@bonitaaranha.. That's one issue that occasionally crops up during discussion In improving taste in food and beverage with fellow food scientists.
As far as I can remember,...
There are various ways to sort that matter; namely microencapsulation of bitter material, forming a chemical complex to prevent direct contact of the bitter component on the tongue taste receptors, the use of non nutritive sweetener like stevia to counter bitter taste, and the employment of bitterness blocking agent One material example is AMP or adenosine monophosphate.