LA BIOSTHÉTIQUE: MY LONG-TERM RELATIONSHIP WITH LONG HAIR September 20, 2026Beauty, Healthy HairOff
LA BIOSTHÉTIQUE LONG HAIR: THE LONG GAME
La Biosthétique takes hair longevity seriously. As someone with very long, fine and naturally dry hair – and a rather unreasonable attachment to keeping it that way – so do I.
by Shari Inessa
Journalist & Editor-in-Chief, WHAT WE ADORE Magazine
I have very long hair and it tends to be dry. Sun, sea, swimming pools, heat, planes, all very good for the soul, slightly less convincing for the last twenty centimetres of your hair. I have used La Biosthétique for years, long before “longevity” became the word appearing on everything from supplements to face creams. And for my hair, it has consistently been one of the brands I trust most.
So their new Long Hair approach, built around what the brand calls Hair Longevity, makes complete sense to me. The philosophy is refreshingly simple: if you want very long hair, you cannot only repair the ends once they are damaged. You have to look after the entire ecosystem – scalp, roots, lengths and ends – continuously.
And this is precisely how I have learned to treat mine.
THE LONG HAIR LINE-UP
Protective Volumising Shampoo & Protective Softening Shampoo
Two shampoos tailored to the different needs of long hair – whether fine or dry – cleansing gently while helping to strengthen the hair fibre. €32 each
Protective Repair Mask
An intensive treatment for stressed lengths, designed to deeply nourish, strengthen the hair structure and help protect against breakage. €42
Protective Conditioning Fluid
A leave-in treatment that hydrates the lengths while providing heat protection up to 230°C. €33.50
Growth Booster
A targeted scalp treatment designed to stimulate the roots, strengthen their anchoring and support healthy hair growth. €72
Silky Detangling Spray
A leave-in spray that instantly detangles, helps control frizz and protects long hair against friction and breakage. €30.50
Refreshing Dry Shampoo
A dry shampoo designed to refresh the roots between washes while restoring volume and texture – particularly useful when washing very long hair feels like an event in itself. €33
Weightless Conditioning Oil
A lightweight oil that nourishes dry lengths and ends, leaving hair softer and shinier without weighing it down – especially important for fine hair like mine. €49
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IT ACTUALLY STARTS WITH THE SCALP
German practicality perhaps, but I have never really believed in miracles in a bottle. Beautiful long hair is mostly about consistency.
I use a lot of scalp products because, ultimately, this is where everything begins. You can put the most luxurious oil in the world on your ends, but if you want hair to continue growing beautifully, taking care of the scalp and roots is just as important.
La Biosthétique’s new Long Hair collection approaches hair in exactly this way. Its eight products are designed as a complete system, with formulas for the scalp and roots as well as the lengths and ends. At the centre of the collection is an innovative active derived from wild olive stem cells, combined with biotechnology designed to strengthen and protect the hair structure. The formulas address the things that become increasingly important the longer your hair gets: hydration, elasticity, breakage, split ends, heat protection and environmental stress. There is even a Growth Booster specifically created for the scalp and roots – naturally, the product that immediately got my attention.
FINE HAIR HAS RULES
My problem with many products for dry hair is that they solve one problem and create another. Yes, the hair feels nourished. It also suddenly weighs approximately three kilograms and has lost any suggestion of movement. Fine, long hair needs moisture and nourishment without being overloaded, which is one of the reasons I have stayed loyal to La Biosthétique. When the balance is right, my hair remains soft, shiny and – very importantly – easy to handle.
The Long Hair collection includes everything from the Protective Volumising Shampoo and Protective Softening Shampoo to the Protective Repair Mask, Protective Conditioning Fluid, Weightless Conditioning Oil and Silky Detangling Spray. The latter may sound like a small luxury until you have very long, fine hair after washing it.
Then it becomes crisis management.
THE POST-SUMMER RESCUE
For me, the real test of haircare is September.
After weeks of sun, salt water and heat, my lengths are always noticeably drier. This is when I become much more disciplined about masks, conditioning treatments, oils and scalp care. The Protective Repair Mask is designed for exactly those compromised lengths, while the Protective Conditioning Fluid protects against styling heat up to 230°C. The Weightless Conditioning Oil, with argan and meadowfoam oils, is particularly interesting for fine hair because it is designed to nourish and smooth without sacrificing lightness.
And then there is the science. La Biosthétique reports up to 75% fewer split ends, increased hair resistance and improved hydration with the technology behind the collection. There is also protection against environmental stress and the daily mechanical damage we rarely think about – brushing, styling and even friction while sleeping. For someone trying to maintain genuinely long hair, those details matter. Growing hair is one thing. Keeping the hair you have already grown beautiful is the difficult part.
WHY I KEEP COMING BACK
There are always new beauty launches on my desk. It is one of the lovely occupational hazards of being a journalist.
But there is a difference between testing a product because it is new and buying or using a brand again because you know what it does to your hair.
La Biosthétique belongs to the second category for me.
I have used their products for years because they work particularly well with what my hair needs: care at the scalp, nourishment through the lengths, shine without heaviness and products that make very long, fine hair much easier to manage. The new Long Hair collection simply takes that philosophy further, combining up to 98% ingredients of natural origin in the range with a much more technological approach to strengthening and protecting the hair.
And it smells beautiful, which is not entirely irrelevant. The Long Hair fragrance was created by perfumer Geza Schön, with bergamot, blackcurrant and mandarin followed by magnolia, jasmine and heliotrope, then musk, sandalwood and cinnamon.
Science is important. But if I am going to have my hair around my face all day, I would also quite like it to smell wonderful.
After years of trying products – and years of refusing to cut my hair simply because summer happened to it – I have learned one thing: very long hair is not really about growing it. It is about keeping it. And that is where La Biosthétique remains, for me, one of the best.
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Shari Inessa
Journalist & Editor-in-Chief, WHAT WE ADORE Magazine
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LA BIOSTHÉTIQUE PARIS
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Tags: beauty editor, beauty routine, damaged hair, dry hair, fine hair, french beauty, Growth Booster, hair growth, hair growth products, Hair Longevity, hair longevity routine, hair mask, hair oil, hair repair, haircare routine, Healthy Hair, healthy long hair, La Biosthetique, La Biosthétique Long Hair, La Biosthétique Paris, Long Hair, long hair care, luxury haircare, Paris Beauty, post summer hair, Protective Conditioning Fluid, Protective Repair Mask, scalp care, scalp health, Shari Inessa, shiny hair, Silky Detangling Spray, split ends, summer hair damage, very long hair, Weightless Conditioning Oil, What We Adore, What We Adore Magazine
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