That itch across your face and forearms is paraesthesia. It is harmless, it fades in about half an hour, and it reduces with regular use. It is not a sign the product is working, and its absence is not a sign that it is not.

Beta-alanine works by accumulation. It raises muscle carnosine over four to six weeks, which buffers the acid that limits you in the 60 second to 4 minute range. Because it builds up over time, the day you take it is irrelevant, and rest days count as much as training days.

That accumulation is also why doubling up achieves little. If your pre-workout carries 3.2g and your pump product carries another 1.6g, you are mostly doubling the tingle rather than the benefit. Anyone stacking two products should check both labels.

So this collection suits two groups. People who find the sensation genuinely unpleasant, and people who already take beta-alanine separately or in another product and want to keep their total sensible.

If you do want beta-alanine, the clinical dose is 3.2g daily. Anything at 1.6g is a partial serving, and taking it consistently matters far more than when you take it.