I read an interesting interview a while ago. Among other things it mentions that "The beta-carotene that is produced synthetically is a single isomer -- a very

I read an interesting interview a while ago. Among other things it mentions that "The beta-carotene that is produced synthetically is a single isomer -- a very straight molecule called "all-trans" beta-carotene. Beta-carotene that is found in nature frequently consists of both the straight "all-trans" molecule and a variety of bent molecules that contain what are called "cis" double bonds." http://drpasswater.com/nutrition_library/carotenoids_interview.html http://drpasswater.com/nutrition_library/carotenoids_intervi...