding, a woman needs more of everything. (Love, hugs, understanding, etc.). And nutrition-wise, she needs more:
Let’s review these individually.
To be clear, these are just rough guidelines. A woman’s caloric needs will vary based on her age, weight, activity levels, genes, and a variety of other factors. The important thing is to eat more, not less.
This means that pregnant and nursing women should focus on protein first in their macro strategy. The bare minimum is 60 grams per day, but 100 grams is a better target for active women. High-protein foods like meat, fish, eggs and whey protein should be dietary staples, Keto or otherwise.
Pregnant women, you might be aware, need more folate. Folate helps prevent neural tube defects in the fetus, and it’s why prenatal vitamins contain a big hit of folic acid. (Note: green leafy vegetables are excellent dietary sources of folate).
- Vitamin A
- Vitamin D
- Vitamin B6
- Vitamin B12
- Iron (during pregnancy only)
There’s also evidence that choline (from eggs and liver) and omega-3 fatty acids (from fish and fish oil) aid brain development in the growing fetus.[*][*] Pregnant women should strive to get enough of these nutrients too.
Possible Benefits of Keto During Pregnancy
There isn’t much clinical evidence on Keto for pregnant or nursing women. We have anecdotal evidence, and we know that Keto can help other populations, but the jury is still out on this topic. Let's take a look at some potential benefits of Keto during pregnancy.
Avoiding refined sugar
If you want to maximize your health, it pays to minimize your intake of added sugar. Added sugar has been linked to most modern diseases—most notably obesity[*]—and maternal obesity may lead to bad outcomes for the fetus.[*]
Along with the Paleo diet, the Mediterranean diet, and a few other eating plans, a whole foods Keto diet is devoid of added sugar. This is undeniably good for both mother and child.
Blood sugar control
About 1 in 6 women suffer high blood sugar levels during pregnancy.[*] This is called gestational diabetes.
By limiting carbs, Keto restricts the foods that spike blood sugar the most. And the Keto diet, it’s been shown, can be an effective treatment for a similar metabolic disorder called type 2 diabetes.[*]
The bottom line is that Keto may help with gestational diabetes, but more research is needed.[*]
Risks of Keto During Pregnancy and Nursing
And here are some possible concerns about pre or postnatal Keto.
Undereating can stunt the growth of the fetus, reduce breast milk quality, and impair mom’s energy levels.[*]
Since a Keto diet suppresses hunger, it increases the risk of accidental calorie restriction. Because of this, pregnant and nursing women should make a conscious effort to eat extra calories—especially protein calories—on Keto.
Why? Because milk production uses up lots of glucose, the body gets confused, and its ability to regulate ketone levels goes out the window. This doesn’t happen to everyone, but it’s something to watch out for.
- Humans aren’t mice. We respond to ketogenic diets differently.
- The mice were fed refined-mouse chow, high in inflammatory omega-6 fats.
Finally, a ketogenic diet has been shown to improve the sex hormone profile in women with PCOS.[*] So in some cases, this could be listed as a benefit.
Tips for Keto During Pregnancy
If you want to try Keto during pregnancy, consider these tips:
- Don’t be strict. Allow some carbs in your diet, especially if you’re breastfeeding. Lean towards the higher end of 10% carbs per day, and perhaps go higher. This is not the time to ruthlessly cut carbs and calories.
- Eat enough calories. Don’t stuff yourself like a starving hyena, but be careful not to starve yourself either. Track your meals with the Carb Manager app to confirm you’re eating enough on Keto.
- Limit the fasting. An overnight fast is fine, but anything longer than 12 or 13 hours may increase the risk of calorie restriction. Try intermittent fasting another time.
- Get enough protein. You’ll also want to track protein intake. Shoot for around 100 grams per day (maybe more if you’re active) to support pregnancy and breastfeeding.
- Nutrients, nutrients, nutrients. You need more of everything. Take a well-formulated prenatal multivitamin, supplement omega-3 fatty acids[*], and eat protein-rich, nutrient-dense foods like meat, fish, eggs and low-carb veggies.
Is Keto Safe for Pregnancy and Nursing?
Scientists still aren’t sure how Keto affects pregnant and nursing women. Because of this, you should proceed cautiously.
Along with following the above tips, work with your doctor to monitor your situation. If things start to look or feel off, consider bumping up your carbs by 50 to 100 grams per day.
Many expecting women have flourished on low-carb diets, but everyone is different. Listen to your body (and your doctor) to set yourself up for a safe and healthy pregnancy.