Which of the following is a key feature of Hyperhomocysteinemia?

A Elevated levels of homocysteine in the blood due to genetic mutations
B Increased risk of cardiovascular disease due to endothelial dysfunction
C Impaired absorption of dietary folate and vitamin B12
D All of the above ✓

Explanation

Hyperhomocysteinemia is characterized by elevated levels of homocysteine in the blood, often due to genetic mutations or impaired absorption of folate and vitamin B12, and is associated with an increased risk of cardiovascular disease.

Source

Biochemistry textbooks by Stryer and Berg
Metabolic and Nutritional Disorders Nutrition and Biochemistry Amino Acid Metabolism Hard MEDICAL Confidence: high