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Keto Diet for Women Over 40

In keto, fat becomes your best friend.

Sound crazy? Maybe it does, but it’s true. In the keto diet, you can enjoy eating bacon, avocado, cheese, and many other high-fat foods while losing weight.

Keto is a tasty and physically satisfying diet. Perhaps that’s why it’s one of the trendiest diets.

But is it effective and safe for women over 40?

What Is the Keto Diet?

The ketogenic diet (or keto) is a high-fat diet that has moderate protein and is low in carbohydrates. It’s different from other low-carbohydrate diets because of the high-fat content.

A typical breakdown of the keto diet is the following, showing percentages of the total calorie intake. 

Fats 70-80%

Proteins 10-20%

Carbohydrates 5-10%

What does this mean?

Think about it like this: if you choose to eat only bacon as your form of fat, you could eat 57 thin slices of bacon a day. You could also eat some protein and a tiny amount of carbs (about one fruit and a medium sweet potato).

Compared to a regular diet, the distribution of macronutrients is significantly in favor of fat. But the number of carbohydrates typically consumed in this diet is very low, normally only from 20 to 50 grams a day.

How Does Ketogenic Dieting Work?

As a result of the low carbohydrate intake, the body enters a metabolic state called ketosis, where your body burns fat instead of carbohydrates for energy. This state of ketosis creates ketones, which can be used as an energy source for the body.

Symptoms of ketosis include thirst, dry mouth, frequent urination, and decreased hunger and appetite.

Read the last part carefully: decreased hunger and appetite. That makes the keto diet easy to follow in the short term.

Curious about the keto diet? Let’s dig further into the pros and cons of the keto diet.

Keto for Women Over 40

As noted above, this is a high-fat, moderate-protein, and low-carb diet. The high-fat content sets it apart from other low-carbohydrate eating plans.

What Foods Can You Eat in the Keto Diet?

MeatBeef, chicken, turkey, veal, pork, buffalo meat, etc
Cured meatsBacon, sausage, ham, etc
Fish and seafoodSalmon, tuna, trout, mackerel, shrimp, scallops, octopus, calamari, etc
EggsEggs, egg products, and foods made with eggs
CheeseUnprocessed cheese like cheddar, cream, blue, and mozzarella
FatButter, cream, ghee
OilsCoconut oil, olive oil, grape-seed oil, and avocado oil
AvocadosAll types
NutsAlmonds, Brazil nuts, walnuts, flax seeds, pumpkin seeds, and others
SeedsChia, sesame, and others
VegetablesAll low-carb veggies: green leafy vegetables, tomatoes, onions, peppers, etc
CondimentsSalt, pepper, herbs, and spices

What Foods do You Need to Limit?

The most important aspect in this eating plan is to meet the macronutrient goals. Remember that to reach ketosis, you will need to limit sugar and carbohydrates.

Sugary FoodsCookies, ice cream, cake, candy, jam, jelly, and other preserves with added sugar, canned fruit packed in sugar, pastries, donuts, milkshakes, and ready-to-eat cereals
Sugary beveragesSoda, energy drinks, fruit juice, etc
GrainsBread, rice, pasta, cereal, and all types of grains, including whole grains
FruitsAll, except small portions of berries
Beans and LegumesBlack beans, kidney beans, lentils, peas, chickpeas, and all beans and legumes.
Root vegetablesPotatoes, malanga, sweet potatoes, carrots, and others
Condiments with added sugarBarbecue sauce, ketchup, honey mustard, teriyaki sauce, etc
AlcoholBeer, wine, mixed drinks

Sample Meal Plan


  • Avocado and eggs
  • Bacon and cheese egg omelet



Keto diet pros: feeling less hungry

Can You Drink Alcohol on the Keto Diet?

Alcohol is permitted but only in pure forms of alcohol like gin, tequila, rum, whiskey, and vodka. These are low in carbs and therefore acceptable.

These beverages may be consumed alone or with low-carb mixers to enhance the flavor. Keto-approved mixers include seltzer, sugar-free tonic water, diet soda, and Crystal Light drink mix.

Non-keto-friendly beverages include those made with sugar or other carbs, for example, margarita, bloody mary, sangria, piña colada, vodka with orange juice, rum and Coke, Smirnoff Ice, and regular beer.

Keto Diets Pros and Cons

Keto Suppresses the Appetite and Enhances Satiety

As mentioned before, ketosis is the aim of the keto diet and results in decreased hunger and enhanced fullness. So, naturally, women following the keto diet find it easier to eat less.

In addition, dieters on this plan feel less hungry because the small quantity of carbohydrates consumed can potentially result in decreasing the appetite-stimulating hormones insulin and ghrelin.

Awesome, right?

Weight Loss

Studies suggest that in the short term the keto diet produces rapid weight loss while preserving muscle mass.

This is ideal for women over the age of 40 because muscle loss is one of the reasons middle-age women gain weight easier than they did when they were younger.

Research has also found that in a period shorter than six months, low-calorie, low-carbohydrate diets (like keto) result in greater weight loss than low-fat diets that are also low-calorie and higher in carbohydrates.

Keto diet pros and cons

At 6, 12, and 24 months, weight loss on a low-carb diet is comparable to other diets.

Considering that different diet approaches can work on short- and long-term weight loss, I advise thinking about your personal preferences and health when selecting an eating style.

Heart Health

A report published in the American College of Cardiology Journal concludes that ketone bodies can help protect the heart in people with cardiovascular disease. 

Other studies showed significant improvements in triglycerides with low-carbohydrate diets. However, the difference was not significant at 24 months.

The review authors pointed out that while participants followed the keto diet earlier in the studies, adherence to the diet decreased over time. For this reason, it’s difficult to determine the true impact of a keto diet on lipids, cholesterol, and overall heart health.

It’s important to remember that the keto diet is low in fiber, one of the most important components for good cardiovascular health. It’s also very high in fat, which is not generally recommended for heart health. Therefore, keto for women over 40 might be better as a short-term weight loss solution.

Blood Glucose

The ketogenic diet may be beneficial for type 2 diabetics to help them maintain glucose levels within a normal range because it lowers carbohydrate intake.

Early research has found that keto diets can help control the level of HbA1c – the glucose traveling in the blood – during a three-month period.

But, keep in mind that there are not enough studies to scientifically conclude that the keto diet is beneficial for people with diabetes.


Because of the minimal amount of carbohydrates in the keto diet, people taking medication that lowers blood sugar must consult their healthcare provider before starting on this eating plan. 

The role of these medications is to help the body process carbs. But, if there is medication in the body but not enough carbohydrates, the blood sugar can lower to a dangerous level, resulting in a medical emergency with potentially serious health consequences, including death.

Brain Health

Research has indicated that a keto diet may improve neurological conditions like Alzheimer’s disease and Parkinson’s disease.

Digestive Health

Some people on keto experience GI issues, including diarrhea, constipation, vomiting, and abdominal pain.

Dieters following this plan eat a very high amount of fat, and some people will have issues digesting it, especially if they had a moderate intake before starting the diet. The problem would be expected to pass, but this is one of the reasons that keto is not for everybody.

In addition, a 2019 study found that diets that are high in fat can cause inflammation of the GI tract (your intestines), causing a decrease in the good bacteria that are important for your overall health. 

Other studies show the opposite, so there is some evidence that this eating plan might have good effects on gut bacteria.

The impact of the keto diet on digestive health could be an issue for women transitioning to menopause, because the hormonal changes associated with this stage of life can cause stomach issues.

Nutrition Deficiencies

As we have seen the keto diet is very restrictive, with a minimal amount of carbohydrates and large amounts of fat. Because of this restriction, it cuts back on foods that are high in fiber, vitamins, and minerals.

As a result, keto followers are at higher risk for nutritional deficiencies. For that reason, it’s likely that you will need to take fiber supplements to relieve constipation and multivitamins with minerals to prevent deficiencies. 

Some of the most common nutrient deficiencies include vitamins A, C, and K, and folate.

In the long term, nutritional deficiencies from this eating style can lead to kidney stones, liver disease, and other diseases.

Keto Diet and Social Life

If you’re following a keto diet, social gatherings might be more challenging. On the other hand, because this diet has become so popular, it might be easier to find keto-friendly foods.

Keto Flu

One of the ketogenic diet cons is what’s known as the keto flu, an unpleasant side effect that you might experience when you start due to the low intake of carbohydrates. This can include nausea, vomiting, headaches, fatigue, dizziness, insomnia, difficulty in exercise tolerance, and constipation.

Generally speaking, these symptoms resolve in a few days or weeks and can be minimized by drinking plenty of fluid and consuming enough electrolytes.

Is the Keto Diet Safe for Women Over 40?

Before you commit to a keto diet, there are a few things to consider. 

If you’re taking medication that lowers your blood glucose, like insulin, it’s best that you follow this diet under the supervision of a registered dietitian and a physician.

It’s very likely that your physician will adjust your medication to ensure you don’t experience low blood glucose.

Also, this eating plan is not recommended for those with the following chronic diseases:

In the long term, the keto diet can lead to kidney stones and liver disease, and  the risks of consuming such a high-fat diet on heart health are not well studied.

My Personal Opinion as a Nutrition Expert

Overall, as a doctor in clinical nutrition, I believe in achieving a well-balanced and healthy diet in the long term. However, I can see how the keto diet can help many reach their goals.

It should be noted, though, that this should be a short-term solution with a plan to achieve a better nutrition balance over time.

If you have more questions about the keto diet’s pros and cons and whether or not it is a good choice for you, check with your health care professional.

A registered dietitian can also create a healthy eating plan personalized to your needs. Just select a healthcare professional who aligns with your preferences and goals.

To explore other diet options, check out some of our other blog posts: 

Keto vs Vegan Diet 

Keto vs Mediterranean Diet 

Intermittent Fasting for Women Over 40

Anti-Inflammatory Diet Menu

Find Food Freedom

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