Why creatine and electrolytes belong in the same glass

Most daily formulas pick a lane. Creatine for the gym. Electrolytes for hydration. Dosys runs creatine and electrolytes in one stick, and the reason is not marketing convenience. The two solve different problems in the same muscle, and they happen to be easier to remember together.

Where muscle energy comes from

Every contraction is paid for in ATP, the cell's energy currency. Muscle only stores enough ATP for a few seconds of maximal effort, so it has to rebuild it as fast as it burns it. The fastest route is the phosphocreatine system: phosphocreatine hands a phosphate to spent ADP and turns it back into usable ATP on the spot.

The more phosphocreatine sitting in the muscle, the faster you recharge between hard efforts. That is the whole mechanism behind creatine. Supplementing raises the muscle's phosphocreatine reserve, which is why the best-documented effect is in repeated short, high-intensity work: sprints, sets, hill repeats, the last hole of the round.

What creatine does with water

Creatine is osmotically active. As it enters the muscle cell, water follows. In the first weeks that can add up to about a kilo on the scale, stored inside the muscle rather than under the skin.

Two things follow from that. First, creatine does not dehydrate you. This was a common worry for years, and the reviews that looked at it directly found the opposite: no increase in cramping or dehydration, including in hot conditions. Second, the muscle is now holding more water, and where water sits in the body is governed by electrolytes. Which brings us to the other half of the stick.

The electrolytes, one by one

Sodium

Sodium is the electrolyte you lose most of in sweat, and how much varies wildly between people. In marathon runners, sweat sodium can differ several-fold from one person to the next. The American College of Sports Medicine's guidance on fluid replacement is blunt about it: during prolonged exercise, replace sodium along with the water, because water alone dilutes what is left.

A Dosys stick carries 235 mg of sodium. That is about a tenth of the daily reference intake, a daily-life dose rather than a race-day one. It is enough to make a glass of water a better glass of water, not a salt bomb.

Potassium

Potassium sits mostly inside the cell and moves out of working muscle during exercise. It is also the electrolyte most people are short on. The European Food Safety Authority sets the adequate intake at 3,500 mg a day, and typical diets fall well under it. The 129 mg in a stick is a top-up, not a fix. Food does the heavy lifting on potassium. The stick makes sure the daily baseline is not zero.

Magnesium

Magnesium takes part in energy metabolism and normal muscle function, and intake is frequently below recommendations, especially in people who train. We include 56.5 mg as magnesium citrate, which is 15% of the daily reference.

One honest note. If you take magnesium hoping it cures cramps, a Cochrane review found no reliable effect in the general population. Magnesium is in the stick for what it does every day, not as a cramp cure.

Taurine

Taurine is not strictly an electrolyte, but it lives in the same place: the muscle cell, where it takes part in calcium handling during contraction. A meta-analysis of single doses between 1 g and 6 g found a small improvement in endurance performance. There is 1 g in each stick.

Why one stick instead of two products

The honest answer is behavioural. Creatine only works if you take it every day for weeks. Electrolytes are most useful on the days you do not think about them. A single unflavoured stick that goes in the first glass of water solves both at once, and it removes the tub, the scoop and the shaker from the routine entirely.

The doses sit where the evidence is: 5 g of Creapure creatine, the amount most of the research used, and electrolytes low enough to take on a rest day and every day after it.

One stick a day, every day.

Sources

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6. EFSA NDA Panel. Dietary reference values for potassium. EFSA Journal. 2016;14(10):4592. efsa.onlinelibrary.wiley.com
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9. Bakker AJ, Berg HM. Effect of taurine on sarcoplasmic reticulum function and force in skinned fast-twitch skeletal muscle fibres of the rat. J Physiol. 2002;538(Pt 1):185–194. pmc.ncbi.nlm.nih.gov/articles/PMC2290020
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