GLOSSARY

Citrulline Dose is citrulline consumed as an active amount, not automatically the full mass of a citrulline-malate blend.

Arginine is a substrate for nitric oxide synthase, while citrulline can contribute to circulating arginine through metabolism. This biochemical connection does not establish that every arginine or citrulline product improves blood flow or sporting performance. Citrulline malate contains a mixture whose actual citrulline amount and formulation should be checked. A transient muscle pump is not equivalent to long-term hypertrophy. Evaluate gastrointestinal tolerance, interacting exposures and the specific controlled evidence rather than accepting a nitric-oxide-booster label as a measured outcome.

Dietary nitrate can enter a nitrate-to-nitrite-to-nitric-oxide pathway involving oral bacteria and subsequent chemistry. Nitrate-rich beetroot preparations have been studied for exercise economy and performance, with effects varying by population and task. The nitrate content matters more than beverage volume alone. Antibacterial mouthwash can disrupt part of the oral pathway, but oral-health decisions need appropriate context. Increased nitric-oxide availability or a changed oxygen cost does not guarantee that every athlete will perform better in every event.

The dose refers to the amount of the relevant active ingredient, not necessarily the mass of powder or the number of scoops. A single dose, daily total and body-mass-relative dose describe different quantities. Larger amounts can increase adverse effects without improving performance. Loading, maintenance and acute timing are ingredient-specific strategies rather than universal rules. Check all products used together so that repeated ingredients do not create an unintended total intake.

A credible supplement claim needs relevant controlled evidence, an appropriate comparison and a meaningful outcome. Randomization, placebo control and blinding reduce different sources of bias but do not guarantee a useful result. Sample size, uncertainty, training status, sex, diet and protocol affect interpretation. A pooled estimate is not a promise to every individual. Mechanistic plausibility, a changed biomarker, exercise capacity and actual competition performance are distinct levels of information that should not be treated as interchangeable.

For example, a citrulline-malate label may state the mass of the mixture rather than the amount of citrulline. Check the formulation and the relevant trial before interpreting a serving. A transient muscle pump can be noticeable without proving more muscle growth or a meaningful advantage in the athlete's competition task.

Supplement safety depends on ingredient, dose, duration, health status and other exposures. Natural origin does not guarantee safety, and absence of a reported adverse event in a small trial does not establish long-term safety. Medication interactions, pregnancy, age and kidney or liver disease can change the decision. Distinguish an event occurring during use from a causally established adverse effect. New or severe symptoms require stopping the suspect exposure and appropriate assessment rather than increasing the dose to overcome poor tolerance.

Label accuracy, ingredient identity, potency, contamination control and manufacturing traceability are separate aspects of quality. A proprietary blend may conceal the amount of each ingredient, preventing comparison with research. A certificate of analysis applies to specified tests and samples, not every possible hazard. Verify the exact product and batch in an independent certification program when relevant. Good manufacturing practice and third-party testing can reduce certain risks without proving efficacy or guaranteeing that every batch is free of prohibited substances.