LSD does not form "crystals" that reside in the body to be "dislodged"
later, causing flashbacks. LSD is a crystalline solid (though it is
unlikely that one would ever have enough to be visible to the naked
eye) but it is easily water soluble, thus cannot form bodily
deposits. Furthermore, it is metabolized and excreted in hours. The
bogus "loosened crystal" description in not necessary to explain
flashbacks, which are psychological phenomena (see FLASHBACKS).
http://www.erowid.org/chemicals/lsd/lsd_myth1.shtml
http://www.erowid.org/chemicals/lsd/lsd_faq2.shtml

I really dont feel like lookin up the actual research, but if you think you can point to something that says lsd is stored in fat, be my guest, cus ive always read that it is water soluble, therefore not stored in fat.