Most people reading this do not need an electrolyte drink. Harvard’s Nutrition Source is direct about it: there is no evidence these are a healthier choice than water for the average person. If you are exercising under 45 minutes and not in heat, plain water and normal meals cover it. If you genuinely do need one — long or intense exercise, heavy sweating, real heat, or illness with fluid loss — the spec that matters is sodium, and it varies more than fourfold between brands: LMNT has 1,000 mg a serving, Gatorade powder has 230 mg.
Medical note
General information, not medical advice. Electrolyte products deliver significant sodium. If you have high blood pressure, heart or kidney disease, or have been advised to limit sodium, talk to your doctor before adding one. If you are managing dehydration from illness — particularly in a child or an older adult — seek medical guidance rather than self-treating with a sports drink.
Key takeaways
- For everyday hydration in healthy people, water and balanced meals are enough. Electrolyte drinks are not a health upgrade.
- Sodium is the spec that matters, and brands differ enormously — from 230 mg to 1,000 mg per serving.
- Under ~45 minutes of exercise, not in heat, you almost certainly do not need one.
- You genuinely might if: exercising over an hour, sweating heavily, working in heat, or replacing fluids lost to illness.
- LMNT’s 1,000 mg is aimed at heavy sweaters and endurance athletes. For most people that is more sodium than they need from a single drink.
- Check the label for added sugar, sweeteners and colours — several popular products contain all three.
Do you actually need an electrolyte drink?
Probably not, and we would rather say so on a page about which one to buy than pretend otherwise.
Electrolytes — sodium, potassium, magnesium, chloride — are minerals your body needs to regulate fluid balance, nerve signalling and muscle function. You lose them in sweat. You replace them from food. For most people, most days, that loop closes without any intervention.
Harvard’s Nutrition Source puts it plainly: there is no evidence that electrolyte drinks are healthier than water for the average person, and consuming them in excess or unnecessarily may negatively affect health.
When you probably don’t need one
- A workout under about 45 minutes, in normal temperatures
- A walk, a yoga class, a gym session, a school run
- Everyday hydration alongside meals
- “Feeling tired” — that is rarely an electrolyte problem
When you might
- Exercise beyond about an hour, particularly at intensity
- Heavy sweating — some people lose considerably more sodium in sweat than others, and it shows as salt crust on skin or clothing
- Heat — outdoor work or training in summer
- Illness with fluid loss — vomiting or diarrhoea, where rehydration solutions have a genuine clinical role
- Certain medical conditions or medications that affect fluid and electrolyte balance — under medical guidance
If you are in one of those groups, the rest of this article is for you. If you are not, the honest recommendation is water, and to spend the money on something else.
Sodium is the number that matters
Almost everything else on an electrolyte label is a rounding error. Sodium is the electrolyte you lose most of in sweat and the one that actually drives rehydration, and it is where products differ most.
| Product | Sodium per serving | Aimed at |
|---|---|---|
| LMNT | 1,000 mg | Endurance athletes, heavy sweaters, low-carb diets |
| Liquid I.V. | 500 mg | General rehydration, travel, hangovers |
| Nuun Sport | 300 mg | Everyday exercise, low sugar |
| Pedialyte (powder) | 260 mg | Illness-related fluid loss |
| Gatorade (powder) | 230 mg | Team sport, carbohydrate as well as fluid |
That is a fourfold spread between the top and bottom of the table. Two products marketed for the same shelf can differ by 770 mg of sodium a serving, which is a meaningful amount of your daily intake.
Higher is not better. It is better for a specific situation. LMNT’s 1,000 mg exists for people losing a lot of salt through sustained sweating; for someone drinking it at a desk it is simply a large sodium load with no corresponding loss to replace. Most people who are not endurance athletes or heavy sweaters need less than that from a single drink.
Which electrolyte drink should you buy?
Match the product to the situation rather than looking for a single winner — the “best” one is genuinely different depending on why you are drinking it.
| Situation | Look at | Why |
|---|---|---|
| Endurance training, heavy sweating, heat | LMNT (1,000 mg) | Built for large sodium losses; no sugar |
| General rehydration, travel, long flights | Liquid I.V. (500 mg) | Middle ground; includes carbohydrate to aid absorption |
| Everyday workouts, want low sugar | Nuun Sport (300 mg) | Modest sodium, tablet format, low calorie |
| Illness with fluid loss | Pedialyte (260 mg) | Formulated for rehydration rather than performance |
| Team sport, need fuel as well as fluid | Gatorade (230 mg) | Carbohydrate is the point here, not the sodium |
| Everyday hydration, no heavy sweating | Water | Genuinely. Plus normal meals. |
A note on Pedialyte and children
Pedialyte occupies a different category from the sports products. It is an oral rehydration solution designed for fluid loss from illness, and that is a legitimate clinical use. Its powder formulation does contain dextrose, sucralose and Red 40, which is worth knowing if you avoid artificial colours.
Important: if a child or an older adult is dehydrated from vomiting or diarrhoea, that warrants a call to a doctor rather than a self-directed trip to the supplement aisle. Dehydration in those groups escalates faster than in healthy adults.
What else to check on the label
After sodium, four things are worth a glance:
- Added sugar. Carbohydrate genuinely aids fluid and sodium absorption and provides fuel during long efforts — it is not automatically bad. But sugar in a drink you sip at a desk is just sugar.
- Sweeteners and colours. Several popular products contain sucralose and artificial colours including Red 40. Neither is dangerous at these levels, but if you avoid them elsewhere you should know they are here.
- Potassium and magnesium. Usually present in small amounts. Nice to have, not decisive — you lose far more sodium than potassium in sweat.
- Servings per container and cost per serving. Powders and tablets vary a lot. Compare per serving, not per box.
The thing nobody sells you
A pinch of table salt in water with a squeeze of citrus replicates the core of what most of these products do, for almost nothing. It tastes worse, it is less convenient, and it will not arrive in an attractive sachet — but if the reason you are shopping is a hot day of gardening, it is worth knowing the pharmacology is not complicated.
We mention it because the electrolyte category has grown enormously on the implication that ordinary hydration is somehow inadequate. It usually is not.
Can you have too many electrolytes?
Yes, and this is the risk the category tends not to discuss.
Sodium is the main concern. Many people already exceed recommended sodium intake from food alone, and adding a 500–1,000 mg drink daily on top of that is a meaningful increase. For anyone with high blood pressure, heart disease or kidney disease, or who has been advised to limit sodium, that matters and warrants a conversation with a doctor first.
Harvard’s guidance notes that consuming these drinks in excess or when they are not needed may negatively affect health or performance, and that some ingredients — sugar among them — may not suit certain conditions.
There is also a rarer but serious risk in the other direction. Hyponatremia — dangerously low blood sodium — can occur when someone drinks very large volumes of plain water during prolonged endurance events without replacing sodium. This is the one scenario where electrolyte replacement is not a nicety but a safety measure, and it is specific to long-duration exercise rather than everyday life.
The sensible middle: drink to thirst, eat normal meals, and use electrolyte products when the situation actually calls for them.
Frequently asked questions
What is the best electrolyte drink?
It depends on why you need one. For heavy sweating and endurance exercise, LMNT delivers the most sodium at 1,000 mg per serving. For general rehydration, Liquid I.V. at 500 mg is a middle ground. For everyday workouts with low sugar, Nuun Sport at 300 mg. For most people on most days, plain water and balanced meals are sufficient.
Do I actually need an electrolyte drink?
Most people do not. Harvard’s Nutrition Source states there is no evidence electrolyte drinks are healthier than water for the average person. You may benefit if you exercise beyond an hour, sweat heavily, work in heat, or are replacing fluids lost to illness.
How much sodium should an electrolyte drink have?
It depends on your losses. Products range from 230 mg to 1,000 mg per serving — a fourfold spread. High-sodium options like LMNT suit endurance athletes and heavy sweaters; for someone doing a 45-minute gym session, that is more sodium than the situation requires.
Is LMNT or Liquid IV better?
Neither is universally better — they target different needs. LMNT has 1,000 mg of sodium with no sugar, aimed at heavy sweating and low-carb diets. Liquid I.V. has 500 mg plus carbohydrate to aid absorption, aimed at general rehydration and travel. Choose based on how much salt you are actually losing.
Are electrolyte drinks better than water?
Not for everyday hydration in healthy people. They become useful specifically when sodium losses are substantial — prolonged or intense exercise, heat, heavy sweating, or illness. Outside those situations water plus normal meals does the same job without the sodium load or added sugar.
Can you drink electrolyte drinks every day?
You can, but consider the cumulative sodium. Many people already exceed recommended sodium intake from food, and adding 500 to 1,000 mg daily is a meaningful increase. If you have high blood pressure, heart disease or kidney disease, or have been advised to limit sodium, check with your doctor first.
What about electrolyte drinks for a hangover?
They may help with the dehydration component, which is one part of a hangover. They will not address the rest of it. A product with moderate sodium and some carbohydrate, like Liquid I.V., is a reasonable choice — but water and time do most of the work.
Can I make my own electrolyte drink?
Yes. A pinch of table salt in water with a squeeze of citrus covers the essentials of what most commercial products deliver, at a fraction of the cost. It tastes worse and is less convenient, but the underlying chemistry is not complicated.
Is Pedialyte just a sports drink?
No — it is formulated as an oral rehydration solution for fluid loss from illness rather than for athletic performance, and it has a genuine clinical role there. Note that the powder contains dextrose, sucralose and Red 40. For a dehydrated child or older adult, seek medical guidance rather than self-treating.