restore
Isotonic
9 g/LMatched to body-fluid concentration
Daily mineral replenishment for everyday hydration
Up to 78 minerals and trace elements
Zero sugar, additives or sweeteners
Tested for heavy metals & microplastics
Ready-to-drink liquid format
01
Choose your formula
Recommended
02
Choose your delivery
03
Choose your supply
Best Value
· Save
36%
Ingredients
Purified Atlantic seawater. Nothing else.
- Hypertonic100% seawater, cold-microfiltered
- IsotonicSeawater + spring water, 9 g/L
- No additives
- No stabilisers
- No sweeteners
- No preservatives
Composition
Up to 78 ionic minerals, already dissolved — nothing to break down.
Per Hypertonic sachet
- Chloride198 mg
- Sodium102 mg
- Magnesium11 mg
- Calcium4.8 mg
- Potassium4.8 mg
+ 60 trace elements, including zinc, selenium, iodine and boron. Isotonic: same spectrum, lower concentration.
Directions
1–6 sachets a day. Tear open and drink — no mixing.
- Hypertonic · demandMorning, focus, before or during training
- Isotonic · recoveryAfter training, evening, any time
Tip: Hypertonic earlier in the day, Isotonic later.
Our Process
- Locating the sourceOffshore zones where currents concentrate minerals
- Extracting at depth30–50 m below the surface
- Testing every batch100 control parameters, independent lab verification
- Cold microfiltrationNo heat — minerals stay intact
- Pharmaceutical-grade sachetsSealed from oxygen and light
What’s not inside
- No sugarNo glucose spike, no empty calories
- No sweetenersNone needed, no gut discomfort
- No flavoursNothing undisclosed
- No additivesNo anti-caking agents or carriers
Read our reviews
Rated 4.3 on Trustpilot
Verified
Tear. Drink. Anywhere.
the seaonic system
One source.
Two concentrations.
The same Atlantic seawater. Two natural concentrations.
Designed for different moments.
activate
Hypertonic
33 g/LHigher mineral concentration
A higher concentration for
higher-demand moments.
Trusted voices
Trusted by those who look closer
People who care how minerals are sourced, preserved and tested
-
Alex Bolivar
Holistic Health
“The ocean has always been part of how I move, heal, and live. That’s why I love Seaonic. It gives me ocean-sourced minerals that support how I train, recover, and feel, without all the extra stuff.”
-
Kristina “Miss Meat”
Carnivore
“One ingredient, nothing added, and finally something that actually keeps me hydrated on a carnivore diet.”
-
Morgan Stup
Non-Toxic Living
“Holistic health starts with cellular hydration, and I love that Seaonic checks that box for me!”
How to use Seaonic
Built for different moments.
Choose the routine that matches your day
Daily Foundation
Your everyday foundation
Isotonic seawater minerals for simple, everyday replenishment — helping support hydration and mineral balance throughout the day.
Active
Your daily balance
For active days when you want concentrated mineral support earlier and everyday replenishment later.
High Output
Your high
output routine
For demanding days when your body needs concentrated mineral support throughout — before, during and after.
Purity isn't a claim.
It's proof.
From ocean source to sealed sachet, every stage is controlled to remove unwanted particles, ensure safety and protect product integrity.
01 · filter
Cold Microfiltration
0.22 μm filtration removes unwanted particles without heat or chemicals.
02 · test
Purity Testing
Screened for heavy metals, microplastics and other contaminants.
03 · protect
Pharma-Grade Sachets
Individually sealed to protect
product integrity.
04 · verify
Batch Analysis
Certificate of Analysis available for every batch.
Seaonic in the wild
Real routines.
Real difference.
See how Seaonic fits into real days,
real training and real routines.
Hydration
“Carnivore means no junk, no powders, no flavourings. This is the only electrolyte that fits.”
brandon
verified customer
Recovery
Nothing to forgive.
“I'm carnivore, so most electrolytes were off the table — citric acid, stevia, flavors. Seaonic is just seawater. It's the only one that never broke my protocol."
Energy
“No cramps, no crash. Just steady energy from start to finish.”
noah
verified customer
The Seaonic difference
How Seaonic compares
One natural source. Nothing added.
Typical
powders
powders
Typical drops
& concentrates
& concentrates
Broad mineral spectrum
yes
no
some
Ionic, in solution
yes
no
yes
Natural proportions
yes
no
no
Cold microfiltered
yes
no
no
No additives
yes
no
no
Third-party tested
yes
no
no
Defined tonicity
yes
no
no
Yes
Some products
No
Community
Back to the source
Seaonic lives where the day is hard — gym floors, fasting windows, open water. Join the people drinking the ocean daily.
-
Mid-session
Straight, no mixing -
Post-Session
Straight after training -
On the go
Right where you need it -
In the gym
Before the session
FAQ
Everything else you'd ask
What exactly is Seaonic?
One ingredient: cold-microfiltered Atlantic seawater from phytoplankton vortexes in the Bay of Biscay, off the coast of France and Spain. It's purified and packaged, nothing added — a concentrated liquid that naturally contains up to 78 ionic minerals and trace elements.
How is Seaonic different from other electrolytes?
Most electrolytes are a formulation — 8–12 isolated ingredients assembled to deliver just 3–4 minerals, often with sweeteners, flavours and fillers. Seaonic is one ingredient that's naturally rich in the full spectrum: up to 78 minerals and trace elements, nothing added. It's the difference between a fresh orange — one ingredient, naturally full of vitamins, minerals and nutrients — and boxed orange juice, a formulation of isolated ingredients with hardly any nutrition. Nobody built the orange; nature did.
Is seawater safe to drink?
Raw ocean water isn't — which is exactly the problem Seaonic set out to solve. It goes through multi-stage cold microfiltration in a European pharmaceutical-grade lab to remove contaminants, and every batch is third-party tested for heavy metals, microplastics and microbial safety before it's released. It's produced to food-grade standards under GMP and ISO certification.
How is Seaonic filtered and tested?
Multi-stage cold microfiltration — no heat, no chemicals — all in one lab in Spain, with over 100 control parameters across the process. Every batch is third-party tested for microbes, chemical composition, heavy metals (lead, cadmium, mercury, arsenic) and microplastics, plus a full nutrient analysis to verify the mineral profile. COAs are available on request.
What is the difference between Isotonic and Hypertonic?
Both are the same seawater at different concentrations. Hypertonic (33 g/L) is natural seawater salinity, more concentrated than blood plasma. Isotonic (9 g/L) is diluted with spring water to match the mineral concentration of your blood plasma. Think of it like a bath versus an ice bath: a bath at body temperature helps bring you back to baseline, while an ice bath deliberately takes you outside your baseline to trigger a desired response. Same water — both have their place.
Which Seaonic concentration should I choose?
Hypertonic is the activating one — mornings, fasting, exercise. Isotonic is the gentle one — recovery, sleep, daily hydration. Many people use both at opposite ends of the day.
Does Seaonic contain sugar, flavours or sweeteners?
No. Zero carbs, zero sugar, zero sweeteners, zero flavours, zero additives. One ingredient — it breaks no protocol, whether that's carnivore, keto, fasting or paleo.
How do I take Seaonic?
Tear. Drink. Take it neat, straight from the sachet. Don't mix it with water — it's a concentrated liquid, not a powder you dissolve.