2. YOUR VISION GETS BETTER.

Because adrenaline is intended to prime the body to react to a perceived threat, one consequence of its release is the dilation of the pupils in your eyes. When your pupils expand, you’ll find your vision improves by letting in more light. Glaucoma sufferers once took synthesized adrenaline to decrease pressure in the eye.

3. YOU’LL BREATHE EASIER.

While stress may have you feeling tightly wound, adrenaline tells smooth muscles in the body to relax. That includes the bronchioles in the lungs, which can make respiration easier. That’s why asthma sufferers usually produce a lot of adrenaline in their bodies, and sometimes get injected with even more during an attack.

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