What Our Gearhead(R) Experts Are Saying:"I started keeping the Science in Sport Hydro Powder in my pack on every outing, and it became a non-negotiable fast. The single-serve sachets dissolve completely in a water bottle in seconds, and I noticed a real difference in how I felt on longer hot-weather efforts when I was consistent about hitting one every hour compared to just drinking plain water."Hydration is one of those things that sounds simple until you realize how many days go sideways because of it. The Science in Sport Hydro Powder is built to take the guesswork out of staying on top of fluid and electrolyte replacement, whether you are deep into a long trail day, pushing through a hot afternoon training block, or just trying to stay sharp through a busy travel day. Each 4. 1-gram sachet delivers 1,576mg of five key electrolytes, including sodium, potassium, calcium, magnesium, and chloride, replacing what sweat takes out and helping your body absorb and retain fluid more efficiently than water alone. Vitamin C supports energy production and immune function through back-to-back training days, while Vitamins B6 and B12 help reduce tiredness and fatigue, so the final miles of a long effort do not have to feel like survival. Sugar-free and fast-dissolving, the Hydro Powder mixes clean into 500ml of cold water and is Informed Sport certified for athletes who need to know exactly what is in their kit.