addictive substances

The five most addictive substances on Earth – and what they do to your brain

The five most addictive substances on Earth – and what they do to your brain

What are the most addictive drugs? This question seems simple, but the answer depends on whom you ask. From the points of view different researchers, the potential for a drug to be addictive can be judged in terms of the harm it causes, the street value of the drug, the extent to which the drug activates the brain’s dopamine system, how pleasurable people report the drug to be, the degree to which the drug causes withdrawal symptoms, and how easily a person trying the drug will become hooked.

Small changes in DNA can affect nicotine consumption

Small changes in DNA can affect nicotine consumption

Nicotine is an addictive substance and genetic factors are known to play a role in smoking behaviors. Recently, a team of researchers at Penn State and the University of Colorado determined how small differences in a particular region of the mouse genome can alter nicotine consumption.