Matt Serra recently shared a disturbing story from the early stage of his competitive journey involving questionable pre-match advice from his longtime instructor Renzo Gracie. The Long Island native explained that before his very first mixed rules competition Gracie suggested he take multiple doses of Ripped Fuel, a stimulant supplement that has since been removed from the market and that nearly caused Serra to suffer a serious medical emergency during the match.
Speaking on the MMA History Podcast Serra revisited his debut event in Elizabeth New Jersey held at Dan Severn‘s school. At 22 years old and preparing for his first appearance in a sanctioned competition Serra asked Gracie what he should eat or how he should prepare. Instead of nutritional advice he was told to visit GNC and buy Ripped Fuel which at the time was marketed as an energy booster but later became associated with severe health risks.
“Renzo’s from the different side of the family not the Gracie diet side. He goes man go to GNC and take a Ripped Fuel. Back then it’s like one of those one pill you feel good all day type things. I’m thinking Renzo Gracie isn’t going to steer me wrong so I went and got a bottle of Ripped Fuel.”
What followed became a warning about following advice without understanding its effects. Serra admitted he took more than the recommended amount while waiting backstage.
“I’m backstage I’m a little nervous took one. [ ] it man I’m gonna take a couple more.”
The impact was immediate and frightening. Despite being in excellent condition Serra experienced intense tunnel vision and a dangerously elevated heart rate once the match began.
“Now it’s not even legal they took that off the shelves.”
Even though he controlled the bout Serra became completely exhausted and increasingly concerned about his physical state.
“I’m getting tunnel vision my heart’s speeding I’m like this competing is [ ] exhaustive. Meanwhile I’m on how many milligrams of that stuff I could have collapsed.”
Serra’s account mirrors other similar stories within combat sports. Joe Rogan has described his own alarming experience with the same supplement. During a jiu-jitsu class Rogan had to stop mid-roll after his heart rate spiked to roughly 120 beats per minute leaving him exhausted almost immediately.
The core issue with these aggressive stimulant products is that they are designed for short bursts of effort such as weight training rather than sustained output. Activities like jiu-jitsu wrestling and MMA require prolonged cardiovascular demand with minimal rest. When stimulants artificially elevate heart rate and blood pressure during these conditions the risk becomes severe.
Products like Ripped Fuel were later removed from shelves after being linked to major health incidents. While the supplement market has shifted toward different formulas the underlying lesson remains unchanged. What may seem helpful in one physical context can become extremely dangerous in another.
