Top 8 reasons to adopt a low-carb diet for polycystic ovary syndrome

Many people come to Diet Doctor because they are looking for help to lose weight or reverse type 2 diabetes. But did you know that almost all the symptoms of a common female condition called Polycystic Ovary Syndrome (PCOS) respond very well to a low-carb or ketogenic diet, too?
So what is PCOS? It’s a reproductive disorder that affects about 10 per cent of all women. The symptoms are upsetting: infrequent or absent menstrual periods, infertility, weight gain, acne, facial hair growth such as mustaches and sideburns, sometimes even losing scalp hair.
Blood tests almost always show insulin resistance and higher male hormones. Often the ovaries are found on ultrasound to be dotted with cysts.
Women with PCOS are typically treated with a cocktail of drugs: birth control pills, medications to stop male hair growth, the diabetes drug metformin to lower blood sugar, or sometimes medications for depression and anxiety. If they want to get pregnant, they are usually given fertility drugs to try to stimulate ovulation. At least 50 per cent of the time these drugs don’t work, paving the way for other techniques such as in vitro fertilization (IVF).
But there’s a simpler way to potentially get dramatic results: try a low-carb high-fat diet.
“Cutting carbohydrates to less than 20 total grams and boosting fat to 75 per cent of the diet rapidly restores periods, increases fertility, and greatly improves distressing symptoms like acne and weight gain,” says Dr. Michael Fox, a fertility specialist at the Jacksonville Center for Reproductive Medicine in Florida. Dr. Fox answers our members’ questions about using low-carb and keto diet to improve reproductive and metabolic issues.
I wish I had known about the low-carb high-fat diet for PCOS when I was diagnosed with the condition at age 19. It would have saved me years of frustration, sadness, infertility, and feeling that I was somehow defective as a woman.
“PCOS really undermines your self-confidence and happiness,” agrees Jessica Shotwell Walker, of Atlanta Georgia, who was diagnosed at 18 and struggled for almost 20 years with the condition. “I never felt like a ‘real girl’ until I was fully keto and my cycles finally became monthly. I felt ugly and unloveable for many, many years.” She has now maintained a low-carb ketogenic lifestyle for 10 years and all her symptoms have resolved. She is the picture of vitality and vigor. “I’ve never been happier, healthier, more athletic or more full of positive energy,” she says.
Here are eight reasons, backed by scientific research, why women with PCOS should try eating a low-carb ketogenic diet.
1. We may be genetically programmed, from ancient times, to thrive on low-carb or keto eating
PCOS is now known to be a complex genetic condition, found in all ethnic groups, that has been around for at least 150,000 years.
Genetic researchers believe that it once conferred a distinct evolutionary survival advantage to both women and their children in Paleolithic times, likely bestowing improved strength and disease resistance, better energy utilization, better spacing of children, and better ability to survive famines.
2. Insulin resistance and glucose intolerance improve
Despite its name, cystic ovaries are not found in all women. But almost all women with the condition – whether thin or obese – show greater insulin resistance and impaired glucose tolerance than women without the condition.
“It is insulin that really drives the whole process,” says Dr. Fox. “And insulin release is caused by carbohydrates.” In fact, a debate is ongoing that the name should be changed to “metabolic reproductive disorder.”
3. Periods and fertility rapidly return and pregnancies result
Dr. Fox has been treating thousands of women with PCOS with low-carb diets for 17 years now. He notes that within two to three months of cutting the carbs, most of his patients’ periods normalize. “As we introduced the low-carb high-fat diet, we changed the metabolic picture, and the insulin levels came down, our pregnancy rates went up to 90 to 95 per cent.”
A 2021 systematic review of RCTs concluded that dietary interventions improve PCOS symptoms, and low-carb is likely the best for fertility and restoring normal menstruation.
A 2005 pilot study on a low-carb diet for PCOS, of which Dr. Eric Westman was an author, found hormone profiles improved and two previously infertile women spontaneously conceived after adopting a ketogenic diet.
Here’s a longer post on the topic:
Trying to Conceive? Try the Better Baby Diet of Beef, Butter & Bacon
4. Excess weight is lost
Jessica Shotwell Walker lost 65 lbs (29 kg) and has kept it off for 10 years, see the image of her playing tennis to the right. I lost 10 lbs (5 kg). A number of studies are showing removing carbohydrates and replacing them with high-fat foods is the most promising treatment for obesity in PCOS.
5. Acne improves
One of the upsetting features of PCOS is a higher tendency to acne that arises not only in adolescence but persists into adulthood. In recent years, numerous studies have shown reducing the glycemic load (i.e cutting out carbohydrates that rapidly convert to sugar) greatly improves acne, whether people have PCOS or not.
While so far studies specifically focusing on treating the acne in PCOS using carbohydrate restriction are very limited, a number of testimonies
6. Anxiety and depression may ease
With an increased propensity for weight gain, acne, facial hair growth and infertility it is little wonder that women with PCOS tend to have greater incidence of anxiety and depression than women without the condition.
While research is still very limited around the relationships between our genes, the foods we consume, and our mental health,
7. Bulimia may improve or resolve
Many studies have found that the incidence of bulimia is greatly increased among women with PCOS. In the past this finding was used to dismiss women with PCOS as having psychiatric problems that contributed to their reproductive disorder, concluding that the bulimia came first and the PCOS later.
The theory is that genetic inability to handle an abundance of glucose and carbs fuels a cycle of insulin and glucose spikes and crashes, which fuel carbohydrate cravings and purgings.
Scientific research is lacking, but anecdotal evidence shows binge-eating disorders can be helped by the ketogenic diet, which reduces cravings and greatly reduces the bulimic tendencies. “With keto, you lose your cravings for starches and sugar,” posted one woman in a bulimia discussion thread online.
8. Improved pregnancies and reduced risks of health problems after menopause with ketogenic diet
Most of the focus on women with PCOS is in the adolescent and early adult years when infertility, acne and weight gain are the prominent features. But women with PCOS who get pregnant have much higher rates of complications during pregnancy including gestational diabetes (a disorder of carbohydrate intolerance), pre-eclampsia (high blood pressure during pregnancy) and bigger babies over 9 lbs (which are a risk for Caesarean deliveries and an independent risk for future diabetes.)
Moreover, women in menopause, who had PCOS, have higher rates of cardiovascular disease, high blood pressure, and type 2 diabetes.
And here is a surprising bonus: male relatives may benefit, too
Think that only women have the genes? Not so. Recent genetic findings show that male relatives – fathers and brothers — of women with PCOS also have a tendency to increased insulin resistance, type 2 diabetes, and cardiovascular disease.
An interesting finding is that the only apparent outward symptoms of male relatives of women with PCOS are early male pattern baldness before age 30 and excessive body hair.
—
Anne Mullens
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