The Big Picture

Stimulants can make you feel focused but they also cause some people to pick at their skin, bite their nails, or feel particularly irritable or maybe even aggressive when the medication wears off. NAC is an amino acid that helps balance certain brain chemicals to reduce these repetitive habits and make the afternoon crash feel less intense.

In Depth

NAC is helpful for two specific problems that stimulant users often face.

1. Repetitive Habits: Some people find that Adderall or Vyvanse makes them focus too much on physical habits and self grooming activities like biting their nails or picking at their skin. NAC is one of the only supplements with evidence for reducing these specific impulses.

2. The Afternoon Crash: When ADHD medication wears off (especially amphetamine-based ones such as Adderall or Vyvanse), the brain can feel overwhelmed or angry. NAC helps by regulating glutamate. Glutamate is a chemical that can cause feelings of stress and agitation if there is too much of it in your system. Trying NAC can make the transition at the end of the day feel smoother and less volatile.

The Science

NAC changes how your brain handles glutamate. Glutamate is responsible for sending signals between nerve cells. If you have too much glutamate activity, you might feel anxious or get stuck doing repetitive tasks. NAC keeps glutamate at a healthy level which helps quiet the mind.