L-Citrulline is a non-essential amino acid prized for boosting nitric oxide production, enhancing blood flow, and aiding in muscle recovery. The global L-Citrulline market was valued around USD 1.6-1.7 billion in 2023-24, and is forecasted to grow to about USD 2.5-2.6 billion by 2032 with a CAGR of ~5.2%. Key drivers include rising interest in fitness & sports nutrition, use in pre-workout supplements, health-conscious consumers, and clean-label / high-purity products. Leading formats are powders, capsules, and tablets, with online channels and pharmacies/hypermarkets being important distribution routes. Challenges include cost of high-purity grade, regulatory compliance, and consumer awareness.