I heartily encourage everyone to try radically different (but nutritionally complete) diets for a month or two, if for no other reason than to see how your body and brain responds. Go vegan, try keto/lchf, try carnivore, try soylent, try sated. See what, if anything, it gets you.
I like spending 80% or so of my life in ketosis (usually for 2-8 weeks at a time), due to the many small changes it causes in my body and mind.
One of the interesting side effects (for me) is a significant reduction in dental buildup, and after a few weeks of not eating sugar, much of the existing buildup (if I haven’t had a professional cleaning recently) will spontaneously crumble and detach.
It surprised me when it happened.