My guess is in the context of certain antidepressants -- specifically MAOIs (monoamine oxidase inhibitors). Many of them can have a negative reaction with sharp cheddar cheese because it is high in an amino acid that regulates blood pressure known as Tyramine.
Monoamine oxidase is an enzyme which breaks down excess Tyramine. As the name indicates, MAOIs inhibit/block that enzyme. So, if you're consuming a lot of Tyramine (via the sharp cheddar cheese) while taking MAOIs, it can lead to high blood pressure.
Haha. Good knowledge and rationalization, but in all seriousness (sorry to be a downer) it's more likely that "sabor" was included in the section as a reference to the taste of medicine, or the taste of blood (or maybe the sweet taste of urine in diabetics???), and Duo just pulled any sentence containing it from the database - as it often does with other words that can be used in many contexts.
Duo regularly includes sentences that are completely unrelated to that lesson's topic, that's why. In the Japanese lessons there were sentences about the weather in the lessons about hobbies or vice versa, I forget. Then there's crazy sentences about dogs selling books (Japanese lessons) and butterflies writing books (portuguese lessons). Sentences unrelated to the lesson's topic is mild by Duo's standards : )