All are true about glutathione except?
**Core Concept**
Glutathione is a tripeptide composed of glutamine, cysteine, and glycine, playing a crucial role in antioxidant defense, cellular detoxification, and maintaining the redox balance in the body. It is synthesized in the cytosol of cells from its constituent amino acids.
**Why the Correct Answer is Right**
Glutathione acts as a cofactor for enzymes such as glutathione peroxidase, which reduces hydrogen peroxide and other reactive oxygen species, thereby preventing oxidative damage to cellular components. It also participates in the detoxification process by conjugating with electrophilic compounds, making them more soluble and easier to excrete. Additionally, glutathione is involved in the reduction of disulfide bonds in proteins, maintaining their proper structure and function.
**Why Each Wrong Option is Incorrect**
**Option A:** This statement might be true, but without specific details, it is hard to determine its accuracy. However, if it is related to glutathione's antioxidant properties, it is likely correct.
**Option B:** Glutathione is indeed a tripeptide composed of glutamine, cysteine, and glycine, so this statement is true.
**Option C:** This statement might be true, as glutathione is involved in various cellular processes, including detoxification and antioxidant defense. However, without more context, it is difficult to assess its accuracy.
**Clinical Pearl / High-Yield Fact**
It is essential to note that glutathione levels decrease with age, and its deficiency has been linked to various diseases, including cancer, neurodegenerative disorders, and cardiovascular disease.
**Correct Answer:** A.