I don't think you are getting downvotes because developers don't care about their health. It's because you are saying that ONE smoothie is changing lives... which is a ridicolous statement. And it honestly sounds like an attempt for self promotion.
I promote your health, sir. Not myself. Forget about me. Think about you. And in particular, note that I don't have any ads on my video. It's really about you. If you can believe that. Sometimes people try to do good for its own sake, even in this day and age. Crazy, huh?
Fine. "Everyone who has tried this, and it's about 20 people at this point, from local people (my family, for example, local friends) to those I only know online--every single one of these people has experienced benefits and shared their happiness with me."
How's that? Don't be a cynic. Don't be too far above it all. Don't "know it all" already. Just try it. Because, while the video is new-ish (I used to have a different one, years ago), my doing this is years in the making. Years. This is no fly-by-night experiment.