You have the disadvantage of operating in a space where a lot of people and companies claim a lot of different things, and where cause and effect is maddeningly difficult to sort out.

For example, if you read Slate Star Codex, you can find all manner of posts discussing how psych meds are produced and brought to market, how they can behave in unpredictable fashion, and why claims made by the pharmaceutical industry should be regarded with a healthy dose of distrust. But its author is a trained psychiatrist, and he'd be the first to tell you that psych meds do indeed work.

Personally, I've dealt with sleep issues for years with reasonably consistent symptoms. I read various books and tried CBT, therapy, and a variety of meds. A lot of this seemed to either do nothing, or else have strange effects. Eventually I tried some med that got terrible reviews online, which to my surprise pretty much solved my problem overnight. Now I'm overseas for several months without access to this medication, and to my complete surprise my sleep has been fine. Why? Will things stay this way? I wish I could tell you!!

All this is to say, for your target market, suspicion and distrust will often be par for the course. Please don't take it personally :)