Human Biomonitoring of Butylated Hydroxytoluene (BHT) in Germany: Methods, Exposure Levels, and Health-Based...

Area of Science:

• Environmental Health
• Toxicology
• Biomonitoring

Background:

• Butylated hydroxytoluene (BHT) is a widely used antioxidant in consumer products.
• BHT's toxicological concerns include hepatic enzyme induction and reproductive effects.
• Its prevalence necessitates human biomonitoring (HBM) to assess exposure and health risks.

Purpose of the Study:

• To develop a sensitive analytical method for determining BHT acid, an oxidized BHT metabolite, in urine.
• To apply this method in HBM surveys to assess BHT exposure in German populations.
• To establish health-based guidance and reference values for BHT acid interpretation.

Main Methods:

• Development of a sensitive analytical method for urinary BHT acid determination.
• Application of the method in environmental and occupational HBM surveys.
• Derivation of health-based guidance and reference values for BHT acid.

Main Results:

• BHT acid was detected in the vast majority of urine samples analyzed.
• This indicates widespread exposure to BHT across different populations in Germany.
• Established guidance and reference values provide a basis for interpreting exposure levels.

Conclusions:

• Human biomonitoring effectively reveals widespread BHT exposure in Germany.
• Variability in BHT metabolism and excretion limits precise risk assessment, especially for children.
• Further research into human metabolism is crucial for accurate reverse dosimetry and risk evaluation.