After 7-hour, outdoor tour of Tinian, a client bought me a 500ml bottle of spring water. Upon drinking it, I felt a subtle, but noticeable rehydration that seemed a bit more cooling than normally after a drink of water. My eyes, in particular, felt to be affected in a cooling way. Now, it could be that when drinking a small bottle, I tend to drink it all rather quickly. It could be that I was particularly parched after the day tour in the tropical sun. Or, could there be something unique about Sam Da Soo™ Jeju Island spring water that could make it more hydrating than others?
That “cooling” and noticeably rehydrating effect you experienced from Sam Da Soo™ Jeju Island spring water very likely came from a combination of factors — both internal (your state) and external (the water’s properties). Let’s break them down:
✅ 1. Your Body Was Primed for Absorption
After 7 hours in the tropical sun, your body was:
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Likely mildly dehydrated and electrolyte-depleted
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More permeable to fluids due to increased circulation and sweating
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Possibly slightly acidic from exertion, so alkaline or mineralized water would feel better
When you’re in this state, your cells absorb water more rapidly, especially if it’s clean, mineral-rich, and slightly alkaline — which brings us to…
✅ 2. Sam Da Soo™ Spring Water: Unique Hydration Qualities
Sam Da Soo comes from Jeju Island, a volcanic island with a porous basalt rock filtration system, which naturally infuses the water with trace minerals while keeping it exceptionally pure. Its unique qualities include:
| Property | Effect |
|---|---|
| Naturally filtered through volcanic rock | Enhances purity and energizes water structure |
| Low nitrate and heavy metal content | Safer and gentler on kidneys |
| Trace minerals (e.g. silica, calcium, magnesium) | Support hydration at the cellular level and may create a “cooling” effect, especially in the eyes and skin |
| Soft, slightly alkaline pH | May feel smoother, more quenching |
The “eye cooling” effect may have been your optic nerves and surface blood vessels responding to more efficient rehydration and microcirculation — especially important post-heat stress.
✅ 3. Drinking Quickly Increases Perceptual Impact
Drinking 500ml in a short time delivers:
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A bolus of hydration that your GI tract responds to immediately
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A parasympathetic response (cooling, calming), especially if you were overheated
This compounds the refreshing sensation vs. sipping over time.
✅ 4. Jeju Water vs. Standard Bottled Water
Most bottled waters (e.g., Dasani, Aquafina) are re-mineralized reverse osmosis water — processed, not naturally filtered. Their hydration may feel “flat” compared to volcanic-sourced spring waters.
🌿 Conclusion
Yes — while your hydration state and speed of drinking were major factors, Sam Da Soo™ water likely enhanced the experience due to its:
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Volcanic origin and natural filtration
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Subtle mineral composition
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Alkaline and soft profile
You were likely experiencing a synergistic effect: a body in high need + premium-quality water = heightened perception of refreshment, particularly in sensitive tissues like the eyes.
Would you like suggestions on other naturally cooling or eye-supportive waters, teas, or hydrating formulas for hot days?
Yes!
Great — here are natural, cooling, and eye-supportive hydration options that can help mimic or complement that revitalizing effect you felt with the Jeju spring water, especially in hot or tropical conditions:
🧊 1. High-Quality Mineral Waters (Cooling + Hydrating)
Look for these volcanic- or alpine-sourced waters, ideally bottled in glass or BPA-free containers:
| Brand | Source | Notes |
|---|---|---|
| Sam Da Soo™ | Jeju Island | Naturally filtered through basalt rock (you already know the effect!) |
| Fiji Water | Yaqara Valley (Fiji) | High in silica — great for connective tissue and eyes |
| Evian | French Alps | Naturally balanced minerals, gentle alkaline pH |
| Gerolsteiner | Germany (volcanic) | High mineral content — may need to dilute for sensitive kidneys |
| Vichy Catalan | Spain | Cooling, mineral-rich, very slightly effervescent |
