Push Boundaries in Every Session: Single-serve effervescent tablets deliver a controlled combination of electrolytes and B vitamins, making hydration precise and accessible wherever your sport takes you Build on Proven Science: Developed with elite athlete insight and rigorous research, these tablets offer targeted levels of sodium, potassium, calcium and magnesium to support normal muscle function and electrolyte balance Prepare for Peak Performance: Features vitamin B1 and B2 to contribute to normal energy-yielding metabolism and carbohydrate conversion, and B6 to support protein metabolism during effort Trust in Uncompromising Standards: Each batch is tested for banned substances, ensuring confidence and reliability for athletes determined to advance at every level You can’t Beat the Science: Every SiS product is driven by research, developed with elite athletes, and tested with precision to deliver reliable, evidence-based performance nutrition for athletes at every level