Making a customised herbal remedy puts one into great care when choosing the best herbs. Each one of them does have some properties which could come as a help or be on the way for the work of other herbs in the formulation. Paying attention to the energetics and therapeutic actions of individual herbs, an herbalist can combine herbs into a compound that will have synergy and focus on a particular health concern. The art is to balance the flavours, temperatures, and actions to get ideal therapeutic outcomes for the individual in question.

The composition of the herbal formula represents the mixing of individual herbs in a definite proportion to achieve the required therapeutic activity. The herbalist must consider both the independent properties of the herbs and their collective effect in combination.