John, I after 172 posts you can't make up your mind about organic or synthetic i am not sure my input will help. I don't want to repeat facts allready stated in Bee-L so here are a couple facts from Encyclopedia Britanica. Formic acid occurs naturally in animal secretions and muscle. It may be prepared synthetically by the oxidation of methyl alcohol and of formaldehyde. Formic acid is employed in the dyeing and tannin industries. As with all things in life a small amount is ok but a large amount could be bad for you. One of the largest class action lawsuits in U.S. was against a tannery and its use of formic acid. Basis for John Travolta movie and i believe the movie name is Civil Action but its a video stores and if you ask i am sure they can help. We all agree that the formic acid used to rid our hives of mites in dangerous. My opinion is Formic acid if applied correctly could be the best answer to the mite problem now but i would like to see the chemicals removed from our hives. Formic acid is the chemical of choice by our bee experts. In the U.S. we were to see the gell on the market last fall. Then this spring! Now next fall! Whats the delay? I have heard many stories about label and package problems but lets hear from the maker of apicure. Bob Bob