I'm a keto person and boy, has eating nutrient-dense pure meat and vegetables really changed my mental and physical body composition.
Brain is sharper, joints no longer hurt, bloat is gone, and I'm down two sizes in clothing all while eating things like steak,shrimp, fish, heavy cream, sour cream, lots of gourmet cheese, organic veggies like cabbage, broccoli, cauliflower, spinach, etc. to satiety. I eat good butter,animal fat, coconut and quality Spanish olive oil, and no hydrogenated fats, grains or processed food.
For the first time I don't feel captive to my appetite. I go hours without eating and don't even notice. Truly amazing to me, as I love to eat
Not trying to convert here--just sharing my actual experience for the past 8 months or so.