Which of the following nutrients is essential for the synthesis of carnitine, a molecule that plays a crucial role in fatty acid metabolism?

A Vitamin C
B Vitamin B6
C Vitamin B12
D Lysine ✓

Explanation

Carnitine is a molecule that plays a key role in the transport of fatty acids into mitochondria, where they can be oxidized for energy. Lysine is an amino acid that is required for the synthesis of carnitine.

Mnemonic

Lysine = Link to carnitine

Source

Biochemistry textbook by Stryer
Metabolic and Nutritional Disorders Nutrition Carnitine and Fatty Acid Metabolism Hard MEDICAL Confidence: medium