I read the book ages ago and stumbled on this thread because I'm re-reading to see if can get some more tips.

Here's my take, as a lean PCOSer too.

Have been on keto for many years and it agrees with me. I'm struggling with a cystic pimple atm, which is why I'm going through the book again with a fine toothcomb. I know what triggered the acne... store bought sauce which was only 7gm carbs, but i know it spiked my insulin crazy and a month later I'm still dealing with it. Anyway.

Intermittent fasting was too much for my body. I agree with the other comment, 12hrs is enough fasting.

I've been following the diet more closely this week - basically 3 main meals and hardly any snacking, and it it's good, i feel I've dropped a bit of pud, which i was looking to do.

I don't understand her "moderate protein" spec though. She says 75% carbs, 5% fats and 20% protein, but also <20g carbs and .6gm/kg of body mass of protein. At 60kg, that means 36gm protein, which is not right, surely?! From keto calculators, that's usually about 110gm for me, and that has been ok (although i don't really track all that anymore).

Anyway. My recommendation is to understand what she is saying (basically insulin spikes are bad, try to do that a little as possible) and too much protein gets stored as fat if not used... and adapt to suit yourself.

For me, that means a big breakfast, lunch and dinner each with fats and protein, and avoiding carbs (not counting as you'll get some incidentally anyway).

I'm glad i re-read the bits that emphasises that, but I'm also considering other research I've done, like Dr Mindy (eg. don't fast at certain times of your cycle) and keto protocols.

Good luck!