WHAT IS THE SKIN BARRIER?
Think of a brick wall, says dermatologist Mona Gohara, M.D. The skin cells are the When the mortar suffers, the wall can crumble.
MAKE YOUR SKIN A BRICK WALL
The Semi-complete User’s Guide To… your Lungs
YOU KNOW FROM high school that your lungs bring in oxygen and move it to the blood (inhale) while taking carbon dioxide out of the blood (exhale). Not as well-known: Your lungs are also “immunologically the biggest filter ever,” says Ana Zamora Marti
