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Chronic study on BHT in rats.

G Würtzen, P Olsen

    Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association
    |October 1, 1986
    PubMed
    Summary
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    Butylated hydroxytoluene (BHT) exposure in rats led to increased survival rates and a higher incidence of liver tumors, particularly in males. These findings highlight potential health risks associated with BHT consumption.

    Area of Science:

    • Toxicology
    • Carcinogenesis
    • Animal Studies

    Background:

    • Butylated hydroxytoluene (BHT) is a widely used antioxidant additive.
    • Understanding the long-term health effects of BHT is crucial for public health.
    • Previous studies have suggested potential health impacts of BHT.

    Purpose of the Study:

    • To investigate the effects of chronic BHT exposure on rat health and survival.
    • To determine the carcinogenic potential of BHT in a rodent model.
    • To evaluate dose-dependent responses to BHT administration.

    Main Methods:

    • Rats (F0 and F1 generations) were fed diets with varying BHT concentrations (0-500 mg/kg/day).
    • Body weight and survival rates were monitored throughout the study.

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  • Histopathological examination of liver tissues was performed to identify tumors.

    • Main Results:

    • BHT exposure resulted in dose-dependent reductions in body weight at weaning, especially in males.
    • Survival rates were significantly higher in BHT-treated rats compared to controls.
    • A statistically significant, dose-related increase in hepatocellular adenomas and carcinomas was observed in male F1 rats.
    • Female F1 rats showed a significant increase in hepatocellular adenomas only.

    Conclusions:

    • Chronic BHT exposure can increase survival rates in rats.
    • BHT demonstrates carcinogenic potential, inducing liver tumors in a dose-dependent manner, particularly in male rats.
    • Further research is warranted to elucidate the mechanisms underlying BHT's effects on carcinogenesis and survival.