Following Vitamin Prevents Peroxidation of lipids of cellular level
**Core Concept**
Vitamin E is a lipid-soluble antioxidant that plays a crucial role in protecting cells from oxidative damage by preventing the peroxidation of lipids. It functions by scavenging free radicals and donating electrons to terminate the chain reaction of lipid peroxidation.
**Why the Correct Answer is Right**
Vitamin E achieves this by donating a hydrogen atom to the lipid radical, thereby converting it into a more stable lipid alcohol. This action prevents the propagation of the free radical reaction and protects the cell membrane from oxidative damage. The antioxidant properties of Vitamin E are mediated through its ability to donate electrons to the lipid radical, thereby stabilizing it and preventing further oxidation.
**Why Each Wrong Option is Incorrect**
**Option A:** is incorrect because Vitamin C is a water-soluble antioxidant that primarily functions in the aqueous phase of the cell, whereas Vitamin E is lipid-soluble and acts in the lipid bilayer of the cell membrane.
**Option B:** is incorrect because Vitamin A is primarily involved in vision, immune function, and reproduction, and does not have a direct role in preventing lipid peroxidation.
**Option C:** is incorrect because Vitamin K is involved in blood clotting and bone metabolism, and does not have antioxidant properties.
**Clinical Pearl / High-Yield Fact**
Vitamin E deficiency can lead to increased susceptibility to oxidative stress, which may contribute to the development of various diseases, including atherosclerosis and neurodegenerative disorders.
**Correct Answer: D. Vitamin E. Vitamin E.**