Cysteine

Nonessential Micronutrient

OVERVIEW

Summary

A nonessential amino acid, cysteine is sulfur-containing, which means it helps positively maintain the structure of proteins in the body. Since it’s also a component of the powerful free-radical fighter glutathione, cysteine serves as a powerful antioxidant. Cysteine, though, is rarely used as a supplement. N-acetylcysteine* (or NAC for short) is more commonly used as a supplement because it is a more stable and readily absorbable form. As well, NAC, and not cysteine, has been used in almost all research that demonstrate its positive effects.

  • Please refer to N-acetylcysteine for corresponding information.


Other names for Cysteine

L-cysteine

PERFORMANCE BENEFITS

Why athletes use Cysteine
  • Please refer to N-acetylcysteine (NAC) for corresponding information.

HEALTH BENEFITS

Signs of Cysteine deficiency

No deficiency conditions are known to exist.

DISCUSSION

More about Cysteine
  • Please refer to NAC for corresponding information.

NOTES ON USAGE

Synergists of Cysteine

No synergists have been noted.

Safety of Cysteine
  • Please refer to N-acetylcysteine for corresponding information.
Toxicity of Cysteine

No known toxicity.

Bans and restrictions

None reported.

RELATED RESEARCH

  • Please refer to N-acetylcysteine for corresponding information.