metabolism

Energy efficiency is the ability of a machine to put precious energy to good use. The most intuitive example is fuel efficiency, which is usually measured in miles per gallon (mpg).

I have previously written about the concept of "drug-drug interactions." I put the term in quotes because it is not strictly accurate.

Depression and anxiety are not always easy to detect.

"Synthetic marijuana" or "synthetic cannabinoids" are the worst possible names for these types of drugs.