I have no personal experience...but I know that it is possible. Could you discuss chaning to an animal insulin...for say a 3 month period, and see how it goes? Thatw ould help answer your question at least...and if you control improved great, if it got worse, but you were not suffering with the heat, then at least you have nan answer, and could then work on getting better control with your new regime? One of the posters on this board..Janabelle, is very active in the campaign, that human insulin is not for everyone...have at look at some of her posts...might point you in teh right direction?