Before there was streaming video, regularly scheduled programming forced us to show restraint when it came to watching episodes of our favorite TV shows back-to-back.

Now, a single streaming platform gives us access to thousands of shows and movies to watch — whenever we want, wherever we want. Even the most disciplined among us probably struggle with our new ease of access.

So is the old saying true? Can too much of a good thing be bad?

“Binge-watching itself is not bad. It’s only unhealthy when it starts to replace activities we should normally be doing,” says Dr. Randall Wright, neurologist at Houston Methodist.

In the video above, Dr. Wright, an expert on brain health, explains how binge-watching turns bad when you let it cut into activities that are important for a healthy brain.