Electrolyte intake is key to staying hydrated and finishing strong in a triathlon of any distance. While there are many options of electrolyte products, First Endurance Electrolyte Fuel System delivers more electrolytes per serving than most other pills, powders and potions. One 31-gram scoop of EFS powder mixed with 12 ounces of water contains 1,000 milligrams total of the five electrolytes sodium, potassium, chloride, magnesium and calcium, along with the antioxidant vitamin C. While there's no protein in the product, there are two grams of free-form amino acids to help buffer muscles and delay fatigue as effectively as protein without any of the nutrient's digestive problems. Delivering 96 calories per serving, EFS's high-glycemic combination of glucose, dextrose and sucrose helps speed carbohydrate absorption. The line's four fruit flavors include a low-sweetness grape. A 25-serving canister retails for $21.95. Inside Triathlon September 2008

Containing an ideal blend of Glutamine, Branched Chain Amino Acids, high-glycemic complex carbohydrates, simple car- bohydrates, antioxidants and electrolytes to provide endurance athletes the nutrients they need to fuel working muscles and increase endurance during exercise and prevent cramping and dehydration, First Endurance EFS is also now available in grape and fruit juice flavors Road Bike Action Magazine November/December 2008

One of the most popular sports drinks on the market now had two new flavors. Each scoop packs 1,000mg of electrolytes, which means you won’t need to take in any additional salt tables to keep the muscles firing. A serving of EFS also provides 24grams of carbohydrates and 2,000mg of amino acids. Triathlete August 2008

By delivering 1,000mg of the five essential electrolytes needed for optimum performance, EFS (Electrolyte Fuel System) eliminates the need for any additional electrolyte supplements while training or racing. EFS is essential in helping prevent cramping and dehydration, and maximizing endurance. By using natural ingredients, EFS is low in sweetness and does not need to be diluted. First Endurance is the official nutrition sponsor of Team Colombia, Astana, Gerolsteiner and Bissell. MSRP: $21.95; flavors: Lemon-Lime, Tangerine, Grape, Fruit Punch. Cycle Sport August 2008

1st ENDURANCE ELECTROLYTE FUEL SYSTEM EFS combines three different carbohydrates with a complete electrolyte profile, which means you won't have to chug a sports drink and pop pills. The high-glycemic drink yields a 7% carbohydrate solution, which is ideal for absorption during hard efforts. Triathlete June 2008

First Endurance EFS Sports Drink With such notables as Levi Leipheimer on their roster it's clear that 1st Endurance makes solid "fuel system" product. The EFS tastes good and the gang at 1st Endurance claim it improves energy and endurance and prevents cramping. Scoop it up, drop it in, add some water and your off. Some serving details: 24g of carbs, 270mg of Sodium, 160mg of Potassium and 120mg of Vitamin C. You won't ride like Levi or, for that matter, ride along side him but you'll certainly be using the product he consumes and maybe, just maybe, you'll be able to power up the local ramp much easier. ROAD October 2006

Containing everything you need to maximize endurance, First Endurance's Electrolyte Fuel System energy drink uses electrolytes to ensure your body stays hydrated and so avoid cramping, amino acids to delay fatigue, plus 200 percent of the RDA for Vitamin C to help your immune system. And with EFS available in Lemon-Lime and Tangerine flavours, this particular energy drink is also a taste sensation in your bidon. Procycling June 2006

EFS: Not just another sports drink. Click here to read full review. PezCycling News

Tasty and effective. The most effective sports drink is the one you'll actually use, says Mark Zalewski, who's found this new power potion to be pleasantly palatable and potent. more >> Rating: Cycling News Tech review (Nov 28, 2004)

First Endurance continues to stay at the forefront of endurance nutrition by developing EFS, a new energy drink that combines the latest clinical research with the input and feedback from elite endurance athletes. EFS contains an ideal blend of simple and complex carbohydrates, amino acids, antioxidants and electrolytes to provide endurance athletes the nutrients they need to fuel working muscles and increase endurance during exercise. Cycle Sport (Jan, 2005)

Endurance. Energy. Electrolytes. The three E's of First Endurance's new EFS Sports Drink are what you need to keep you properly fuelled when training or racing. The addition of amino acids to EFS delay mental fatigue, and so increase endurance, complex carbohydrates deliver energy to the muscles, while the electrolytes help the body to absorb water. And lemon-lime and tangerine flavours ensure that this effective energy drink also taste good. Procycling (Jan, 2005)

First Endurance claims a first: a Lemon-lime and Tangerine flavored sports drink with five electrolytes: sodium, potassium, chloride, magnesium and calcium, three carb sources for quick and sustained energy and aminos that help delay fatigue. Triathlete Magazine (Feb, 2005)