Electrolyte Tablets vs Drinks: Which Suits Your Day?
Most advice on electrolyte tablets versus drinks treats it as a single decision. In practice, the right choice changes with the day you're having. A Tuesday at your desk, a sweaty two-hour ride, a long-haul flight and a bout of food poisoning all call for something different.
The short answer: for everyday hydration, electrolyte tablets in water usually make more sense. They're cheaper per drink, lower in sugar and easy to carry. Ready-to-drink sports drinks earn their place during long, hard exercise, when the carbohydrate is useful fuel. And when you're ill, a pharmacy rehydration solution is the right tool. Here's how that plays out, situation by situation.
First, how much do you need to drink?
The European Food Safety Authority sets adequate total water intake at 2.0 litres a day for women and 2.5 litres for men, from food and drink combined. The NHS suggests 6 to 8 glasses of fluid a day, more in hot weather or when you're active. Water, tea, coffee and milk all count.
Electrolyte tablets and drinks are optional on top of that. They're useful when you sweat more, travel, or simply find plain water hard to keep drinking.
Situation by situation
| Situation | Better fit | Why |
|---|---|---|
| Desk day or working from home | Tablets | Little sweat loss, no need for extra sugar; flavour helps you drink more |
| Hot day or a long commute | Tablets | Easy to carry; adds minerals to the water you're already drinking |
| Gym session under an hour | Tablets or water | Most people don't lose large amounts of sodium in a typical session |
| Long run, ride or match (90 minutes or more) | Sports drink or a sodium-led product with carbohydrate | You need fuel as well as fluid, and sweat sodium losses add up |
| Flight or travel day | Tablets | Small, light and get through airport security |
| Vomiting or diarrhoea | Pharmacy rehydration solution | Designed for that kind of fluid loss |
| Morning after a night out | Water first, tablets if you prefer the taste | Helps replace fluid; won't cure a hangover |
Everyday hydration
On an ordinary day you lose fluid steadily but not much sodium. Average adult salt intake in England is already 8.4g a day against a 6g guideline (NDNS, 2018 to 2019), so a salty or sugary drink adds things you probably don't need. A lower-sodium, potassium-led tablet is a better match. Our guide to high-potassium electrolyte tablets goes into the detail.
Long or intense exercise
This is where sports drinks were designed to work. The American College of Sports Medicine's position stand on exercise and fluid replacement says drinks containing sodium and carbohydrate can help during prolonged exercise. Sweat rates and sweat sodium vary a lot between people, so heavy sweaters and anyone training in the heat should plan for more sodium.
Illness
If you've had vomiting or diarrhoea, use an oral rehydration solution from a pharmacy. The NHS explains the signs of dehydration and when to get help. Everyday electrolyte tablets aren't designed for this.
After a night out
Alcohol makes you pass more urine, so you can wake up short on fluid. Water or an electrolyte drink can help with that part of it. Our post on hydration tablets and hangovers explains what they can and can't do.
Cost and convenience
A bottled drink includes the water and the bottle, which is why it costs more. In our price guide, the Lucozade Sport listings we checked cost 99p to £2.10 per bottle, while a HIRO serving costs about 53p to 80p. One tube of HIRO makes 10 drinks and weighs a fraction of a single bottle.
The trade-off is that tablets need water and a minute to dissolve. If you're out without a bottle, a ready-made drink is the practical option.
Sugar and calories
Many bottled sports drinks are built to fuel exercise, so they contain a fair amount of carbohydrate. Using the per-100ml values on the Tesco listing for Lucozade Sport Orange, a 500ml bottle works out at 31.5g of carbohydrate, including 17.5g of sugars, and 135 kcal.
That's useful during a long, hard session. On a desk day it adds up. The NHS advises adults to have no more than 30g of free sugars a day, and sugary drinks are one of the main sources.
Electrolyte tablets vary by brand. A HIRO serving has 5g of carbohydrate and 20 kcal, sweetened with sucralose.
Do electrolyte drinks hydrate you better than water?
Some do, under some conditions. In a study that ranked common drinks by how well the body retained them (the "beverage hydration index"), an oral rehydration solution and milk were retained better than still water over several hours. A standard sports drink performed much like water. Sodium content made a difference.
So plain water does the job for most people on most days. Electrolyte tablets are an optional extra: they make water more appealing for people who struggle to drink enough, and they add minerals on hot days, travel days or around exercise.
What's in HIRO Hydration
HIRO Hydration is built for everyday life: six key electrolytes and minerals, lower in sodium and higher in potassium. Potassium and magnesium support normal muscle and nerve function. It's not salty, not sweet, and was named Best Tasting Electrolyte Tablets by BBC Good Food.
| Per serving (2 tablets in about 300ml water) | Amount |
|---|---|
| Potassium | 300mg |
| Chloride | 180mg |
| Sodium | 116mg |
| Magnesium | 65mg |
| Zinc | 2mg |
| Manganese | 0.4mg |
| Energy / carbohydrate | 20 kcal / 5g |
Vegan, sucralose-sweetened and free from artificial colours. Choose from Lemon & Elderflower, Ginger & Lemongrass and Watermelon, or try all three in the Multi-Flavour Triple Pack.
A few practical tips
- Keep one tube at work and one in your bag.
- Carry a refillable bottle. Tablets only work if you have water to put them in.
- Use tablets on ordinary days and keep a carbohydrate drink for long sessions if you do them.
- Stick to two tablets per serving and drink plain water for the rest of your fluid.
- If you have a kidney condition, take medication that affects potassium or are pregnant, speak to your GP or pharmacist first. HIRO isn't recommended for anyone under 18.
Frequently asked questions
Are electrolyte tablets as effective as sports drinks?
They're designed for different jobs. For everyday hydration, tablets give you minerals without the sugar. During long exercise, a sports drink's carbohydrate is useful fuel.
Can I use electrolyte tablets every day?
HIRO is designed for daily use as part of a routine. Follow the serving on the label, and check with your GP or pharmacist first if you have a medical condition.
What's best when I'm ill?
For vomiting or diarrhoea, use a rehydration solution from a pharmacy and follow NHS advice on dehydration.
Do I need electrolytes for a 45-minute gym session?
Usually not, but many people like an electrolyte drink afterwards for the taste and minerals. Water is fine too.
Are electrolyte drinks bad for you?
No, but many are high in sugar and calories, which is worth knowing if you drink them every day rather than around exercise. Check the label for carbohydrate and sugars per bottle.
Is coconut water a good electrolyte drink?
Coconut water naturally contains potassium, and some people enjoy it as an alternative. Check the label, because sugar and mineral content vary between brands.