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Developed in 1995 by scientist and ultramarathoner Karl King, SUCCEED! Electrolyte Caps have become The Gold Standard for Electrolyte Replacement®.



S! Caps are 100% electrolytes. Beware of imitations that use ineffective, non-electrolyte fillers such as sugars or the carbohydrate maltodextrin.

1. Alleviation of cramping2. Buffers to help stabilize the stomach3. Protection against potentially fatal hyponatremia4. Sodium and potassium in effective amounts5. Phosphate and citrate for energy production6. S! Caps is the ONLY electrolyte product that delivers the correct ratio of electrolytes (cations and anions)

Check out the Trail Runner Nation podcast on electrolytes!



Electrolyte supplementation is primarily about sodium replacement, and S! Caps deliver more for your money than any other supplement. Don’t waste your money on imitations that supply less than half the sodium of S! Caps and will let you down when the heat is on. Of course, others have tried to imitate this formulation, but have failed to deliver a product as good as S! Caps.

Nutrition Facts labels normally list sodium content as the element, but some products have misleading labels that express the sodium content as sodium chloride (table salt). This leads the unsuspecting reader to think that they are getting more sodium because the numbers are large.


The S! Caps label lists sodium as the element, 341 mg per capsule. If you want to compare to other products that list the sodium as sodium chloride, S! Caps supply 867 mg of sodium as sodium chloride.


We encourage you to read labels so that you understand why S! Caps are the superior electrolyte supplement. See our Integrated Solution page to see why we don’t load up our formulations with the “kitchen sink” list of ingredients that are present in quantities too small to have any real effect.


S! Caps provide all of the major blood plasma electrolytes that other formulations are missing [ sodium, potassium, chloride, bicarbonate, and phosphate ]. S! Caps contain ONLY electrolytes with no fillers or vitamins that aren’t really needed in an electrolyte formulation.


What about magnesium? “Magnesium is another intracellular ion that, like potassium, is lost in sweat and urine during exercise. But the losses are trivial. There is no published evidence showing that magnesium deficiency is either common amongst the physically active, or that magnesium supplementation can either increase the intracellular magnesium stores, or enhance performance.” Dr. Timothy Noakes Sports Nutrition: Fluid, Electrolytes, and Minerals (Report from the World Forum on Physical Activity and Sport, Quebec City, Canada, 1995.)

S! Caps give you the electrolytes you need without unneeded stuff taking up room in the capsule.


Heavy sweating during athletic performance lasting for many hours can cause loss of critical electrolytes from blood plasma. Moderate loss of electrolytes can degrade performance, while heavy losses can lead to hyponatremia (low blood sodium) that can cause collapse and death in extreme cases. Sports drinks can provide adequate sodium input for a few hours of exercise, but are insufficient over longer periods. Energy bars and gels are low in sodium and should be supplemented with electrolytes. SUCCEED! BUFFER/ELECTROLYTE CAPS provide electrolytes that are commonly found in blood plasma (sodium, potassium, chloride, bicarbonate, phosphate), in the proper proportions for hours of exercise. When taken with sufficient water, they help the body maintain good hydration status, which allows performance at a high level. As we claimed back in 1995 before others had even thought about appropriate electrolyte replacement in endurance events: they also contain a chemical buffering system that neutralizes the acids formed during heavy exercise. Neutralization of excess acid will help performance and reduce the nausea associated with exercise in the heat. Maintenance of proper electrolyte levels will reduce swelling of hands and feet after many hours of exercise, and that will reduce “hot spots” and blisters on the feet. The buffers in S! Caps also help soothe the stomach.


How to use:


See our Sodium and Dehydration article for general information on running in hot weather.


Always take with water or sports drink. If taken with no fluid, the result can be temporary stomach queasiness. The electrolytes in SUCCEED! Buffer/Electrolyte Caps will help water empty rapidly from the stomach, improving hydration status. They will dissolve in minutes after being swallowed.


If sweating very heavily, use 2 caps per hour. For moderate sweating, use 1 cap per hour. In cool weather or with very light sweating, use 1 cap per 2 hours.

If you expect to be sweating heavily, take one capsule with at least a cup of water before starting your run. More is not always better! There will not be significant benefit in exceeding these amounts.


The simplest way to pace your electrolyte intake is to consult your stomach. If your stomach is full of fluid and sloshing, you are overdue for electrolyte intake. Take an S! Cap and see how you feel in 10-15 minutes. If the sloshing is gone, you’re good to go. If you still have too much fluid in your stomach. Take another S! Cap.


If your electrolyte intake is moderate, and your stomach starts to feel queasy, take an S! Cap. It is better take the caps in moderation and consult your stomach for directions on when to take the next one.


Store in a dry location, away from high heat.



Serving Size: 1 capsuleServings per container: 100

Amount per serving % Daily Value Sodium 341 mg 13.6 Potassium 21 mg Percent daily values based on a 2,000 calorie diet. Note: as is the normal practice for nutritional labels, these are expressed as the weight of the element. Some manufacturers express the content of their electrolyte products as a compound such as sodium chloride or calcium carbonate. Non-chemists may be misled into thinking that they are getting more of the element than they really would. SUCCEED! doesn’t wish to mislead anyone – we tell you exactly what you get, fair and square. If you wish to compare on the basis of Sodium Chloride (NaCl) S! Caps have 867 mg of sodium as sodium chloride.

Regular table salt provides sodium, but is un-buffered. S! Caps provide buffers against the acid formed during carbohydrate metabolism (bicarbonate, citrate, and phosphate). These will help keep your stomach from getting too acid. Citrate and phosphate are also used in the biochemistry of energy production.

Ingredients list: Sodium Chloride, Sodium bicarbonate, Sodium citrate, Sodium phosphate, Potassium Chloride

Succeed S!Caps Electrolyte Capsules

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