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 • Skincare  • Skincare Reviews  • Why I’ve Rekindled My Love For La Roche Posay Hyalu B5 Serum

Why I’ve Rekindled My Love For La Roche Posay Hyalu B5 Serum

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Main image – @lilith.martirosyan_/Instagram

If there’s one skincare thing I love, it’s a serum. It’s the step usually sandwiched between your cleanser and your moisturiser and reminds me of that sacred ingredient in an actual sandwich that brings the flavours all together. 

Have you seen that hilarious skit in ‘Friends’ about the slice of gravy-soaked bread in the middle of Ross’ turkey sandwich, which he calls ‘the moist maker’? Well, in my twisted mind, a serum is a bit like that.

What I like about serums is that they tend to contain concentrated ingredients to treat and heal the skin, plus they’re fast-drying.

Having recently experienced some hormonal changes, my skin went from dry to oily in one confusing six-month period. Where I was once slathering on oils, thick moisturisers and thirst-quenching serums, I had to start tiptoeing around my greasy skin with lightweight, mattifying, oil-free formulas to help it look less like a chip-pan. 

But there is one product that I stopped using when oily skin came knocking on my door that I have since picked up again. I originally gave it up because I was worried it was giving my skin too much hydration, too much glow (is there ever too much?) and too much grease. 


Beauty editor Philippa Pearne has rekindled her love of La Roche Posay’s cult serum. Image – Courtesy of writer


However, like an ex you can’t quite let go of, I recently gave it another shot and now I can’t believe I ever doubted it. Proof, then, that some products really are suitable for all skin types. Read on to find out more.


The facts

Packed full of plumping, firming, hydrating ingredients, La Roche Posay Hyalu B5 Serum (£45 from La Roche Posay UK /$39.99 from La Roche Posay US) aims to improve elasticity and bounce within hours. The description on the website says, “skin immediately recovers bounce, suppleness and a fresh complexion.”



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PSA. This is exactly what it does for my skin. I don’t think I have ever read a more accurate product description in my 17-year career as a beauty journalist (and I’ve read a few…). 

It carries on, “After 4 hours, elasticity and firmness are improved by 24% and skin is 70% more hydrated. After a month of use, 87% had more elastic and even skin and 71% agreed their wrinkles looked reduced.”


Getting it all wrong

So why did I ever stray?! When my skin first began to change from dry to oily, I naively carried on using La Roche Posay Hyalu B5 Serum in the same way I always did. Straight after a balm or oil cleanser and I didn’t hold back with how much I applied. 

Because of its hyaluronic acid content, and the fact that I was so used to having drier-than-the-desert skin, I wanted to slather that stuff on as if my life depended on it. But it was too much. 

Add to that the fact that I was using a cleanser not particularly suited to oily skin, it meant that by lunchtime my face was one big oil slick with barely any makeup left on it. (Don’t judge, even beauty journalists make mistakes and I have a list as long as my arm…).



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So, I put a stop to it and turned to thinner, lightweight serums that didn’t pack so much of a punch. I also had to take into consideration its price. At £45, the La Roche Posay serum was a lot for me to maintain (especially as I would use so much – oops) and if it was the cause of my oil-slick skin, it wasn’t worth it.

After a few months, still getting to grips with my new oily skin status, I was struggling with both my makeup and skincare. I couldn’t find the right balance of glowy-not-greasy. Nothing lived up to the glow the La Roche Posay serum gave me but I was too scared to overload my face with heavy, hydrating ingredients.

I was wearing the mattest of matte foundations which, combined with my new lightweight (and let’s be honest, not very good) serums was making my skin look flat. There was zero plump, hydration or glow (apart from a lot of over-compensated for oil production) and I had officially gone too far in the other direction. 

It was official. Without wanting to sound like I’m penning The Notebook 2, I missed my La Roche Posay Hyalu B5 Serum. 


Second chances

First, I changed my cleanser to a more oily-skin friendly one. The Caudalie Vinopure Gel Cleanser (£18 from Caudalie UK /$30 from Caudalie US) has been a game-changer for my skin. No more balms or oils, I worked out that this is where I needed to hold back on the hydration.

This cleanser leaves my skin glowy but with absolutely no trace of oil or grease in its wake. It contains salicylic acid too which really helps with my breakouts.



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Then, I bit the bullet. I found my old faithful La Roche Posay Hyalu B5 Serum on sale at Look Fantastic (they always have brilliant deals) and that was it. It was officially back in my life. 

Because despite what you (or past I) might assume, even oily skin types need hydration and I was doing mine a disservice by cutting out a serum that always delivered it.

After using my new cleanser, I now apply less of the La Roche Posay serum than I used to – so, half a pea-sized blob. And I let it sink in properly before applying my favourite lightweight day moisturiser, La Roche Posay Effaclar Duo+ SPF 30 with Niacinamide (£15 from Look Fantastic UK).

Just three simple tweaks and my glow was back. 

  1. Use the right cleanser
  2. Apply the same serum that always worked for me, only less of it.
  3. Wait for it to sink in. 

I can now wear a matte foundation without my skin looking flat and I’ve finally found the right mix of grease-free and glowy. Not a chip pan in sight.

I use it as a night serum too. When I woke up this morning, I almost didn’t want to wash my face because it looked like I had just had a plumping, smoothing, clearing facial

My skin was bouncy, fresh and practically perfect. Bringing truth to the term “I woke up like this.” 

You can see just how quickly it gives you that dewy effect in Instagrammer @juliasauerr’s video below.



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A post shared by Julia? (@juliasauerr)


The takeaway

The moral of my little love story is, everything in moderation. Cutting out what loyally used to work for my skin, despite my skin type changing, ended up working against me. 

La Roche Posay Hyalu B5 Serum, I will never look the other way again. You might be £10 more expensive than what I’d like to be spending on my skincare, but giving facial-worthy, confidence boosting skin, makes you worth every penny.


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Beauty Editor

The former Beauty Editor of Glamour UK, Philippa has been a beauty and lifestyle journalist for over 16 years, picking up countless tips and tricks from makeup artists, hair stylists, dermatologists and celebrities. In that time she’s written for names like Cosmopolitan, The Sunday Times Style, The Telegraph, Grazia, Refinery 29 and Byrdie. Philippa lives in the UK with her husband, two children and their hyperactive cockapoo, Paddy.

Expertise: Makeup, hair care
Education: Oxford Brookes University

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