Water replaces water. Hard runs sweat out sodium, potassium, and magnesium, minerals water doesn't contain. Drinking more without replacing those just dilutes what's left.

Not for a hard run. Depending on pace and temperature, you can lose 500 to 1500mg of sodium per hour through sweat. 1000mg replaces what a serious session takes out, most electrolytes replace a fraction of that.

Any of the three works. Before on hot days or long runs, during for sessions over 60 minutes, after to recover what the run took out. Most runners find after the session is the easiest habit to build.

Half a sachet is enough. That gives you around 500mg sodium, plenty for a 5k or an easy effort. Save the full sachet for the sessions that actually wipe you out.

You can taste the sodium, but it's balanced, closer to a light sports drink than sea water. Most runners find it noticeably less artificial than standard tabs. The variety pack is the best way to find your flavour.

Zero sugar means zero sugar-related gut issues, which is the most common complaint with sports drinks. Mix with at least 500ml of water and you're unlikely to have any problems.

Yes. Alcohol depletes sodium and fluid faster than most runs do. A sachet before bed and one in the morning replaces what's missing. Same mechanism, different cause.

Yes. Any sustained effort that makes you sweat takes the same minerals out. The product is runner-native but the formula works for anyone who finishes a session feeling depleted.

No. You can buy one-off whenever you need. The subscription saves money per sachet and means you never run out mid-training block, but there's no obligation.

There's a 30-day money-back guarantee. If it's not right for you, you won't be out of pocket.