Andy, The Guiness Book record is held by a Red Savina Habanero (capsicum chinense) grown in Oxnard, California registering 577,000 Scoville Heat Units measured using high pressure liquid chromography. Heat is a subjective thing, though. Capsaicin is made up of seven alkaloids that come in varying amounts in different varieties of chiles. How a person is wired up determines how one reacts to the different alkaloid combinations hence the different perceptions of heat. For me Habaneros come on slowly, rolling up from the back of my throat and settling around the eustachian tubes, a sensation I find quite pleasant. Jalapenos, Serranos (capsicum annum) to me have a peppery, up at the front of my mouth heat that disapates quickly. Some people claim the Rocoto is the hottest, though is only rates around 50,000 Scovilles using HPLC, however its alkaloid profile is quite unique. Also, if you grow your own, you will know that two peppers from the same branch on the same plant can have radically different heat levels; climate, growing conditions, soil content all contribute to heat and flavor. Have fun making your own determinations. Doug ************************************************************* * For the sake of tolerance do we tolerate the intolerable? * *************************************************************