Robert- In my experience, variance in tolerance is a natural result of intake and body chemistry. I find that pushing myself past the comfort limit for several days increases the limit, just like working out increases strength limits. Likewise, limiting my intake of heat makes me more sensitive to it. This is probably further affected either way by body chemistry. For example, I have been prescribed BIAXIN, an antibiotic, and it had two strange side effects: 1. It made me want to eat all the time. Really bad news for the slightly overweight geologist. 2. It made me CRAVE spicy food. I was visiting my brother at the time, and consumed incredible volumes of Pickled hot peppers, hot pepper pizzas, picante sauce, powder (I brought my own stash), and on one occasion, all the bottles of Hab. sauce the Mexican Food place had on hand. I feel sure that similar but lesser side effects occur with the things we eat and drink every day, without us really noticing it. I have found that dairy products stimulate my appetite and tolerance for heat, while acidic products like tomato paste decrease them. I can't speak for other Chs, so I guess you'll have to ask them or experiment. Calvin Robert A Reed wrote: > One of the things I,ve been puzzled about for quite a few years now in > changing heat tolerances . while I.m usually able to tolerate a fairly > high amount of scovils , sometimes I can't seem to get enough ( I then > can dump lots of endorphine rush and it will hardly phase me ) , but then > there are times that I wimp out and find a medium heat Jalapeno sauce > more than I can handle. ( fortunately that doesn't happen to often ) > > Does this hapen to any of you out there and more important when does it > happen I would like to trace this out so that I would at least have a > warning on when it might occur. > > ________________________________________________________________ > YOU'RE PAYING TOO MUCH FOR THE INTERNET! > Juno now offers FREE Internet Access! > Try it today - there's no risk! For your FREE software, visit: > http://dl.www.juno.com/get/tagj.