I have heard that a diet of ruminant animal meat, such as beef, eggs, liver, bacon, grass fed butter and little else gives you similar benefits — weight loss, reduced insulin levels, reduced inflammation, cognitive improvements.
Those foods supply plenty of amino acids and if other foods aren’t consumed perhaps the body can concentrate its efforts on the production of glutathione.
In any case, I thought it was interesting that there seems to be a reason that this particular diet and these amino acid supplements give such a similar result.
I am trying Carnivore diet. I love meat and have craved salt all my life and I think this counterintuitive step is helping. I still have carbs but very selective and minimized as much as possible. Just the exclusion of everything processed in a box with a packet of poison inside or frozen ready to eat crap has made a YUGE difference!