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Kourtney promised to treat the “root cause” of PCOS, even though researchers have not yet identified one.

The BBC World Service tracked the most-watched videos with a “PCOS” hashtag on TikTok and Instagram during the month of September and found that half of them spread false information.

She warns people against pharmaceuticals such as the birth control pill, or the diabetes drug, metformin, both of which have been found to be helpful for many women with PCOS.

She puts a lot of emphasis on weight and what she calls “PCOS belly”, referring to fat around the abdomen.

“PCOS belly was exactly where my insecurities were,” she told me.