I was currently told by a co-worker how great Stevia is as a sweetener. I split one packet between my morning Grapefruit, and green tea and ended up having an allergic reaction. I was stranded at work with no one around (I open) as my throat began to feel restricted and my lips began to swell. Within minutes of eating my grapefruit, and drinking my tea, my upper lip was HUGE and SWOLLEN, and my throat maintained the restricted feeling for over an hour. Needless to say I looked into it. Apparently if you have any weed allergies you are more likely to be allergic to Stevia. I suffer from these allergies mildly at the beginning of the pollen season, and recommend others investigate this product before using it.