metabolism

The cell is amazingly energy efficient. Capable of trapping about 38% of the energy that it receives from sugar, it may be the most energy efficient machine on Earth.
Sometimes taking a second drug can have a profound effect on one that's already being taken. That's because it can cause abnormally high or low blood levels of the first drug. This is known as a drug-drug interaction. Opioids are used as an example of how this works.
Depression and anxiety are not always easy to detect. Symptoms can range from worry to chronic indecision. Thus, an easily detectable biomarker for would be preferable, and Chinese scientists believe they have found one using a urine test.
Synthetic cannabinoids are sometimes mixed with rat poison, which causes uncontrollable bleeding. So, as it turns out, the neighborhood drug dealer might not be a completely trustworthy individual.