I tried Keune’s new haircare routine that promises fuller, longer hair in 60 days – here’s my verdict

Acclaimed Dutch haircosmetics brand Keune has been at the forefront of pioneering haircare since founders Cornelia and Jan Keune began crafting the company’s exceptional products in 1922. Fast forward over a century, and its cruelty-free, salon-level haircare has become a staple in countless beauty cupboards across the globe, celebrated for its potent performance blending cutting-edge science with superb care and clean formulations (Keune has been B-Corp certified since 2023).

This September marked a significant turning point for Keune as it refreshed its entire haircare line, introducing a next-generation collection that offers personalised routines for all hair and scalp needs and, as the brand puts it, “instant results.” The new Care range boasts 15 routines – including Absolute Volume, Confident Curl, Dandruff Detox and Blonde Saviour – each designed to target specific concerns. The updated offering also features a brand-new product family, the Long and Strong routine, clinically proven to deliver fuller, longer hair in just 60 days.

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“Everything started with the why,” says Ewa Grygorowicz, head of the Keune Laboratory. “The market is so saturated in the beauty industry right now, and our question was: how do we make sure we’re not just adding to the noise? For us, the ‘why’ wasn’t in the formula, the benchmarks, or the trendy ingredients, but in really understanding the problems and challenges our customers want to solve.” By listening to its co-creation partners worldwide, the brand identified the most common hair-related issues and developed science-backed formulas to tackle them. “I think these 15 routines are so well chosen, because everybody probably recognises one of those things,” adds Philip Berlijn, CEO of Keune. “I can honestly say, with hand on my heart, that the products that we make are the best in the market.”

Putting the new Long and Strong routine to the test, I diligently used the products for 60 days to see whether they delivered on their promises. Scroll on for the verdict.

Comprising a comprehensive line-up, the Long & Strong routine includes four core products: the Strengthening Shampoo, the Strengthening Conditioner and two bolstering formulations: the Super Serum and Densifying Leave-In Treatment.

“Long & Strong is powered by a trio of advanced ingredients that bring real science to visibly fuller, stronger hair,” explains Grygorowicz. At the heart of the routine is Marine Density Infusion, which she dubs “a next-generation complex that helps boost strand thickness and reinforce the hair fiber, giving it greater resilience and longevity from root to tip.”

Blended with Biomimetic Peptides – intelligent actives that mimic the body’s own growth signals and target the follicle directly, helping extend the growth phase and reduce shedding over time – and Centella Asiatica, a soothing and regenerative powerhouse, the products pack a growth-stimulating punch, all while deeply nourishing your scalp and strands. The routine is suitable for colour-treated, bleached and heat-stressed locks, as well as for a range of hair types, from fine and coily to curly.

“While many growth-focused routines concentrate solely on the scalp, this system takes a dual-action approach – strengthening the follicle at the root and reinforcing the hair fiber along its entire length,” Grygorowicz continues. “The routine itself was crafted together with professional hair experts, ensuring each step gives hair exactly what it needs, from effective cleansing and strengthening to softness, movement, and light-reflective shine.”

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The Long and Strong routine promises fuller, longer hair in just 60 days – a claim validated by a rigorous, independent in-vivo study. “Volunteers used the Super Serum at least five times a week, without knowing it was a Keune product, and the transformation was unmistakable,” says Grygorowicz. “Using high-precision scalp micro-imaging, experts could clearly see that 94 per cent of participants were losing less hair, with more strands staying in the growth stage for longer.” Meanwhile, a trichogram analysis (a technique that examines tiny hair clusters under a microscope) revealed that 94 per cent had more new hairs growing in. Finally, Grygorowicz notes that instrumental testing in a controlled lab environment showed an immediate increase in shine of up to 76 per cent.

So, how to use the routine correctly to yield the best results at home? It all comes down to consistent, targeted care. Like in the clinical study, the Super Serum, which Grygorowicz crowns the “true hero of the routine”, should be used at least five times a week – yes, on non-wash days as well. “The serum is designed to absorb instantly into clean, damp or even completely dry hair, making it effortless to use any day of the week,” Grygorowicz says. “Applying it between washes keeps the biomimetic peptides continuously active.”

On wash days, start with the Strengthening Shampoo for a deep cleanse of your scalp (it’s recommended to wash twice to purify thoroughly), then follow with the Strengthening Conditioner for luxe nourishment and to fortify fragile fibres. On towel-dried hair, slather on the Densifying Leave-In Treatment for an extra boost of fullness, and finish with the Super Serum. Apply it section by section, gently massaging into the scalp.

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I’ll preface this by saying that I’ve been lucky enough to have long and relatively thick hair for most of my life. However, whether it’s due to stress, the unforgiving Nordic winter or something else, I’ve recently noticed that I’m shedding more hair than usual, and my tresses feel coarse, fragile and generally lacklustre. Once a year, I also enliven my mane with blonde highlights, which undoubtedly adds a bit of damage.

Doing the Long and Strong routine for the first time, I was instantly struck by its heavenly (but not overpowering) scent that lingers in your strands long after use. Then again, that’s hardly surprising, considering that Keune collaborates with the same master perfumers behind some of the most iconic fragrances from major luxury houses like Saint Laurent and Prada.

The “instant” results, including enhanced softness and shine, are definitely noticeable. Post-first-wash and leave-in treatments, my hair felt silkier and more hydrated. Plus, the consistencies of both the Densifying Leave-In Treatment and the Super Serum are ideal, leaving no residue or stickiness. I have to admit, I was hesitant to use the Super Serum on dry hair on non-wash days at first, but the non-greasy, lightweight formula melted away with no trace. I applied it in the evenings, five to six times a week (and washed my hair three times a week).

As for the results after 60 days, with my already long hair, it’s difficult to gauge precisely how much it grew or whether the difference is significant, but it does look and feel much healthier, bouncier and fuller. Its overall appearance is much more vibrant, as seen in the ‘before’ and ‘after’ pictures. My hair doesn’t feel as brittle and fragile as it did before, and I’ve also noticed that the shedding has clearly calmed down, with new little baby hairs sprouting.

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If your hair and scalp are in need of deep nourishment and you’re looking for glossier, healthier tresses with added oomph, this routine is definitely for you. Although 60 days isn’t quite long enough to render Rapunzel-level locks, I do feel my hair’s growth has accelerated. But more importantly, it feels revived and more vigorous. I’m sure more noticeable length changes will follow down the line as I keep using the products.