Real Results: Beauticate Readers Trial Système Bio+ Oil Serum

We asked Beauticate readers to trial the Système Bio+ Oil Serum over two weeks, sharing before-and-after images and honest feedback. See the difference in glow, hydration and skin tone.

When we called on our Beauticate community to trial the Système Bio+ Oil Serum, we weren’t looking for influencers.

We were looking for real people with real skin concerns – dryness, dullness, fine lines, and loss of radiance – willing to document their experience honestly.

Our readers were selected across different skin types and lifestyles, each committing to the trial.

No scripts.

No paid endorsements.

Just the serum – and the results.

Système Bio+ Oil Serum Review

The Product: What They Trialled

Système Bio+ Oil Serum is a French-formulated facial oil built around an active ingredient – ANTILEUKINE 6™, derived from golden seaweed and clinically proven to hydrate, soothe and protect the skin.

The formula also contains stable Vitamin C – rare in an oil format – along with Vitamin E, making it a genuine multi-tasker. And it is fragrance-free.

The Bio+ Oil Serum is designed to target:

Dehydration and dryness
Dullness and lack of radiance
Fine lines related to dehydration
Loss of suppleness in the face, neck and decolletage
Environmental skin stress

What sets it apart is the texture. Unlike thicker, occlusive facial oils, Bio+ behaves more like a dry oil – lightweight, fast-absorbing, and comfortable enough to wear morning and night, under makeup or on bare skin.

Our trial team used the serum over a two-week period, applying it as part of their existing routine and documenting what they noticed.

The Trial Criteria

Each participant:

Completed the full trial over two weeks
Submitted before-and-after imagery
Provided honest written feedback
Received the product as a gift
Had no obligation to post on social media
The only requirement: authenticity.

Système Bio+ Oil Serum Results: Real Reader Trial

Across the trial, our Beauticate readers documented their results through before-and-after imagery and written feedback.

What followed was exactly what you’d expect from a product powered by active ingredients: a mix of standout results, personal discoveries, and, in some cases, signs that this formula isn’t universally suited to every skin type.

In other words, a trial that reflects real life.

Here’s a breakdown of who saw the biggest improvements, how the formula performed under makeup and across different areas of the skin, and what to know before introducing it into your own routine.

Sheryn | Glow + Fine Lines

Sheryn is a single mum of three who used the Bio+ Oil Serum once daily over the trial period.

From the very first application, she noticed the difference.

“The feeling of the oil was very luxe and was quickly absorbed into the skin with a little gentle massaging.”

Within days, the results were clear.

“My skin has been feeling fabulous, really hydrated and has such a glow to it. I feel as though some of my fine lines have disappeared as well – what a win!”

She describes the Bio+ as a “really luxe, hydrating treat for the skin – a definite must for my skin routine.”

She’s already added it to her permanent rotation.

Sheryn

Editor's Note:

Glow and fine line softening within days of use is a strong indicator of deep hydration at work. When skin is properly replenished, it reflects light more evenly - which is exactly what Sheryn noticed.

Samantha | Neck + Décolletage + Everyday Wear

Samantha is a teacher who used the Bio+ twice daily – morning and night – throughout the trial.

Her first impression covered every detail.

“The oil was much lighter in weight than I expected, which I loved as face oils can sometimes be way too heavy. It was light, dewy and easily applied and absorbed. I love that it was a clear liquid and not coloured as this meant it didn’t stain my pillow slip, unlike other oils I have used.”

The results were equally impressive.

“My skin feels so much more supple, in particular in my neck and décolletage. My skin on my face feels much more hydrated and I have not experienced any dryness since using Système Bio+. Even on the days when I’ve not had enough water or am tired, my skin is still hydrated.”

Under makeup, it held its own.

“No oil slick feel. It absorbed into my skin well and worked really quickly. I am surprised at how quickly I noticed results.”

She describes the Bio+ as “lightweight, non-greasy, hydrating and a new regular addition to my skincare routine.”

Samantha

Editor's Note: Improvement in the neck and décolletage is hard to achieve with topical products alone. These areas have thinner skin with fewer sebaceous glands - making consistent, deep hydration the key.

Katelyn | Hydration + Skin Recovery

Katelyn is a Senior Product Manager who applied the Bio+ Oil Serum once daily across the trial.

Her first application was promising.

“It sunk into my skin very well at the start of the trial.”

As the trial progressed, hydration improved – and something unexpected happened.

“Hydration definitely increased and my skin feels very soft. It has also helped the appearance of my skin and I had a little perioral dermatitis which was cleared up too.”

She describes the Bio+ as “a fresh-feeling skin oil that doesn’t leave skin feeling greasy or sticky but soaks in. My skin feels soft and healthy without dryness.”

Her one nuance: over time, she found daily application was more than her skin needed.

“I possibly only need to apply every second day rather than every day – my skin now feels a little oily.”

She would continue using it – just at a frequency that suits her skin.

Katelyn

Editor's Note: The improvement in perioral dermatitis - a common but stubborn skin condition - is a notable finding. The ANTILEUKINE 6™ complex in the Bio+ has documented soothing and anti-inflammatory properties.

Ashleigh | Pigmentation + Skin Tone

Ashleigh is a primary school teacher who used the Bio+ once daily, applying it more generously at night.

She was immediately drawn to the packaging.

“I really liked the packaging – it feels clean, minimal but also luxurious. The dropper is easy to use and gives good control over how much product you apply, which I found especially helpful when using different amounts for day versus night.”

The results built gradually – but clearly.

“Whilst hydration was the most impressive result, I also saw subtle but clear improvements in my skin tone. Within about 10 days I noticed a slight reduction in pigmentation and my freckles appeared softer and less prominent. My skin looks more even overall and has a healthier glow – it feels like improved skin quality rather than just surface shine.”

Under makeup, it created the perfect base.

“It didn’t cause any patchiness or separation, which I sometimes find with oils. If anything, it created a really nice hydrated base and my makeup sat smoothly over the top.”

She describes the Bio+ as “a rich hydrating oil” and has thoroughly enjoyed the trial.

Ashleigh

Editor's Note: Pigmentation improvements within ten days suggest the stable Vitamin C in this formula is doing its job. Vitamin C is known to inhibit melanin production - Systeme's use of a stable form means it stays active and effective throughout the product's life.

Patterns we noticed

Across the trial, several consistent themes emerged.

Hydration was universal and fast. multiple readers noticed improved moisture levels within the first few days – not just surface softness but genuine, lasting comfort across the face, neck and décolletage.

Glow appeared early. Radiance was one of the first visible changes, likely because improved hydration directly affects how skin reflects light.

The neck and décolletage responded well. This area is frequently overlooked and notoriously difficult to treat – making the results here particularly compelling.

The texture impressed everyone. The dry oil profile – lightweight, fast-absorbing and non-greasy – made it easy to use morning and night, and genuinely compatible with makeup.

Results were personalised. Some readers found daily use optimal, others found every second day worked better. The formula delivered across different usage patterns and skin types.

Importantly, nobody described overnight miracles. Instead, readers reported progressive, real improvements that built over the course of the trial.

That’s the kind of result worth trusting.

The Verdict

What makes Système Bio+ Oil Serum compelling is the combination of a clinically backed active ingredient, a lightweight dry-oil texture and real, visible results across a diverse group of readers.

For those dealing with dehydration, dullness, early fine lines or uneven skin tone – particularly in the over-35 category where natural oil production naturally declines – this is a formula worth taking seriously.

And based on our Trial Team’s documented experience, it delivers.

A Note on Skin Types & Sensitivity

As with any skincare product, particularly those containing active ingredients, results can vary depending on individual skin type and tolerance.

While the majority of our trial team experienced significant improvements in hydration, glow and overall skin quality, a small number of participants with highly reactive or sensitised skin reported irritation during use. This was most notable among those with pre-existing conditions such as rosacea or known sensitivity to Vitamin C.

In one case, a participant chose to discontinue facial application but continued using the serum on the neck, where it was well tolerated and delivered positive hydration results.

This is not uncommon when working with potent actives. Ingredients like Vitamin C can be transformative for many, but are not universally suited to every skin type – particularly those that are compromised or highly reactive.

As always, introducing any new active product gradually and patch testing prior to use is recommended, especially for sensitive skin.

Système Bio+ Oil Serum FAQ

How do you use the Système Bio+ Oil Serum?

Apply a few drops to clean, slightly damp skin. Massage gently until absorbed. Use morning, night or both – adjusted to what your skin needs.

Does the Bio+ Oil work under makeup?

Yes. Multiple testers used it as a base before foundation and reported no patchiness or separation – and a noticeably smoother finish.

How quickly will I see results?

Glow and hydration improvements were reported within the first few days. Skin tone and pigmentation improvements were noticed within ten days of consistent use.

Is the Bio+ Oil suitable for sensitive skin?

The formula is fragrance-free and built around the ANTILEUKINE 6™ complex, which has documented soothing and anti-inflammatory properties. Those with a known sensitivity to Vitamin C should patch test first.

What is ANTILEUKINE 6™?

A clinically proven active derived from French golden seaweed. Studies show it improves skin smoothness by 21%, reduces dehydration wrinkles by up to 9% in 56 days, and delivers a soothing, anti-inflammatory effect lasting up to 48 hours.

Shop the Système Bio+ Oil Serum

If you’re looking to boost hydration, wake up your glow, soften fine lines or even out your skin tone, the Système Bio+ Oil Serum is available now.

Shop the Système Bio+ Oil Serum and use code BEAUTICATE at checkout for 20% off.