Dose, timing, and stacking basics

Some ingredients work the same day — caffeine, L-theanine, L-tyrosine. Others, like Bacopa or Lion's Mane, build up over weeks and do little on day one. Knowing which is which prevents both impatience and disappointment.

A good routine usually mixes the two: an acute layer for the session in front of you, and a chronic layer working quietly in the background.

The classic example is caffeine with L-theanine: theanine takes the edge off caffeine's jitter while keeping the alertness. That's stacking done well — two ingredients that improve each other.

The trap is the kitchen sink: ten ingredients at once, none clearly doing anything, and no way to tell what helped. Fewer, well-dosed ingredients almost always beat a long, vague list.