Georges St-Pierre: natty or not?
Likely natty Two-division UFC champion, MMA's greatest welterweight and its loudest clean-sport advocate
Short answer. Verdict: likely natty. At the peak physique on this page, Georges St-Pierre is 5'11" (180 cm) and 195 lbs (88.5 kg) at roughly 10% body fat. That works out to an FFMI of 24.6, against the ~25 mark cited as the natural ceiling.
No official record settles this. What follows is opinion and analysis based on public numbers — how we judge.
The numbers (estimated)
| Peak physique | Fight-night walking weight in his prime, around 189-195 lbs |
|---|---|
| Height | 5'11" (180 cm) |
| Weight | 195 lbs (88.5 kg) |
| Body fat | ~10% |
| FFMI | 24.6 — ~25 is the cited natural ceiling |
Era by era (estimated)
| Era | Year | Age | Weight | Evidence | Body fat | FFMI |
|---|---|---|---|---|---|---|
| Welterweight prime (fight night) | 2009 | 28 | 195 lbs (88.5 kg) | reported | ~10% | 24.6 |
| Middleweight return | 2017 | 36 | 184 lbs (83.6 kg) | reported | ~9% | 23.5 |
FFMI over time (estimated)
FFMI per era (values in the table above). Hover a point for details.
Note. Every number below is a weigh-in figure or our own photo read, not a measurement. See the methodology page for how we judge.
Georges St-Pierre spent his career on the other side of this site’s question — demanding the testing everyone else avoided.
The numbers
GSP fought at the 170-lb welterweight limit and walked into the cage around 189-195 lbs (86-88.5 kg) at 5’10” (180 cm) — an FFMI around 24 at fight-night hydration, top of the natural bands for a full-time professional athlete in his prime, and lower at his softer weights. His timeline is flat across fifteen years: the same walking weight from 2006 to retirement, a middleweight return in 2017 at 184 lbs (83.6 kg) that was mostly the same body with a bigger belt. The one media flag — a nutritionist-era story about 12 quick pounds in 2009 — partitions, per this site’s standard math, into creatine, glycogen and food on an already-trained frame: scale weight, not new muscle.
The context is what makes this page short. St-Pierre publicly pushed for enhanced VADA/WADA-style testing for his own fights, paid for it, fought his own promotion over it, and cited doping culture among his reasons for walking away in 2013. Athletes hiding something do not subpoena their own blood.
Verdict
Likely-natty. Natural-band numbers, a fifteen-year flat timeline, and the strongest voluntary-testing record in his sport’s history. The tripwire is academic for a retired champion; his legacy on this topic is the tests he demanded, not the ones he passed.
Common questions
Is Georges St-Pierre natty or on steroids?
This site rates Georges St-Pierre as likely natty. That is an opinion drawn from public numbers, not a statement of fact: the peak physique on this page works out to an FFMI of 24.6, against the ~25 mark cited as the natural ceiling.
Has Georges St-Pierre ever failed a drug test or admitted to using PEDs?
Nothing of the sort turned up in the sources on this page. Had it, the verdict would read confirmed instead of likely natty.
What is Georges St-Pierre's FFMI?
About 24.6. That comes from 5'11" (180 cm) and 195 lbs (88.5 kg) at roughly 10% body fat, normalized to 1.8 m. Drug-free lifters in the Kouri 1995 study topped out near 25.