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Deep hydration
Isotonic absorption delivers water and minerals directly to your cells — no waiting, no waste.
Mediterranean origin · Naturally isotonic
This is hydration.
A premium hydration beverage drawn from naturally isotonic Mediterranean seawater. 78 trace minerals. Zero sugar. The original electrolyte.
78 trace mineralsNaturally isotonicZero sugarZero additivesCold micro-filteredMediterranean source
What is Hydrosea
Seawater, returned to the body in its natural ratio.
Hydrosea is a hydration beverage made from cold-current Mediterranean seawater, gently rebalanced with pure spring water to reach an isotonic state — the same mineral concentration as human blood plasma.
No sugar. No flavoring. No synthetic electrolytes. Only what the ocean already holds: sodium, magnesium, potassium, calcium and 74 other trace minerals, in the exact ratio your cells recognize.
Benefits
Hydration is not water alone.
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Natural electrolytes
Sodium, potassium, magnesium and calcium in their original marine ratio. No synthetic salts.
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78 trace minerals
Zinc, iodine, selenium, lithium and more — the elements modern diets quietly lack.
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Recovery
Replenish what training, heat or long days deplete, without sugar or stimulants.
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Daily balance
A measured mineral intake that supports nerves, muscles and cognitive clarity.
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Pure & clean
Zero calories, zero sugar, zero additives. Only seawater and spring water.
The science
Why the ocean is the original isotonic solution.
In 1897, French physiologist René Quinton demonstrated that seawater, properly diluted, shares the exact mineral composition of human extracellular fluid. More than a century of research has confirmed it: the ocean and the body speak the same chemistry.
- 9 g/L
- Isotonic concentration matching blood plasma
- 78
- Trace minerals naturally present per bottle
- 0 g
- Sugar, sweeteners or additives
- 1897
- First scientific demonstration of isotonicity
Why Hydrosea is different
Not a sports drink. A return to source.
Source
Hydrosea
Mediterranean seawater
Sports drinks
Tap water + synthetics
Electrolytes
Hydrosea
Naturally present, 78 minerals
Sports drinks
2–3 added salts
Sugar
Hydrosea
0 g
Sports drinks
20–40 g per serving
Additives
Hydrosea
None
Sports drinks
Colorants, flavoring, preservatives
Absorption
Hydrosea
Isotonic, immediate
Sports drinks
Hypertonic, delayed
Calories
Hydrosea
0
Sports drinks
80–150 kcal
The Hydrosea collection
Two ways into the ritual.
Naturally isotonic seawater, drawn from the Mediterranean. No sugar. No additives. Recognised hydration.
Starter
Starter Pack
15 bottles · 250 ml
A two-week introduction to the ritual. Discover hydration the body recognises.
€37,50
€2,50 / bottle
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Monthly Pack
30 bottles · 250 ml
One bottle a day. A full month of ocean mineral balance.
€69
€2,30 / bottle
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Compare the packs
Bottles
Starter
15
Monthly
30
Format
Starter
250 ml PET
Monthly
250 ml PET
Per bottle
Starter
€2,50
Monthly
€2,30
Designed for
Starter
Discovery
Monthly
Daily ritual
Shipping
Starter
Free over €40
Monthly
Always free
What is inside, and what is not.
Naturally isotonic
The same mineral concentration as your blood plasma.
Ocean minerals
78 trace minerals in their original marine ratio.
Electrolyte balance
Sodium, potassium, magnesium, calcium — as the body expects them.
No sugar
Zero grams. Zero sweeteners.
No additives
No colorants, no flavoring, no preservatives.
Recognised hydration
Absorbed by the cells without conversion.
Origin
Cold-current Mediterranean source, micro-filtered.
Science
Grounded in over a century of marine physiology.
Hydrosea
from €37,50
The daily ritual
One bottle a day. A quiet act of care.
Hydration is not a sprint. It is a rhythm. Hydrosea is built around a single, deliberate gesture each morning — the way the body was designed to receive water: slowly, fully, with minerals intact.
Morning
Wake. One bottle. The day begins remineralized.
Movement
Replace what effort takes — without sugar.
Evening
Restore balance before rest.
Questions
Everything worth knowing.
Clear answers about isotonic seawater, electrolytes and the science behind natural hydration.
Full FAQ →- Isotonic seawater is seawater that has been purified and balanced so its mineral concentration matches the osmotic pressure of human blood plasma — roughly 9 grams of dissolved minerals per liter. In this state the body absorbs it effortlessly, without disrupting cellular balance.
Drink the ocean. Become the tide.
The hydration ritual chosen by those who measure quality in milligrams, not in marketing.
Begin the ritual