You can also get dehydrated in winter: less thirst, more cold-induced diuresis, dry air (heating), and "invisible" sweat under layers. At LIT, we state it clearly: electrolytes are not a treatment, but they do help you hydrate better when you train, fly, use a sauna, or spend days with the flu.
Why you also get dehydrated in winter (even if you don't feel hot)
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- Less thirst: cold "switches off" the thirst signal → you drink less even if you continue to lose water.
- Cold diuresis: peripheral vasoconstriction increases central blood volume and the kidneys "read" excess fluid → you urinate more (water + sodium).
- Cold air + heating: dry out mucous membranes and increase losses through breathing and skin (drier lips, nose, and throat).
- Invisible sweat during workouts: with thermal clothing and layers, you still sweat, but the sweat stays in your clothes and you don't see it; you lose sodium, potassium, and some magnesium from your body.
- More respiratory infections: fever, decreased appetite, and, if gastrointestinal issues arise, more fluid and electrolyte losses.
Typical signs of mild dehydration: "delayed" thirst, subtle headache, "unusual" fatigue, cramps, dark urine, dizziness when standing up quickly.
The real role of sodium, potassium, and magnesium
- Sodium: regulates extracellular volume and helps retain the water you drink. Drinking only water on long runs (even in cold weather) can dilute sodium.
- Potassium: key for muscle contraction and heart's electrical function. Lost through sweat; in winter, many diets include less fresh fruit/vegetables.
- Magnesium: involved in energy production (ATP) and muscle relaxation. Low levels are associated with cramps, fatigue, and poorer recovery.
LIT Translation: it won't land you in the hospital, but it can zap your "spark": more fatigue, cramps, slow recovery, and poorer exercise tolerance.
When it does make sense to boost electrolytes in winter
Long workouts (running, trail, cross-country skiing) > 60–90 min
Thermal layers = invisible sweat. Base: water + electrolytes on easy/medium runs; add carbohydrates separately (gels/food) for high intensities.
- Before: 300–500 ml of water; if you usually finish feeling "flat," consider ½–1 sachet in that bottle.
- During (>90’): 500–700 ml with 1 sachet spread out.
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After: 500 ml with ½–1 sachet if you had cramps or a headache.
Sauna (or hot-cold contrasts)
10–20 min sessions cause high sweating.
- Before: 300–500 ml of water.
- Between rounds: sips.
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Post: 300–500 ml with ½–1 sachet if you feel "foggy-headed" or have cramps.
Gym (strength/HIIT) with thermal clothing
Warm room + layers = "invisible" sweat. If you accumulate muscle pulls by the end of the week, try 500 ml with ½ sachet after the session.
Flights and vacations (plane + temperature changes)
Low humidity cabin + hours sitting = respiratory losses and postural diuresis.
- Pre-flight: 300–500 ml of water.
- During: regular sips (avoid arriving "dry" at your destination).
- Post-flight: 500 ml with ½–1 sachet if you have a headache, fatigue, or heavy legs.
- If you are traveling to altitude or starting ski/trail upon arrival, increase electrolytes in the first workout.
Flu days with fever (without persistent vomiting/diarrhea)
It doesn't "cure," it supports: makes it easier to drink and replenishes some sodium, potassium, and magnesium.
- 1–2 times/day, 1 sachet in 500–750 ml + water/infusions/broths.
- If there is persistent vomiting or diarrhea, priority: oral rehydration solution (ORS), not LIT.
Intermittent fasting + morning workout
When fasting and in the cold, headaches/slumps due to low salty intake are more likely. 1 sachet provides ~7.2 kcal: usually fits into "pragmatic" fasting. If you do 0 kcal fasting, respect your protocol.
Offices and homes with powerful heating
Dry air + little water → fatigue, mild cramps, concentrated urine. Add ½ sachet to one of your daily bottles and evaluate how you feel after 24–48 hours.
When it's not necessary and precautions
- If you don't train hard, are healthy, and eat normally, water + diet are usually sufficient; overdoing saline drinks makes no sense.
- If you have hypertension, kidney/heart disease, or take diuretics, consult before daily use of products rich in sodium/potassium.
- Electrolytes do not replace total hydration, a decent diet, or medical treatment.
Where LIT fits in
LIT is a clean mix: 500 mg sodium, 150 mg potassium, 60 mg magnesium, 0 g sugar, no colorants or preservatives, ~7.2 kcal per sachet (500–700 ml). Useful as hydration support for winter workouts, sauna, flights, and mild fever days.
Brief FAQ
Do I also get dehydrated in winter?
Yes, but you notice it less: less thirst, more cold-induced diuresis, and dry air. If you train or fly, add extra losses.
Just water or water + electrolytes?
It depends on the context. For long workouts, sauna, flights, or mild fever, water + electrolytes usually works better than just water.
LIT during intermittent fasting?
One sachet has ~7.2 kcal. It fits into "pragmatic" fasting. If your protocol is 0 kcal, respect it.
