An older person takes several vitamin and nutritional supplements every day. Which aging theory is supported by this behavior?

An older person takes several vitamin and nutritional supplements every day. Which aging theory is supported by this behavior?

• A. Free radical
• B. Somatic DNA damage
• C. Cross link
• D. Wear and tear

Answer: (A)

Taking vitamins and nutritional supplements daily aligns with the idea that oxidative damage from free radicals contributes to aging. The free radical theory holds that reactive oxygen species produced during normal metabolism and other processes cause damage to cells, proteins, lipids, and DNA over time. Antioxidants found in supplements help neutralize these reactive molecules, potentially reducing the accumulated damage associated with aging. That behavior specifically reflects an approach to counteract oxidative stress, which is the core idea of this theory. The other theories don’t fit as directly: somatic DNA damage emphasizes genetic mutations accumulating over time, cross-link theory involves sugars creating stiff cross-links in proteins and DNA, and wear and tear focuses on physical use and damage.

Taking vitamins and nutritional supplements daily aligns with the idea that oxidative damage from free radicals contributes to aging. The free radical theory holds that reactive oxygen species produced during normal metabolism and other processes cause damage to cells, proteins, lipids, and DNA over time. Antioxidants found in supplements help neutralize these reactive molecules, potentially reducing the accumulated damage associated with aging. That behavior specifically reflects an approach to counteract oxidative stress, which is the core idea of this theory. The other theories don’t fit as directly: somatic DNA damage emphasizes genetic mutations accumulating over time, cross-link theory involves sugars creating stiff cross-links in proteins and DNA, and wear and tear focuses on physical use and damage.