Each brand claims itself to be the best with 100% of bioavailability. It becomes quite confusing to pick the right product while making a purchase. What we have labeled out is, many manufacturers use chemicals that nobody wants in the body like ethanol, propylene glycol, and other surface-active molecules that coat the tiny drops of CBD oil Sublingual. For instance, propylene glycol is a common additive in shelf-stable emulsions that was recently named “Allergen of the Year” by the American Contact Dermatitis Society.