MET-Rx Thermo Surge 120 Tablets The Guarana and Yerba Mate in MET-Rx Xtreme Thermo Surge may actively help weight management. Thermo surge combines a collection of natural ingredients (Cinnamon, Dill Weed and Ginger) used to aid digestion along with your training programme. MET-Rx Thermo Surge 120 Tablets The Guarana and Yerba Mate in MET-Rx Xtreme Thermo Surge may actively help weight management. Thermo surge combines a collection of natural ingredients (Cinnamon, Dill Weed and Ginger) used to aid digestion along with your training programme.