I am concerned generally with all non-natural substances, such as preservatives, artificial flavors and colors, etc. You didn't misread that part, and I don't t

I am concerned generally with all non-natural substances, such as preservatives, artificial flavors and colors, etc. You didn't misread that part, and I don't think that's a bad heuristic. It's a very different thing to say that all non-natural substances are possibly unhealthy (and that it's practically impossible to determine which are and which aren't) than to say that all natural substances are healthy. Sadly one could simply remove the preservatives from sriracha as long as refrigeration isn't a concern.