I absolutely know that for myself that if I drink a processed lemonaid that is not just lemon juice, water, sugar, lemon oil, corn syrup, citric acid type or just the lemon, water and sugar - these are ok but the kind that comes per powdered or at fast food places gives me vertigo ... the other night got this little bottle in the cooler at grocery store...dang! I got that vertigo again....there is something in the more chemicalized mixes that give me vertigo - fact. I wanted to share this for those to see if they have done what I have and the best thing is to avoid if the reason may fit. Also since this happens to me that to some how find out what the chemical is that even maybe with other drinks works ok together but with partially fake lemon formulas cause this dibilitating condition... I know others can have other reasons or anyone just by other conditions but this is one that coincides with the cheap lemonaid drinks....thanks for listening and if this was also your reason..now you know ! :) Blip