Chronic toxicity testing involves exposure durations of how long?

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Multiple Choice

Chronic toxicity testing involves exposure durations of how long?

Chronic toxicity testing looks at the effects that come from long-term, repeated exposure to a pesticide. Because these effects develop gradually and can involve cumulative damage to organs, metabolic changes, or other delayed outcomes, the study duration needs to be extended well beyond a single exposure. In practice, chronic studies are conducted for at least about 90 days and can run from several months to years, depending on the substance and regulatory requirements. That’s why 90 days to years best describes chronic toxicity testing. Shorter time frames—24 hours or less, a week, or a month—are used for acute or subacute assessments and don’t capture long-term effects.

Chronic toxicity testing looks at the effects that come from long-term, repeated exposure to a pesticide. Because these effects develop gradually and can involve cumulative damage to organs, metabolic changes, or other delayed outcomes, the study duration needs to be extended well beyond a single exposure. In practice, chronic studies are conducted for at least about 90 days and can run from several months to years, depending on the substance and regulatory requirements. That’s why 90 days to years best describes chronic toxicity testing. Shorter time frames—24 hours or less, a week, or a month—are used for acute or subacute assessments and don’t capture long-term effects.

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