Which nutrient plays a crucial role in the regulation of gene expression and can act as a ligand for certain nuclear receptors?

A Vitamin D
B Vitamin A ✓
C Fatty acids
D Amino acids

Explanation

Vitamin A, particularly its active form retinoic acid, plays a crucial role in regulating gene expression by acting as a ligand for certain nuclear receptors, such as retinoic acid receptors (RARs) and retinoid X receptors (RXRs).

Source

Biochemistry textbooks, e.g., Stryer or Lehninger
Metabolic and Nutritional Disorders Nutrition and Gene Regulation Nutrient-Gene Interactions Hard NURSING Confidence: high