When a herbal syrup is made, the normal preservitive is Glycerin made from coconut. Christopher seen that Glycerin was a healing herb by its self.
The high alcohol versions do work well! Children do not like them and I like to make something my kids like. The more potent herbal formulas I do leave high alcohol. You do not see commercial made high alcohol formulas in health food store much anymore! They use the cheapest methods they can, I advise you make your own or buy from an herbalist. Most herbalist have you sign a disclaimer. Naturally, big brother does not like high alcohol formulas either, so they are too common today!
You can deworm if you have tooth metals. I would not fast past 3 days at a given time until your teeth were metal free. Sugar and all problems are reversed by a simple 14 day fasting method.