It appears Vitalijs Pavlovs’ latest experiment didn’t go as planned.
The 24-year-old Latvian hockey player tested positive for methylhexanamine, a "specified stimulant" on the World Anti-Doping Agency's prohibited list.
"The disciplinary commission unanimously concluded that the athlete had been negligent and had therefore committed an anti-doping rule violation," the IOC said in a statement.
The IOC announced on Sunday that Pavlovs, and Marina Lisogor, a Ukrainian cross-country skier, both had been expelled from the Sochi Olympics, bringing the total number of banned athletes to four.
All four cases involve stimulants that can be found in food supplements.
Pavlovs was tested after Latvia's 2-1 loss to Canada.
The Latvian forward, who plays for the Kontinental Hockey League's Latvia-based Dinamo Riga, said the team doctor told him to take the food supplements.
According to the official Olympic website, the IOC is expected to carry out some 2,453 tests -– 1,944 urine and 509 blood -- on participating athletes.