Question: what is the difference between c4 original and c4 ultimate?
Answer: Aside from those things, C4 Original Carbonated has five ingredients: citrulline malate, beta-alanine, betaine, and n-acetyl-l-tyrosine. C4 Ultimate Carbonated has the citrulline, beta-alanine, betaine, arginine alpha-ketoglutarate, n-acetyl-l-tyrosine, taurine, A-GPC, Zembrin, rauwolfia root extract, and huperzine A.