Public discussion of NZE commonly references caffeine, Alpha-GPC, L-theanine and L-tyrosine, but buyers should rely on the current official package.

Yippy’s public Course product information describes a caffeine-free blend of L-theanine, L-tyrosine, rhodiola and ashwagandha.

Plopii’s public product page describes a nicotine-free formula using paraxanthine with Alpha-GPC and citicoline as a dual-choline stack.

Ultra’s published help center lists enfinity® paraxanthine, L-theanine, Alpha-GPC, Panax ginseng, vitamins B6 and B12, plus formulation excipients.