Medicinal Notes

Medicinal notes are among the most unpleasant and distinct defects in coffee. When a coffee exhibits these flavors, it often tastes like iodine, antiseptic, or harsh chemicals. These notes are not part of the natural flavor spectrum of coffee and are almost always a sign of a serious problem in the supply chain. They are considered a major defect, and a coffee with a strong medicinal profile is typically rejected by specialty buyers.

These off-flavors are usually the result of poor processing or contamination. For example, if the water used during the fermentation process is contaminated or if the fermentation tanks are not properly sanitized, the coffee can absorb these harsh, chemical-like flavors. In some cases, medicinal notes can also be caused by the use of improper chemicals or pesticides on the farm, or by the coffee being stored in an environment where it has absorbed odors from nearby chemicals or fuel.

Another potential cause is the 'phenolic' defect, which is often associated with medicinal or iodine-like flavors. This can occur when the coffee is harvested or processed under conditions that allow for the growth of specific bacteria or fungi that produce these off-flavors. It is a reminder that coffee production is a delicate, biological process that requires strict hygiene and quality control at every step, from the farm to the mill.

In practice, encountering medicinal notes is a rare but jarring experience. If you are cupping coffee and you detect these flavors, it is a clear sign that the lot is compromised. There is no way to 'brew out' these flavors; they are inherent to the bean. Recognizing this term is important for anyone involved in coffee quality control, as it helps identify and isolate defective lots before they reach the consumer. It serves as a stark reminder of the importance of sanitation and rigorous standards in the coffee industry.