N-Acetyl (2-Cyanoethyl) Cysteine (NACE)

An elevated level of "N-Acetyl (2-Cyanoethyl) Cysteine" on a Total Tox Burden test panel by Vibrant Wellness indicates recent or chronic exposure to acrylonitrile, a toxic chemical compound used in the production of plastics, synthetic rubbers, and resins.

What is N-Acetyl (2-Cyanoethyl) Cysteine?

This biomarker is a urinary metabolite—a breakdown product formed when the body processes acrylonitrile. Specifically, it is derived from the conjugation of acrylonitrile with glutathione, followed by enzymatic transformation to a stable cysteine conjugate that is excreted in urine.

Primary Sources of Exposure

Elevated levels may reflect exposure from:

• Cigarette smoke (a major source of acrylonitrile)

• Plastic manufacturing environments

• Combustion of fossil fuels

• Rubber or adhesive industries

• Contaminated air or water near industrial areas

Health Implications of Elevated Levels

Chronic acrylonitrile exposure has been associated with:

• Oxidative stress

• Liver and kidney toxicity

• Neurological effects

• Potential carcinogenicity (classified as a probable human carcinogen by the EPA and IARC)

What to Do If Elevated

1. Identify and minimize exposure:

   • Avoid smoking or secondhand smoke.

   • Use air purifiers if you live near industrial zones.

   • Use protective equipment if working in relevant industries.

2. Support detox pathways:

   • Nutrients like glutathione, NAC (N-acetylcysteine), and selenium support phase II liver detox.

   • Stay hydrated and maintain good kidney function to aid excretion.

3. Follow up:

   • Work with a functional medicine provider or environmental health specialist.

   • Consider retesting after lifestyle changes.

Summary

Elevated N-Acetyl (2-Cyanoethyl) Cysteine suggests exposure to acrylonitrile, a toxic compound primarily found in smoke and industrial settings. While the body attempts to detoxify it through glutathione pathways, persistent elevation may signal harmful exposure levels that warrant investigation and mitigation.

N-Acetyl (2-Cyanoethyl) Cysteine (NACE) is a metabolite formed as a result of exposure to acrylonitrile, a chemical found in a variety of products, including acrylic fiber clothing, carpeting, acrylonitrile-based plastics, and plastic food containers. Acrylonitrile can also leach into foods from these materials, and it is present in cigarette smoke.

Acute exposure to high levels of acrylonitrile, especially through inhalation, can lead to respiratory irritation, difficulty breathing, dizziness, cyanosis (bluish skin), limb weakness, and convulsions. Long-term exposure may cause symptoms such as headaches, fatigue, and general malaise. Acrylonitrile is primarily metabolized by the liver, where it is conjugated with glutathione by glutathione transferases. This process leads to the formation of N-Acetyl (2-Cyanoethyl) Cysteine, which is then excreted in the urine.