Research
Adherence
Dietary supplements carry a risk of positive doping results due to contamination or inaccurate labeling, and athletes should consult sports nutrition professionals.
Always assume supplements may be contaminated with prohibited substances. Consult a sports nutrition professional. Use third-party tested products. The risk of a positive doping test is real.
StrongSupportsHIGH confidence
There are potential costs associated with all dietary supplements, including the risk of a positive doping result as a consequence of the presence of prohibited substances that are not declared on the label.
Why this rating
The paper cites multiple studies showing contamination and inaccurate labeling.
Source
The use of dietary supplements by athletes
Ronald J. Maughan et al. · Journal of Sports Sciences · 2007
DOI 10.1080/02640410701607395
narrative_review · n=310Cited 307×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Creatine supplementation improves performance in strength and power events by increasing muscle creatine and creatine phosphate, but not all athletes benefit equally.Strong
- Caffeine improves performance in endurance and high-intensity exercise through mechanisms involving reduced perception of fatigue and enhanced central drive, with benefits seen at low doses.Strong
- High-protein diets and protein supplements are not essential for athletes, as a varied diet meeting energy needs provides sufficient protein for muscle maintenance and growth.Good
Related findings · Adherence
- Regular physical activity (at least 150 minutes/week of moderate-intensity) reduces all-cause and cardiovascular mortality by 20-30% and lowers the risk of type 2 diabetes by 25-35%.Strong
- Increasing physical activity from a sedentary lifestyle to an active one in middle adulthood significantly reduces the risk of coronary events compared to remaining sedentary.Strong
- Resistance exercise is the only intervention capable of consistently restoring muscle function and strength in sarcopenia, partially overcoming age-related anabolic resistance.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →