Best monster flavour??? And does anyone know someone else with guarana anaphylaxis??

Went on a walk to kmart, abt a 15 minute walk with my gf and these shower sandal things that havnt fit me since 5th grade and ended up with massive blisters but anyways, they didnt have the usual zero ultra i love BUT they had the original green and i realised ive never tried it. I liked it but my gf hated it despite stealing it atleast 5 times for another sip and then gagging but what is the best monster flavour? I cant have it too much since my mums anaphylactic to guarana. My mums never met wnother person with it, she cant be in the same room as it and even the smell on someones breath is enough to make her lips swell at throat close up, how common is this??