National Academy of Sports Medicine (NASM) Performance Enhancement Specialist (PES) certification Practice Exam

Question: 1 / 400

Which of the following has research shown to be an effect of excessive intake of vitamin A?

Increased muscle mass

Reduced bone mineral density

Research indicates that excessive intake of vitamin A can lead to reduced bone mineral density, making this the most accurate choice in relation to the effects of hypervitaminosis A (vitamin A toxicity). High levels of vitamin A can disrupt the balance between the processes of bone formation and resorption, ultimately leading to a decrease in bone density. This can increase the risk of fractures and osteoporosis over time.

In contrast, increased muscle mass, enhanced immune response, and improved cardiovascular health are not typically associated with excessive vitamin A intake. While vitamin A is essential for various bodily functions, including immune response and vision, excessive amounts do not confer additional benefits and can be harmful, particularly to bones. Thus, the correlation between excessive vitamin A and reduced bone mineral density is well-documented, solidifying the choice as the correct answer.

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Enhanced immune response

Improved cardiovascular health

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