I've been trying to find "rational criticism" of Peat's dietary thinking. I say "rational" because most opinions I read are either totally dismissive and mocking of Peat, or, totally uncritical and accepting of everything he said.
I found an interesting long-form article/critique here:
https://optimisingnutrition.com/ray-peat-diet/
Some of the points are off-base, but others are pretty fair. For example, the author speaks about high fat and high carb mixture, which is dangerous:
"But as we can see, the percentage of total calories from protein (protein %) is just 12%. This leaves our calories from fat and carbs at 35% and 52%, respectively, which aligns with the hyper-palatable fat-and-carb danger zone that is the least satiating. This is pretty close to the hyperpalatable micronutrient profile of ultra-processed foods like a doughnut or cookies, which provides tons of energy but leads most people to overeat and gain fat."
I understand in theory what he means, but the first thing that struck me is that he isn't mentioning PUFA when comparing fat and carb mixture to "a doughnut." A donut is deep-fried in PUFA oil, then covered with typically PUFA-seed oil sweetened icings - not even real sugar!
It's an apples-and-oranges comparison, in my opinion.
Same thing when he mentions iron - saying Peat recommended limiting muscle meat. Ok, true enough, but he also claims Peat limits eggs, liver, and meat in general. Furthermore, he doesn't seem to acknowledge that nearly all foods have been fortified with high levels of iron and other minerals that, while essential in theory, are likely being over-consumed.
Finally, he makes other claims about nutrient density/availability, things like this. "Honey isn't nutrient rich," etc. First, I don't think that's true. Second, it seems to me that Peat was viewing these as tools or parts working within a mechanical system. Correct me if I'm wrong. I don't agree 100% with a "mechanical" view of nature, and think it is outdated.
I take a middle-road between the author's view and Peat's, in that it's really difficult to say which minerals and vitamins are "necessary" given that the complexity and depth of interactions are unknowable. And I'm not a scientist or nutritionist, so would have even less ability to dig into this meaningfully.
Again, the article seems to have a slight tone of straw-man-ism; I don't think Peat ever said Iron was unnecessary or should be removed totally, just like pufa, tryptophan, estrogen, serotonin, etc. None of these things are bad in themselves but, arguably, very much the product of the food-environment we inhabit in the post-1950s world. What I think is that Peat only expressed ideas about limiting these because of the damage they appear to be causing. I'm always open to other theories of degenerative disease, worsening health, etc. The author doesn't seem to have read much of Peat's work to understand how all of these things relate and why certain foods and ingredients, for that matter, are viewed with scrutiny.
At the same time, I'm trying to think critically about the Peatarian ideas as I eat and plan meals. Generally what has been working is high-carb. I don't see too many problems with starches like bread or potatoes, despite Peat's ideas. I don't like OJ and have felt no better drinking it. I've reduced and avoided pufa/dead-food consciously and can say I feel a difference there. I've only had a few experiences where I think my blood sugar was a bit high for too long, due to coke, fruit, etc. but to me, the irony is that I've never felt that sort of dizzy, energetic sensation before because I've always limited sugar, as I was taught sugar is terrible for one's health. Meals with a lot of fat or protein weigh me down, and I suspect part of this is related to the fact I'm not eating lots of protein or fat on a daily basis.
Last, I think food-combinations are very interesting. Honey and yogurt, for example, work in tandem, as honey helps transport bacteria to the gut. Whether or not this is good doesn't exactly matter, because it reaffirms Peat's thinking on inter-relationships, action and counter-action, etc.
https://www.uclahealth.org/news/article/honey-helps-yogurt-bacteria-survive-digestion