How do coffee and cigarettes for breakfast influence each other? The answer depends on understanding how the chemicals in both interact to influence brain function. First, coffee contains caffeine.

Nicotine pouches are the latest pre-workout trend among lifters and influencers. Experts say it may hurt performance more than help it.

As a physician, I witness the subtle signs of nicotine use daily. I walk through clouds of sweet-smelling smoke from vape pens as I enter the grocery store. At traffic lights, I glance over to see ...