L-Citrulline for Muscle Recovery

Research suggests that L-citrulline has been studied primarily as a biological marker of inflammation and oxidative stress in muscle damage contexts, rather than as a direct therapeutic intervention for muscle recovery. The available studies are animal-based experiments — specifically rat models of induced myopathy — that measured L-citrulline levels alongside other inflammatory markers to assess the effects of unrelated therapies such as low-level laser treatment and pulsed electromagnetic field therapy; notably, one 2010 study found that L-citrulline levels were elevated in injured muscle tissue and normalized following laser treatment, suggesting it may reflect inflammatory activity rather than drive recovery itself. The third linked study investigates leucine and appetite regulation in mice and does not address L-citrulline or muscle recovery in any meaningful way. Taken together, the evidence base here is extremely limited, indirect, and derived entirely from animal models, meaning no conclusions about L-citrulline supplementation for human muscle recovery can be drawn from these particular studies.