PMOS (PCOS) and Diet: What Can Nutrition Realistically Do? - SNP#50
Sigma Nutrition Radio
Danny Lennon
4.8 • 633 Ratings
🗓️ 21 May 2026
⏱️ 19 minutes
🧾️ Download transcript
Summary
In this episode, we examine what nutrition can realistically do in the condition historically known as PCOS, now renamed polyendocrine metabolic ovarian syndrome, or PMOS.
We begin by explaining why the name change matters: the condition is not defined by ovarian cysts, but is better understood as a broader endocrine-metabolic and ovarian syndrome involving insulin resistance, androgen excess, ovulatory dysfunction, metabolic risk, and psychological burden.
We then assess the nutrition evidence, including energy restriction, weight loss, carbohydrate quality, glycaemic index and load, protein intake, fat quality, appetite regulation, fertility outcomes, and phenotype differences. Rather than seeking a single "PCOS diet", the episode asks which dietary features may plausibly help, how strong the evidence is, and where uncertainty remains.
Transcript
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| 0:00.0 | Hello and welcome to another episode of Sigma Nutrition Radio. |
| 0:18.0 | My name is Danny Lennon. |
| 0:19.4 | You are very welcome to the podcast. Today we're going to be |
| 0:22.6 | talking specifically about the potential impact of diet in the condition historically known as |
| 0:28.7 | polycystic ovary syndrome or PCOS, which has just now been renamed polyendocrine metabolic ovarian |
| 0:36.7 | syndrome, abbreviated PMM-O-S. |
| 0:39.8 | And this name change was set out just recently in a May 2026 publication that appeared in Lancet |
| 0:46.7 | Health Policy by Teed and colleagues. |
| 0:49.6 | This was following a multi-step global consensus process involving people with the condition, |
| 0:55.6 | health professionals, researchers, patient organizations, and professional societies across |
| 1:01.0 | various regions of the world. And the rationale for the change is that the old name is |
| 1:07.3 | inaccurate essentially and potentially misleading. So polycystic ovary syndrome implies that the |
| 1:13.9 | condition is defined by these pathological ovarian cysts. But that's not really what is going on |
| 1:20.5 | in this condition, as we will explain later in this episode. The ovarian feature, when it is present, |
| 1:27.0 | is better understood as arrested follicular development |
| 1:29.9 | or polycystic ovarian morphology rather than cysts in the usual pathological sense. |
| 1:36.6 | The old name also frames the condition too narrowly as a gynecological or an ovarian disorder, |
| 1:43.3 | but the syndrome is much broader than that. It involves |
| 1:47.2 | endocrine, metabolic, reproductive, dermatological, and psychological features. It can involve |
| 1:54.2 | things like irregular menstrual cycles, ovulatory dysfunction, elevated antigens, acne, impaired glucose regulation, insulin resistance, |
| 2:03.3 | fertility issues, and increased risks of higher rates of things like anxiety, depression, |
| 2:09.1 | body image distress, sleep problems, disorder eating. So a wide, multi-system condition that can |
... |
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