The Claim
In middle-aged and older adults with well-controlled type 2 diabetes, daily supplementation with 6 g of citrulline for 4 weeks increases log-transformed reactive hyperemia index (LnRHI) by 13% and increases calf muscle strength relative to body weight by 0.02 kg/kg, with these changes correlated (r = 0.37, p < 0.05).
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In middle-aged and older adults with well-controlled type 2 diabetes, taking 6 grams of citrulline daily for four weeks increases blood flow to small vessels by 13% and increases calf muscle strength relative to body weight by 0.02 kg per kg, and these two changes occur together.
See the scientific wording
In middle-aged and older adults with well-controlled type 2 diabetes, 4 weeks of daily citrulline supplementation (6 g/day) likely improves microvascular endothelial function, as measured by a 13% increase in log-transformed reactive hyperemia index (LnRHI), and enhances calf muscle strength relative to body weight by 0.02 kg/kg, with these changes correlated (r = 0.37, p < 0.05), suggesting a potential link between improved blood flow and muscle function in this population.
Citrulline is converted into arginine, which is used to make nitric oxide. Nitric oxide opens small blood vessels, improving blood flow to muscles. Citrulline also blocks an enzyme that steals arginine, making more of it available for nitric oxide production. Better blood flow delivers more oxygen and nutrients to muscle tissue, allowing muscles to generate more force.
What the research says
1 studyTaking 6 grams of citrulline daily for four weeks helped older adults with type 2 diabetes improve blood flow in their small vessels and slightly increase leg strength relative to their body weight, and these two improvements happened together.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.