Proper hydration isn't about drinking more water; it's about drinking water with the electrolytes your body truly needs: sodium, potassium, and magnesium in functional, not symbolic, amounts.
A familiar scenario
7:05 AM. The alarm rings. You drop the kids off at school, an express workout before work, endless meetings, pending errands… and by 4 PM, your brain just isn't responding. You drink water. It doesn't help.
The problem isn't how much water you drink, but what's in that water. When your life is intense, you lose water and electrolytes. Replenishing only water can leave you with that "20% battery" feeling that just won't go away.
What water alone cannot do
Electrolytes (sodium, potassium, magnesium) are electrically charged minerals that enable:
- Your nerves to send signals (hence the "brain fog" when they're lacking).
- Your muscles to contract without cramps.
- Fluid to be distributed correctly inside and outside cells.
In an active life, you lose both: water and electrolytes. Replenishing them together is the difference between true hydration and remaining "flat."
Signs you're falling short on hydration
Your body warns you before collapse. Signs of mild dehydration that we often ignore:
- Thirst (yes: by the time you feel thirsty, it's already too late).
- Headache or "brain fog" feeling.
- Unusual fatigue for no apparent reason.
- Cramps or muscle spasms.
- Darker and less frequent urine.
- Slight dizziness when standing up quickly.
If two or more of these sound familiar, it's probably not "just tiredness."
Electrolyte powder vs. isotonic drinks: why not all work the same
You walk through the supermarket and see drinks promising "mineral salts" or "instant rehydration." But there's a trick. Many isotonic drinks provide:
- Low sodium (the electrolyte you lose most when sweating).
- Lots of sugar (up to ~22g per 500ml bottle).
- Colorants and preservatives to extend shelf life.
- A quick energy boost... followed by a crash.
That's not real hydration. It's a soft drink with sports marketing.
Checklist: how to read an electrolyte label in 20 seconds
- Sodium in hundreds of milligrams (≈300–500 mg or more per serving).
- Potassium and magnesium with declared amounts (not "traces").
- 0g sugar if you're looking for clean hydration without empty calories.
- Short ingredient list, without colorants (E-XXX) or preservatives.
- Transparent origin and manufacturer (where and by whom it's made).
Electrolyte comparison: LIT vs Aquarius vs Electrolit
We've compared the official labels (Amazon.es and manufacturers). Values per standard serving:
| Product | Sodium (mg) | Potassium (mg) | Magnesium (mg) | Sugar (g) | Calories (kcal) | Colorants | Preservatives | Origin |
|---|---|---|---|---|---|---|---|---|
| LIT (1 sachet / 500 ml) | 500 | 150 | 60 | 0 | 7.2 | No | No | Spain |
| Aquarius Lemon (500 ml) | ~1001 | n/d1 | 01 | 221 | 901 | Yes1 | Yes1 | Spain1 |
| Electrolit Berry Bliss (625 ml) | 4302 | 4902 | 302 | 312 | 1302 | Yes2 | Yes2 | Mexico2 |
Quick read: if your goal is to hydrate without sugar and with an effective dose of sodium, prioritize electrolyte powders with short labels over sugary isotonic drinks with low sodium.
The simple rule that works (without overcomplicating things)
- Hydrate proactively (don't wait until you're thirsty to drink).
-
Prioritize water with electrolytes during:
- Intense or long workouts.
- Very busy days (long shifts, travel).
- When you notice any of the above signs.
- Every 2–3 hours on very active days.
- Recommended volume: 500–700 ml per serving with electrolytes.
- Adjustment signal: if you end up with a headache, cramps, or feel "off," hydrate earlier or increase the volume next time.
What if I do intermittent fasting?
Each LIT sachet has 7.2 kcal. In pragmatic approaches, 7.2 kcal are considered compatible due to their minimal metabolic impact, below 40kcal. If you follow a medical or very strict protocol, adhere to that criterion.
FAQ: Quick questions about electrolytes
Questions and answers about electrolyte hydration.
Does sugar hydrate?
No. Hydration depends on the balance of water and electrolytes (especially sodium). Sugar provides quick energy and flavor, but not functional electrolytes.
Do I only need electrolytes if I compete or train hard?
No. They are useful when you lose fluids: long shifts, travel, intense stress, or weeks with high activity.
Can I take electrolytes without exercising?
Yes. They are essential daily minerals. Take them as needed and according to your sensations (unless there are specific medical restrictions on sodium).
Verified Technical Data Sheet: LIT Electrolytes
Composition per sachet
- Sodium: 500 mg
- Potassium: 150 mg
- Magnesium: 60 mg
- Sugar: 0 g
- Calories: 7.2 kcal
Ingredients (6)
Acidifier (citric acid), sodium chloride, magnesium malate, potassium chloride, lemon flavor, sweetener (steviol glycosides).
Certifications
- No colorants or preservatives
- Vegan-friendly
- Gluten-free
- Dairy-free
- Made in Spain
How to use
Dissolve 1 sachet in 500 ml of water (adjustable between 500–700 ml depending on preferred flavor intensity).
Ideal for
- Hydration during exercise and post-workout recovery
- Electrolyte replenishment during intermittent fasting (see "Fasting" section)
- Focus and clarity during afternoon fatigue
- Helps reduce the occurrence of cramps related to electrolyte loss
Data verified: October 30, 2025
