Trick i learnt early was to do this. Punch into your search engine on the internet this, just for example, Flavour Art Chocolate percentage, or %. You will get heaps of info. Some flavours from some suppliers are great low, eg FA Glory, not a fave of mine but others love it at just 2%. But some FA ones are weak at that and like FA Coconut are best around 8%! Do that with Glory and you'll gag! It can be all over the place. Flavour West Black Licorice, 6% is great. But go to sweeten it with say Capella Super Sweet and all you'll need is 3 to 6 drops. Do the search and you'll be right. Good luck.