Which of the following is true about mineral bioavailability?

• A. All minerals have the same bioavailability regardless of dietary source.
• B. Bioavailability of minerals is not affected by the presence of other nutrients.
• C. Mineral bioavailability is only important for vitamins, not for minerals.
• D. Mineral bioavailability refers to the proportion of a mineral that is absorbed and utilized by the body.

Answer: (D)

Verified step by step guidance

1. Understand the concept of mineral bioavailability: Mineral bioavailability refers to the proportion of a mineral that is absorbed and utilized by the body. This is influenced by various factors, including dietary source, presence of other nutrients, and individual physiological conditions.
2. Evaluate the first statement: 'All minerals have the same bioavailability regardless of dietary source.' This is incorrect because the bioavailability of minerals can vary depending on the dietary source. For example, minerals from plant sources may be less bioavailable due to the presence of compounds like phytates that inhibit absorption.
3. Evaluate the second statement: 'Bioavailability of minerals is not affected by the presence of other nutrients.' This is incorrect because the presence of other nutrients can influence mineral absorption. For instance, vitamin C enhances iron absorption, while calcium can compete with magnesium for absorption.
4. Evaluate the third statement: 'Mineral bioavailability is only important for vitamins, not for minerals.' This is incorrect because bioavailability is a critical concept for minerals themselves, as it determines how effectively the body can utilize them.
5. Conclude with the correct understanding: Mineral bioavailability refers to the proportion of a mineral that is absorbed and utilized by the body, and it is influenced by factors such as dietary source, presence of other nutrients, and individual physiological conditions.