Which of the following is NOT a factor influencing how chemicals affect individuals?

• A. Diet
• B. Age
• C. Genetic makeup
• D. Persistence

Answer: (A)

How chemicals affect a person depends on who you are and what the chemical is like. Your age, genetic makeup, and even your diet can change how a chemical is absorbed, metabolized, and eliminated, which in turn changes the effect you experience. Diet matters because nutrients can influence absorption and detoxification pathways, and some foods can induce or inhibit enzymes that process toxic substances.

Persistence describes how long a chemical stays in the body or in the environment. If a chemical remains longer, it can prolong exposure and increase potential harm, altering the overall effect.

Because nutrition can modify how a substance is handled by the body, diet is indeed a factor in how chemicals affect individuals. The idea that diet is not a factor isn’t consistent with how toxicology explains variability in responses.