Phenylalanine is not a widely accepted treatment for any condition. But people have tried to treat a number of conditions with phenylalanine, including:
Some research, mainly from the 1970s and 1980s, offers some support for using it for depression. Several studies also showed that L-phenylalanine plus ultraviolet A light may be helpful for people with vitiligo.
There is less evidence to support its use for other conditions.
- Chronic pain
- Depression
- ADHD
- Vitiligo (light-colored patches on the skin)