[christophilus]

Dr McDougall suggests 80% of calories should be from complex carbohydrates, and it’s a diet that has worked well for many— especially for diabetics and people with heart / blood pressure problems. I think it’s really hard to know exactly what is good vs bad for any given individual.

[nwah1]

The really basic thermodynamic approach of just measuring calories has fallen out of fashion for some reason, but given that both protein and fat just reduce down to carbs and simple sugars after a certain point, it seems to me that the relative differences between them are overrated. Macronutrient ratios probably just don't matter that much as long as you are meeting your essential amino and fatty acid levels, which is extremely easy to do in a developed country.

There are some important and complex considerations with respect to certain things like gut flora, for instance. Or people with particular genes that change how their metabolism works, or their liver enzymes. But nutrition science is primitive and self-contradictory at the moment. We lack the knowledge to provide a personalized medicine approach.