The B-side of dehydration: what happens in your body before you feel thirsty

1. What dehydration really is (and why it matters even if you're not thirsty)

Your body is approximately 50–60% water. This water isn't "running wild": it's managed by your kidneys, hormones, and key minerals called electrolytes, such as sodium, potassium, and magnesium. We speak of dehydration when you lose more fluid than you take in.

This can occur due to sweat (workouts, heat, very active days), breathing, urination, illnesses like fever, vomiting, or diarrhea, some medications, or simply not drinking enough throughout the day.

With just a 1–2% fluid loss relative to your body weight, your physical and mental performance can already be affected, even if you feel like you're "getting by." That's the flip side of dehydration: your body is just barely making it, but you haven't realized it yet.

2. What happens in your body before you realize it

While you continue with your day, many things related to your hydration and electrolytes are happening internally. This is a simplified version of what occurs when your body starts to dehydrate without you feeling thirsty yet.

a) Your heart and circulation work harder

When you lose fluid, your blood volume decreases. This means your heart has to pump harder to maintain blood flow, and oxygen transport becomes less efficient. In practice, you climb stairs or a hill you always do… and today it feels twice as hard.

b) Your brain slows down

The brain has a very high water content and is especially sensitive to dehydration. When you're short on fluids and electrolytes, you may notice:

• Difficulty concentrating and maintaining focus.
• "Brain fog."
• More carelessness and silly mistakes.
• Worse mood and irritability.

It's not just mental fatigue: it's working with less fuel than you need.

c) Muscles lose fine coordination

Electrolytes allow muscles to contract and relax properly. When there's an imbalance in minerals like sodium, potassium, and magnesium, you may experience:

• Cramps in calves, feet, or hands.
• Muscle stiffness and a feeling of "clumsy legs."
• Worse-than-usual technique in simple workouts.

d) Your perception of effort changes

With mild dehydration, many people feel that everything is harder: the same workout, the same walk, or the same workday. Science has observed that dehydration can increase the sensation of effort and worsen mood.

3. Early signs of dehydration we often normalize

You don't need a heatstroke to be dehydrated. Mild dehydration creeps into your daily life with details that we often normalize:

• Thirst that appears mid-morning or mid-afternoon.
• Dry or "sticky" mouth.
• Mild headache, with no clear reason.
• Darker and less frequent urine than usual.
• Unusual fatigue, feeling "half-charged."
• Drop in concentration during long meetings or tasks.

If this happens often, your body might not be asking for more coffee, but for a better hydration plan.

4. Factors that dehydrate you more than you think

Beyond the classic "beach day" or long-distance run, there are many contexts where mild dehydration is almost inevitable if you don't take it into account.

Workouts and heat

Sweating means losing water and salts, especially sodium. If you only replenish with water, the balance remains off-kilter: the body recovers some of the fluid, but it doesn't recover all the electrolytes you've lost.

Very long and active days

Waking up early, commuting, working, running errands, exercising, returning home... and your bottle is still almost full. It's easy for mild dehydration to appear on "very LIT" days, even if you're in an office in Madrid, Barcelona, or any city with an intense pace.

Airplane travel

In the cabin, humidity is very low, you spend hours sitting, and you usually drink less than you need. Result: you arrive at your destination tired, bloated, and with less energy than you should have. Here, traveling hydrated with water and electrolytes makes a difference.

Digestive illnesses or fever

Vomiting, diarrhea, or fever accelerate fluid and electrolyte loss. The risk of dehydration increases, and special attention is needed, especially in children and the elderly.

Alcohol and excess caffeine

High consumption of alcohol and caffeine can increase fluid loss through urine, especially if they also displace the water or electrolyte drinks you should be consuming to maintain proper hydration.

Medications and medical conditions

Diuretics, certain treatments, diabetes, or kidney problems can alter fluid balance. In these cases, it is essential to follow the healthcare professional's instructions and pay even more attention to hydration.

5. Misconceptions about hydration

Without calling them "myths," these are ideas that often lead us to make poor decisions regarding hydration.

"If I'm not thirsty, I'm well hydrated"

Thirst is useful, but not perfect. It can appear when you are already somewhat dehydrated. In older people, the sensation of thirst is often less reliable. Therefore, it's good to consider the context (heat, training, travel, fever, airplane) and the color of your urine, not just "what you feel like."

"The more water I drink, the better"

Drinking water is basic, but it's not about overhydrating. Drinking too much water without replenishing electrolytes can dilute sodium in the blood and be a problem, especially during long efforts. The key is not to drink without limit, but to hydrate intelligently: water + electrolytes in proportion.

"Coffee always dehydrates you"

In moderate amounts, coffee and tea also count as part of your fluid intake. The problem arises when they replace water all day long, or when they become your only strategy to "get energy" instead of maintaining good hydration.

"Hydration only matters when you exercise"

It also matters during long office days, on days with many meetings, when traveling (especially by plane), or when you're recovering from an illness. It's not just an issue for athletes: it's an issue of health, focus, and daily performance.

6. Key facts about dehydration worth remembering

• Hydration is personal. Age, size, activity, climate, altitude, medication, and diet change what you need. There's no magic number that applies to everyone.
• Losing 1–2% of fluid is already noticeable. This level of mild dehydration affects physical and cognitive performance, mood, and the sensation of effort.
• You don't just lose water. With sweat, urine, and certain illnesses, electrolytes are also lost, especially sodium, as well as potassium and magnesium.
• Children and the elderly are more vulnerable. Little ones depend on an adult to offer them fluids; older people often have a reduced sensation of thirst and, often, medications that affect fluids.

7. The role of electrolytes and where LIT comes in

When we talk about intelligent hydration, it's not just the water that matters, but what you take with it. This is where electrolytes come in.

Key electrolytes in hydration are:

• Sodium: helps water absorb well in the intestine and stay in the bloodstream.
• Potassium: regulates fluid inside cells and aids in muscle contraction.
• Magnesium: participates in hundreds of body reactions, many related to energy and neuromuscular function.

When you sweat or lose fluids, you don't just lose water; you primarily lose sodium, and also potassium and magnesium. If you only replenish with water, you dilute sodium in your blood and may continue to feel tired, have a headache, or feel "off."

What LIT brings to your daily hydration

LIT is formulated with essential electrolytes in doses designed for daily use:

• 500 mg of sodium.
• 150 mg of potassium.
• 60 mg of magnesium.
• Lemon, stevia, and citric acid.

And nothing else:

• Sugar-free, dye-free, and filler-free.
• Vegan, gluten-free, and suitable for fasting, keto, and paleo diets.
• Made in Spain.

The goal isn't for you to drink "more for the sake of drinking," but for the water you already consume to work for you: better performance, better focus, and better recovery, with a sugar-free electrolyte drink that fits your lifestyle.

If you want to delve deeper into the formula, you can see all the product details here: LIT sugar-free electrolytes.

8. A smart hydration routine for your daily life

You don't need a spreadsheet to hydrate better. Start with a simple routine that fits your life in Spain, whether you train often or spend many hours in the office.

In the morning

• A glass of water when you wake up to "wake up" your body.
• If you've slept poorly, it's hot, you're training soon, or you're traveling: prepare a bottle with water and a sachet of LIT.

During the day

• Always keep a bottle in sight (on your desk, in your backpack, in the car). What you don't see, doesn't exist.
• Apply a simple rule: every time you finish a meeting or switch tasks → 2-3 sips.

Workouts and very intense days

• If you exercise for more than 45–60 minutes or train in the heat, use water + LIT before, during, or after, depending on what feels best for you.
• Sip, without waiting until you're intensely thirsty. You don't need to "fill up," just maintain balance.

Airplane travel

• Bring your reusable bottle and fill it after security control.
• Set small "anchors": every time the cart passes, every movie, or approximately every hour of the flight, take a few sips.
• On long flights, a sachet of LIT can help you compensate for low cabin humidity and extra fatigue upon arrival.

Evening-night

• If you drink alcohol, alternate each drink with water (with or without electrolytes, depending on how demanding your day has been).
• If you've had a very LIT day—little sleep, workout, rush, travel, a thousand things—a glass with LIT at the end of the day can make a difference in how you wake up the next day.

Ultimately, many of your daily slumps aren't a lack of willpower; they're a sign that your body needs better hydration. Taking care of your hydration with water and electrolytes is a simple way to take care of your energy, your performance, and your well-being.

Frequently asked questions about dehydration and hydration with LIT

How do I know if I'm dehydrated without waiting to be very thirsty?

Beyond thirst, pay attention to the color of your urine (it should be light yellow), your energy level, and symptoms like a mild headache, lack of concentration, or heavy legs. If this happens often, you may need to improve your daily hydration.

Is tap water enough to keep me well hydrated?

Water is the basis of good hydration, but in situations like workouts, heat, airplane travel, or very long days, it may not be enough on its own. That's where water + electrolytes make a difference in maintaining your performance and recovery.

Can I take LIT if I don't do intense sports?

Yes. LIT is designed for all types of active people: from those who train hard to those who have long days of work, travel, family, and errands. It's a simple way to improve your hydration, especially if you live in hot cities or with a fast pace in Spain.

Does LIT contain sugar or "hidden" calories?

No. LIT is a sugar-free electrolyte hydration supplement, with no dyes and no fillers. It is suitable for fasting, keto, paleo, and for people who are very careful about what they consume in their daily lives.