I was diagnosed with PCOS last year. My endocrinologist mentioned keto as something that can help with PCOS but wasn't specific about why or how much. Has anyone with PCOS done keto and what was the actual impact on your symptoms?
PCOS and keto have a strong documented relationship because the root cause of most PCOS is insulin resistance. When insulin is chronically elevated, the ovaries produce excess androgens (testosterone-like hormones) which cause the signature PCOS symptoms: irregular periods, acne, excess hair growth, weight gain particularly around the midsection, difficulty conceiving.
Keto addresses insulin resistance directly by minimizing the carbohydrates that spike insulin. Several studies show meaningful improvements in:
— Menstrual regularity (many women see periods normalize within 3-6 months)
— Androgen levels (free testosterone often drops significantly)
— LH/FSH ratio normalization
— Reduced acne and excess hair growth
— Improved fertility in some cases
This is one of the conditions where keto has the strongest evidence base, not just anecdote.
PCOS for 8 years, diagnosed in my late 20s. Three months of keto and my period came back for the first time in 14 months without medication. That alone would have been enough. After 9 months, my testosterone levels are in normal female range for the first time since diagnosis. I didn't know my labs could ever look like that.
The acne improvement surprised me the most. I'd had hormonal acne since my PCOS diagnosis and accepted it as permanent. By month 2 of keto it had cleared by about 80%. I'd spent years on topical treatments that barely helped. Removing the insulin spikes that drove the androgen production was apparently the actual solution.
This is so encouraging. I'm specifically hoping for menstrual regularity as a primary goal. Starting keto primarily for this, weight loss is secondary. Bookmarking this thread to come back to at the 3-month mark.
One practical note: PCOS keto may require stricter carb limits than standard keto (some endocrinologists recommend under 15g net carbs rather than 20g for better insulin response). Also monitor your thyroid — hypothyroidism is common in PCOS and the two conditions interact on keto in ways worth knowing about (see the hypothyroidism thread here).