Marine Bamboo vs Sea Keratin: Which Scalp&Care Range Is Right for You?
Same brand, two formulations — here's how to pick.
Scalp&Care is built around one belief: a healthy scalp is where fuller, thicker, stronger hair starts. The active blend that delivers it — Hairdian™ — sits inside every product across the 6-product range. But the supporting ingredients aren't identical, because natural hair and coloured hair don't behave the same way.
That's why the range splits into two formulations. The Natural Hair range is anchored by Marine Bamboo. The Coloured Hair range is anchored by Sea Keratin. Both share the same active core. What changes is the surrounding chemistry — built around what your hair actually needs.
Here's how to know which one is for you.
What Marine Bamboo does
Marine Bamboo is the common name for Himanthalia Elongata, a long, ribbon-shaped sea algae harvested off Atlantic coastlines. Despite the name, it isn't bamboo — it's a brown seaweed, rich in minerals, silica, and amino acids that suit hair in its untreated state.
In the Natural Hair range, Marine Bamboo plays two roles. It helps strengthen the hair shaft from root to tip, supporting the elasticity that makes healthy hair feel bouncy rather than brittle. And it nourishes the scalp with marine-sourced minerals — the same family of trace elements your follicles draw on to produce strong, structured strands.
Natural hair has its full cuticle layer intact. It doesn't need rebuilding — it needs feeding, balancing, and protecting from the daily wear of brushing, heat, and weather. Marine Bamboo is built for exactly that. It supports strength without stiffness, and works with the hair's own structure rather than coating over it.
If your hair has never been coloured, bleached, permed, or chemically straightened, this is your range.
What Sea Keratin does
Sea Keratin is a marine-derived protein modelled on the keratin your hair is naturally built from. Sourced from sustainable marine ingredients and processed into a form small enough to bond with the hair structure where colour processing has weakened it.
Colouring, bleaching, and chemical straightening all lift the cuticle and break protein bonds inside the cortex of the hair. That's what gives coloured hair its characteristic porous, sometimes hollow feel — and what makes it more vulnerable to breakage, dullness, and fade.
Sea Keratin helps repair this by filling in those weakened areas, supporting strand integrity, and helping the cuticle lie flatter so colour stays vibrant for longer. The Coloured Hair range pairs Sea Keratin with colour-safe surfactants — meaning the formula cleans gently without stripping the pigment your colourist worked hard to deposit.
If your hair is coloured, highlighted, toned, permed, or chemically straightened, this is your range.
How to know which range is right for you
Most people fall into one of five situations:
- Natural, untreated hair — no colour, no chemical work. → Marine Bamboo (Natural Hair range).
- Coloured or highlighted hair — any salon or box colour, regardless of how recent. → Sea Keratin (Coloured Hair range).
- Chemically treated — perms, relaxers, keratin smoothing, or chemical straightening. → Sea Keratin (Coloured Hair range) — the repair-focused formulation is the better match.
- Mixed history — roots growing out natural, lengths still coloured. → Sea Keratin until you've cut off all treated length, then switch.
- Transitioning out of colour — growing it out and supporting both new natural growth and older coloured length. → Sea Keratin while coloured length remains.
Quick rule: if you're not sure, pick Sea Keratin. The Coloured Hair formulation is gentle enough for compromised strands and won't harm natural hair. The Natural Hair formulation isn't built to repair colour damage.
The shared core — Hairdian™, Biotin, Hyaluronic Acid
The signature ingredients differ. The active core doesn't.
Every product in both ranges contains the same three foundation actives:
- Hairdian™ — the 4-plant active blend (ginger root, thuja, red clover, Artemisia argyi). Supports follicle health and helps create the conditions for a healthy anagen phase. The full breakdown is in our Hairdian™ ingredient guide.
- Biotin — a B-vitamin involved in the production of keratin, the structural protein your hair is made from. Helps support strand strength from the inside.
- Hyaluronic Acid — best known in skincare for its moisture-binding properties, it does the same job on the scalp: helping to moisturise and keep the follicle environment hydrated and comfortable.
This shared core is why both ranges work toward the same outcome. They just take a slightly different route to get there, based on what your hair starts with.
How to build your routine across the 6-product range
The 4-step daily routine works the same way in either range:
- Shampoo — Natural or Coloured, matched to your hair state.
- Conditioner — Natural or Coloured, matched to your hair state.
- Tonic Defence Spray — universal, alcohol-free, applied to the scalp daily.
- Follicle Intensive Treatment — universal serum, applied directly to the scalp morning and night.
Two products change with your range. Two stay the same. That's by design — so the universal treatments deliver Hairdian™ to the scalp regardless of which hair-state range you're using day to day.
If your hair state changes — you decide to colour, or you grow out and cut off colour — only the shampoo and conditioner swap. The rest of your routine stays the same.
Find your range
Pick the one that matches your hair today. Switch if your hair changes tomorrow.
Natural Hair range:
Coloured Hair range:
Built in Australia. Vegan, alcohol-free, sulphate-free, paraben-free. Designed to support "Fuller, Thicker, Stronger Hair" — the same promise, two formulations, one healthy scalp at the centre of it all.