The Best Diet for Polycystic Ovary Syndrome

PCOS is one of the most common hormonal disorders in the developed world.

In fact, it’s thought to affect almost 7 percent of pre-menopausal women in the U.S. (1)

But there is surprisingly limited information on how to treat it naturally. This article explores the best diet for PCOS, as based on scientific evidence.

What is PCOS (Polycystic Ovary Syndrome)?

what-is-PCOSPCOS (Polycystic ovary syndrome) is a condition characterized by hormonal imbalances in women.

Specifically, itís an imbalance in the amount of male hormones (or androgens) produced by the ovaries.

While the term polycystic ovary means “to have multiple cysts in the ovaries,” the development of cysts isn’t actually necessary for the diagnosis of PCOS.

Unfortunately there is no known cure yet, and the cause is unknown. However, genetic predisposition coupled with inadequate diet is thought to be a major driver (2).

Summary: PCOS is characterised by an imbalance of male hormones in women. It is likely a genetic condition triggered by diet.

PCOS Symptoms

symptoms-of-pcos-weight-gainExcessive androgen secretion appears to be responsible for most PCOS symptoms.

Most will experience one or more of the following symptoms:

  • Irregular or absence of menstrual periods
  • Excess body or facial hair, indicative of increased androgen levels
  • Cysts on one or both ovaries
  • Uncontrollable weight gain
  • Infertility
  • Sleep apnea
  • Insulin resistance and associated metabolic problems

Summary: PCOS has a cluster of symptoms related to increased male hormone levels.

PCOS and Diet: Insulin and Weight Loss are Key

The most effective eating pattern for PCOS is one that promotes weight loss and reduces levels of the hormone insulin (3, 4).

This is because PCOS coupled with weight gain drives insulin resistance. That’s why PCOS dramatically increases risk of type 2 diabetes and other metabolic health conditions (5, 6).

Additionally, high insulin levels appear to upset regulation of the sex hormones. This worsens PCOS in a viscous cycle (7, 8).

Whichever diet or eating pattern helps you to successfully lose weight and lower insulin will have the best possible outcomes. Assuming you have been unsuccessful following a low-fat diet (which can work), here are several alternatives:

Low Carb Diets

low-carb-diet-for-pcosA low carb diet is an eating pattern where carbs make up roughly 30 percent or less of your energy intake.

By comparison, the average American diet is around 60 percent carbs or more than 300 grams per day. Reducing carbs tends to equal a higher protein intake, shown to keep you feeling full for longer and reduce total calories consumed through the day (9, 10).

Thatís why low carb diets can work well for weight loss when not counting calories. Strategies to reduce appetite are even more important for PCOS patients, as studies indicate their levels of the ďhunger hormoneĒ ghrelin are dysregulated (11).

Low carb diets are also very useful for treating insulin resistance and type 2 diabetes. But note those taking metformin will need to speak with their doctor first.

Ketogenic Diet

A ketogenic diet is a very low carb, high fat eating pattern (as opposed to higher protein).

Consistently eating this way produces ketones, which serve as the main energy supply for your body instead of carbs. This makes it especially useful for reducing insulin levels and weight loss.

In a small study of 5 women with PCOS, a ketogenic diet reduced body weight by an average of 12 percent after 24 weeks. There was also significant improvements in PCOS hormones, and a 54 percent reduction in fasting insulin levels (12).

Itís promising, but incredibly difficult to stick with long-term.

Very Low Calorie Diets (VLCD) and Diet Pills

A very low-calorie diet is an intake of 800 calories per day or less.

One study showed that it causes significant weight loss in women with and without PCOS after 12 weeks (13).

Problem is that VLCDs are designed for rapid weight loss in the short term, and are not sustainable. Additionally, weight loss from severe calorie restriction severely harms your metabolism, ironically making you regain weight more easily.

One study has also shown that a diet pill called Orlistat helped women with PCOS lose weight over a 24 week period (14). However, similarly to VLCDs, a diet pill is not a sustainable solution. Unfortunately there are no short-cuts.

Summary: The best diet for PCOS should promote weight loss and reduce insulin levels. A low carb diet is the best solution if low fat has not worked for you, with a ketogenic diet the more extreme option. VLCD and diet pills will not work long-term.

PCOS and Dairy Foods

dairy-milk-and-pcosAside from overall eating patterns, there are some common food concerns of PCOS patients that should be clarified. One of the main issues is dairy consumption.

Some observational studies have linked dairy intake with increased risk of PCOS, especially low-fat dairy products (15, 16).

In contrast, full-fat dairy has been linked to a reduced risk of infertility, which suggests a protective effect on PCOS (17). Itís really unclear at this stage, and we cannot draw any conclusions from observational studies.

It may be that those who drink more dairy also eat more junk food, which is why that trend was observed. If low-fat dairy is indeed bad for PCOS, and full fat dairy is not, itís likely because low-fat dairy and other ďdietĒ products have significantly more sugar (18).

In any case, dairy-free is certainly worth a try if other changes have not helped. With a wholesome diet, dairy is not essential.

Summary: Some studies have linked dairy consumption with an increased risk of PCOS, particularly low-fat dairy. However there is no conclusive evidence yet.

PCOS and Soy

soy-and-pcosSoy products are made from soybeans, the protein-rich seeds of the soy plant. Soybeans are rich in

Soybeans are rich in phytoestrogens, a compound so similar to the human estrogen hormone that it can disrupt its function (19).

The effects of soy on hormone-sensitive conditions like endometrial and ovarian cancer are uncertain, which also leaves a question mark for those with PCOS.

Both observational studies and clinical trials have found those with a high soy intake have no greater risk of endometrial cancer, which is encouraging (20, 21).

There was also a clinical trial that showed phytoestrogen supplementation for 3 months had no negative effects, and may even have benefits for PCOS patients (22).

There isnít much evidence to go by, but it seems moderate soy consumption is likely safe in a diet for PCOS. In saying that, it seems an unnecessary risk to eat a lot or increase your intake.

Summary: Regular soy consumption is likely safe for PCOS patients, but the research is not thorough.

Increase Folate or Folic Acid Consumption

folate-and-pcosFolate and folic acid are both a form of vitamin B9. Vitamin B9 is essential to reduce the build up of a compound in the blood called homocysteine.

High levels are thought to be an independent risk factor for heart disease and stroke (23, 24, 25). Unfortunately, those with PCOS tend to have high homocysteine and therefore an increased risk of cardiovascular health problems (26, 27).

The most efficient way to reduce homocysteine levels is by increasing folate or folic acid intake. Folate comes from whole foods, while folic acid is the synthetic version in supplements (which some people cannot metabolize) (28, 29).

Top folate sources per 100-gram serve are:

  • Beans and lentils (~50% RDA)
  • Raw spinach (49% RDA)
  • Asparagus (37% RDA)
  • Romaine (Cos) lettuce (34% RDA)
  • Broccoli (27% RDA)
  • Avocado (20% RDA)
  • Oranges/Mangoes (~10% RDA)

Summary: PCOS patients tend to have high homocysteine levels, which appears to increase heart disease risk. Consuming more folate is the most effective way to remedy this.

Limit Junk Food and Added Sugars

It goes without saying that junk food is a nightmare for treating PCOS. That includes candy, granola bars, milk chocolate, potato chips, ice cream, fruit juice, soft drinks and similar products.

Theyíre typically high in calories and added sugars, which can raise insulin levels and disrupt other hormones. Not only does regular consumption of these foods lead to weight gain, but is likely a driving factor for ovulation problems and infertility (30).

Summary: Foods high in added sugars should be strictly limited, especially if you have PCOS

A Better Diet For PCOS Is Only The Beginning…

As you can see there are several important dietary considerations for PCOS.

Treatment also involves reducing chronic stress, increasing physical activity levels and getting adequate sleep. All these factors greatly influence our hormones, and in the end PCOS is a hormonal problem.

Be sure to discuss any diet changes with your doctor, especially if you use metformin and are considering a low-carb diet for improving insulin levels.

This post originally appeared on Diet vs Disease as†The Best Diet for PCOS: Splitting Fact From Fiction.

 

86 comments

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Elena Poensgen4 months ago

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Elena Poensgen
Elena Poensgen4 months ago

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John B
John B7 months ago

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Peggy B8 months ago

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Philippa Powers8 months ago

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Caitlin B
Past Member 11 months ago

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