COMM: Brothers Alvaro and Tony have been working out since they were teenagers. Now at the ages of 49 and 50, the brothers’ combined weight is a whopping 241 kilograms. The same weight as 4,900 medium chicken eggs. COMM: Alvaro and Tony started to inject a mephentermine-based multi-vitamin stimulant known as Potenay B12 to help gain more muscle. Potenay B12 was originally developed for weakened horses and cattle, just found its way into the bodybuilding community in Brazil. COMM: Potenay B12 can become highly addictive and the misuse can trigger major heart, liver and kidney problems.