The problem with keto is, just like with "normal" diets is the wildly different formulations.
You can do keto with trash food or simply bad ingredients (e.g. vegetable oils for fat, various processed "keto snacks") and aside from maybe some weight loss you won't experience any of the real and sustainable benefits.
This is why you can't go with people's testimonials, I can guarantee you that people who say keto didn't work for them simply didn't know how to formulate the diet properly.
You can do keto with trash food or simply bad ingredients (e.g. vegetable oils for fat, various processed "keto snacks") and aside from maybe some weight loss you won't experience any of the real and sustainable benefits.
This is why you can't go with people's testimonials, I can guarantee you that people who say keto didn't work for them simply didn't know how to formulate the diet properly.