Beta Alanine studies have shown minor increases in muscular endurance, anaerobic running capacity, and lean mass
https://examine.com/supplements/beta-alanine/
I dont know how well it works, but every time I have taken a supplement with a decent amount of beta alanine my skin get a tingling feeling.
Don’t take BA with caffeine/coffee or your skin may feel like it is tingling or on fire lol.