P.S.P. – Physique Stimulating Pre-workoutP. S. P. Physique Stimulating Pre workout Metabolic Nutrition P. S. P., available at Natty SuperStore, is a powerful, clinically dosed combination of compounds that will deliver killer pumps and sharp focus. It is a non stim pre workout that can be taken at night without disrupting sleep. L citrulline is an amino acid. It increases vasodilation by increasing plasma arginine levels. It is very effective at increasing nitric oxide (NO), since