It all depends on why you are putting them in the tincture. Most of Doc’s formulas are equal parts, but not all. Let’s say you were doing echinacea but you wanted to add in some cayenne so it would be absorbed better into your body, you wouldn’t want to do equal parts on those unless you wanted to burn yourself up! In that case you would do 1 part echinacea and maybe .25 part cayenne.