Which of the following can help prevent lead absorption in the body?

The correct answer highlights the importance of specific nutrients that play a key role in preventing lead absorption in the body. Iron, calcium, and vitamin C all contribute significantly to this protective mechanism.

Iron is particularly crucial because adequate iron levels in the body help to reduce the absorption of lead in the gastrointestinal tract. When the body is deficient in iron, it can lead to higher lead absorption, as the body will absorb lead more readily when it lacks sufficient nutrients.

Calcium serves a similar function by competing with lead for absorption in the body. Higher levels of calcium can effectively decrease the amount of lead that enters the bloodstream. This is especially important in populations at risk for lead exposure, such as children, as they may be more susceptible to lead poisoning.

Vitamin C, known for its antioxidant properties, can enhance the immune system and help mitigate the damaging effects of lead within the body. Additionally, vitamin C assists in the metabolism of iron and can improve iron absorption, further supporting the body's defenses against lead.

In summary, the combination of iron, calcium, and vitamin C is effective in creating a nutritional barrier against the harmful effects of lead absorption, making this choice the most appropriate answer to the question.