This is what works for me:
Stage 1: Kill your cortisol with carbs and sun
Pig out as hard as possible on low moisture, low fibre carbs with low fat and lower protein foods for about four weeks. I've found that pasta, bread, cereal work better than fruit and fruit juice as staples. Potatoes are fine, but not as most of your calories because I think the excessive potassium and lower calorie density are a little stressful. Cooked rice should be somewhat minimal too, because it has a little too much water content for this stage. Equally important is getting as much sun and outdoor time as possible for knocking cortisol way down.
Eat as much as possible starting early all the way until bed time. Density and chewing very well are key. Ideally eating near 4000 calories per day of mostly carbs and maybe a little protein from some cheese or a little milk.
A little exercise is fine, but keep it mostly to something easy like walking 2-4 miles a day. A minimum of two hours of outdoor sun time per day, preferably much more and in the morning and evening.
This stage sets you up to get the benefits of eating more protein. Since you are eating low protein tryptophan and the other inflammatory amino acids are also low.
By the end of the month as cortisol has been down for awhile your thyroid should be starting to kick in harder.
Stage 2: Eat more protein and do a little more exercise and stop pigging out as hard
After about a month up the protein to a palatable amount. The extra protein should be put to good use. Now that your cortisol is lower your body should be able to digest and utilize protein much better. You can also up fat as well and lower carbs a little if you prefer.
Total calories can come down to 2500-3000 calories. Now that thyroid hormones are converting better you shouldn't need quite as much food to keep cortisol down.
At this point your body should also be able to handle doing some kind of weight lifting or anaerobic exercise a few times a week which will help out a lot with balancing testosterone and estrogen.
Stage 3: Keep it up.
Don't fuck up and start under-eating, under/over-exercising, under-sleeping, sitting too much, being indoors too much or going too low carb ever again. If you do you will need to go back to stage one for awhile.
This is just my experience. I think it works well for people who simply have stressed themselves out too hard for a few months.
The common conception of a "Peat inspired diet" doesn't seem to work at all for me when my cortisol is high. I don't seem to have the digestive power for all that protein and liquids. Once my cortisol is down from cramming non-stop dense starch down my throat I seem to actually do quite well on a dairy and fructose centered diet, but my taste buds actually prefer a more meat, egg, cheese, and starch type menu (traditional cuisines) and I still do well on it.
I think it can be done without any supplements at all, but reasonable amounts of A, D, E, K are probably helpful as well as some zinc once cortisol is down.
Has anybody else used a similar strategy?