double-edged

When it comes to cancer, aging is a double-edged sword, researchers are increasingly learning.

Vashi also addresses the "social media effect" which she describes as a double-edged sword.

For human health, the global food trade is a double-edged sword, says Marco Springmann, a researcher at the University of Oxford’s Environmental Change Institute.

“We work for today, and Clarence strives for today,” he says, “but it’s a double-edged sword. Because he knows he can fly — we know we can do these things — but at what cost?”

Stress is a double-edged sword when it comes to memory: stressful or otherwise emotional events are usually more memorable, but stress can also make it harder for us to retrieve memories.