When you think about skincare, what do you picture?
A serum. A moisturiser. Maybe sunscreen.
But your skincare routine actually started long before you opened the bathroom cabinet.
It started at breakfast.
Your skin is a living organ, constantly being renewed from underneath. The cells that eventually arrive at the surface of your skin have been built, fed and influenced over the preceding weeks and months.
Which raises a rather wonderful question:
Is some of the lunch you ate weeks ago now part of your face?
In a biological sense — yes.
The proteins, fats, vitamins, minerals and other molecules available to your body help provide the raw materials and environment from which your tissues are maintained and renewed.
So skincare isn't simply something you put on your skin.
It is also something you build into your skin.
Skin is an inside-and-outside job
Your skin sits at an extraordinary intersection between your internal biology and the outside world.
From within, it is influenced by nutrition, hormones, immune signalling, circulation and the gut microbiome.
From outside, it is continually negotiating sunlight, temperature, humidity, pollution, washing, friction and the billions of microorganisms that live naturally across its surface.
That is why we think about skin health as a system rather than simply a surface.
You can support the biology underneath while also protecting and hydrating the barrier on top.
And increasingly, research is revealing another fascinating connection between the two:
the gut–skin axis.
What does your gut have to do with your skin?
Your gut contains an enormous microbial ecosystem involved in digestion, metabolism and communication with the immune system.
Diet — particularly the diversity of plant fibres and complex carbohydrates reaching the colon — can influence that ecosystem.
And although gut and skin are obviously very different organs, they are connected through metabolism, immune signalling and inflammation.
This is one reason researchers are increasingly interested in whether supporting a diverse gut microbiome may also influence skin health.
At PhycoHealth, this is particularly interesting to us because seaweed contains unusual fibres and glycans that terrestrial plants simply don't make.
Our SeaFibre range grew from decades of research into these marine molecules.
Human studies using our seaweed fibre have shown changes in gut microbial diversity and inflammatory markers — and our research is continuing to explore how these changes may connect with skin.
So when we talk about feeding your skin from within, we don't mean that eating one particular ingredient magically gives you beautiful skin.
Biology is much more interesting than that.
We mean supporting the biological systems from which healthy tissue is ultimately built.
Meanwhile, there is another ecosystem living on your face
Your skin has its own microbiome.
Bacteria, fungi and other microorganisms live across its surface as part of a complex ecological community.
Far from being something that simply needs to be scrubbed away, this microbial ecosystem forms part of normal healthy skin biology.
Which changes the way we think about skincare.
The goal shouldn't necessarily be to sterilise the skin.
It should be to support a healthy skin environment.
That means maintaining hydration, supporting the skin barrier and avoiding unnecessary disruption to the ecosystem living there.
And this is where our seaweed science becomes particularly interesting.
Meet Phyaluronic®
For decades, hyaluronic acid has become almost synonymous with skin hydration.
But seaweeds evolved their own remarkable water-binding molecules.
Our research led us to one of them.
Phyaluronic® is our name for SXRG84 — a sulfated xylorhamnoglucuronan extracted from our cultivated Ulva seaweed.
Yes, the scientific name is a mouthful.
But the chemistry is fascinating.
SXRG84 is a large, highly water-loving marine glycan. In our laboratory testing it has demonstrated approximately twice the water-holding capacity of hyaluronic acid under the same test conditions.
It also behaves differently.
Our research has investigated its resistance to enzymatic degradation and its interactions with biological processes associated with inflammation, extracellular matrix turnover and tissue repair.
That means we don't think of Phyaluronic simply as “another moisturising ingredient”.
We think of it as a marine biological matrix.
Applied to the skin, it forms a highly hydrated layer that helps create the moist, comfortable environment that healthy skin prefers.
Why hydration matters so much
Hydration can sometimes sound like the boring end of skincare.
It isn't.
Water affects the physical properties of the outer skin layer — its flexibility, softness, smoothness and barrier function.
When skin becomes dry, that outer structure becomes less flexible and microscopic disruption becomes more likely.
Good skincare therefore doesn't need to wage war on your skin.
Sometimes its most useful job is much simpler:
help the skin maintain the environment in which it functions best.
That is why our topical philosophy combines marine glycans such as Phyaluronic with carefully formulated oils, humectants and barrier-supporting ingredients.
Not to replace your skin.
To support it.
One molecule. Two biological worlds.
There is another part of this story we particularly love.
The marine glycans we study can be explored from two completely different directions.
Inside the body, seaweed fibres interact with the gut and its microbial ecosystem.
Outside the body, related marine glycans can help create hydrated biological matrices on the skin.
That gives us what we think of as an inside–outside approach to skin health.
SeaFibre supports the nutritional and microbial environment within.
Phyaluronic skincare supports hydration and the external skin environment. And between them sits the human body — continually renewing itself.
You are building tomorrow's skin today
Perhaps this is the most interesting idea of all.
The skin you see in the mirror today isn't something your body made this morning.
It is the result of biology unfolding over time.
- What you eat.
- How you sleep.
- Sun exposure.
- Hormones.
- Stress.
- Age.
- Your microbiome.
- Your environment.
And yes — what you put on your skin.
None of these things operates alone.
Which is why we don't think skincare should start with the question:
“What can I put on my face?”
A better question might be:
“What environment am I creating for my skin — inside and out?”
Because your skincare routine started before you opened the bathroom cabinet.
It started at breakfast.