Citrulline is a non-essential amino acid involved in the urea cycle and nitric oxide biosynthesis pathway, used as a nutritional supplement for sports performance and as a therapeutic agent in urea cycle disorders. Simson Pharma's Citrulline reference standard supports identity and quantitative testing across these pharmaceutical and nutraceutical applications.

Simson Pharma Global Ltd. (UK) and Simson Pharma Global LLC (USA) supply high-quality Citrulline Reference Standards, pharmacopoeial reference materials, and its related impurities to pharmaceutical manufacturers, CROs, analytical laboratories, universities, and regulatory organizations worldwide. To service the Europe and America market efficiently, Simson Pharma Limited has set up Simson Pharma Global Ltd. in United Kingdom and Simson Pharma Global LLC in USA respectively.