GLOSSARY

D-Ribose refers to ribose, a pentose sugar involved in nucleotide structure. This role does not prove that extra intake improves performance in healthy athletes.

A compound's normal biochemical role is not enough to justify supplementation in a healthy trained athlete. Phosphate, inosine, ribose, coenzyme Q10 and other marketed products have distinct mechanisms and uneven performance evidence. Findings from clinical populations, laboratory markers or deficiency correction cannot simply be transferred to competition. Check the actual ingredient and protocol, recognize uncertainty and adverse effects, and prefer a meaningful measured benefit over a story about providing more cellular energy. Adding more products can also complicate interpretation.

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 compound involved in energy metabolism can be marketed as an ATP booster even when evidence for a meaningful sport outcome is limited. Separate the normal biological role from the actual supplementation trial. Review the population, formulation and uncertainty before committing cost or adding another variable to the athlete's plan.

Absorption, distribution, metabolism and elimination determine how an ingredient reaches circulation and tissues. Plasma concentration does not directly establish muscle uptake or a useful performance effect. Half-life describes a concentration decline under defined conditions, while time to peak describes when a measured maximum occurs. Food, formulation, repeated use and individual physiology affect these processes. A faster or larger blood peak is therefore not automatically evidence that a formulation is better for the athlete's intended task.