Fleuri Beauty

BOOST SERUM

$82.00

Replenishes lost ceramides from aging and creates a firmer and smoother texture. The ceramide-filled stratum corneum helps promote the absorption of toners and serums for lasting results.

40 ml / 1.3 fl oz

RECOMMENDED FOR: All Skin Types

Subscribe & Save

Why It Works

Boost Serum is formulated with a high concentration of our proprietary nano-encapsulated natural ceramides. Japan is one of the leading countries in ceramide research, and our formula is designed to deliver ceramides in their most effective form. By preserving the natural lamellar structure, the ceramides remain fresh and are able to penetrate deeply into the skin.

Ceramides naturally present in the skin gradually decrease with age, leading to dryness, irritation, and visible signs of aging.

As a key component of the skin’s moisture retention and barrier function, ceramides play an essential role in maintaining healthy skin. By replenishing ceramides deep within the skin, Boost Serum helps support a firmer, more resilient complexion that is less prone to dryness. In addition, a ceramide-rich stratum corneum allows lotions and serums applied afterward to absorb more easily, helping to extend their benefits.

Natural Ceramide

Our ceramides are pure, naturally derived and not synthetically produced. They are highly compatible with the skin and support multiple essential functions.

Type 1 ceramide (EOP)

Helps strengthen the skin barrier while improving firmness and elasticity.

Type 2 ceramide (NS/NG)

Offers excellent moisture retention and is the most abundant ceramide found in human skin.

Type 3 ceramide (NP)

Supports the skin barrier, improves moisture balance, and helps protect and repair dry skin.

Type 4 and 5 ceramide (EOH / AS / AG)

Help form and maintain the lipid barrier within the stratum corneum.

Type 6 ceramide (AP)

Provides strong hydration support, promotes skin turnover, and helps reduce the appearance of fine lines.

Type 7 ceramide (AH)

Helps regulate cell renewal and supports a balanced skin microbiome.

Recommended For

・When skincare products don’t absorb well
・Dry or sensitive skin
・Skin prone to itchiness or redness
・Rough texture with a lack of firmness and glow
・Acne-prone skin
・Unbalanced or easily irritated skin
・Skin that feels rough or stiff
・Peeling skin in babies
・Visible fine lines and wrinkles

Proprietary Ceramide Formula

Using advanced technology, we are able to deliver ceramides deep into the skin while preserving their natural lamellar structure, allowing them to perform at their full potential. While many ceramide serums exist, maintaining this lamellar structure during delivery is extremely challenging. Our Boost Serum encapsulates ceramides in specialized capsules, protecting their structure and freshness, and delivering them effectively into the skin without compromising their integrity.

Olive Fruit Oil

Highly compatible with the skin, olive fruit oil helps prevent moisture loss from the stratum corneum while softening the skin. This supports smoother texture and helps reduce the appearance of fine lines caused by dryness. In addition to skincare, it is also widely used as an ingredient in food and pharmaceutical products, and its production in Japan has been increasing in recent years.

Rosa Canina Fruit Oil

Rich in vitamin C, this oil helps reduce oxidation and supports the skin against various concerns. It also provides moisturizing benefits and helps improve the appearance of aging.

Jojoba Seed Oil

With a structure similar to the skin’s natural sebum, jojoba seed oil absorbs easily and blends seamlessly into the skin. It forms a light protective layer on the surface, helping to prevent moisture loss and keep the skin hydrated.

Full ingredient list

Water, Propanediol, Butylene Glycol, Glycosphingolipids, Squalane, Tocopherol, Macadamia Seed Oil, Jojoba Seed Oil, Olive Fruit Oil, Rosa Canina (Rosehip) Fruit Oil, Glycerin, Xanthan Gum, Pentylene Glycol

Formulated without

Oil, Alcohol, Colorants, Parabens, Phenoxyethanol, Petroleum-Based Surfactants, Synthetic Fragrance, Antioxidants, Mineral Oil, UV Absorbers, Preservatives, Silicone, Petrolatum, Phthalates, Sulfates, SLS (Sodium Lauryl Sulfate), Formaldehyde, Urea, and Palm Oil.

Step 1: Dispense

After cleansing, allow your skin to settle briefly before use. Apply to dry skin and dispense 2–3 pumps into your palm. (For very dry skin, use 3–5 pumps.)

Step 2: Apply

Spread between your palms, then gently smooth over the skin. Layer on areas that feel especially dry. Avoid patting, as it may cause unnecessary irritation.

Texture : liquid

Fragrance : fragrance-free

pH : 6.5

Customer Reviews

Based on 33 reviews
61%
(20)
36%
(12)
3%
(1)
0%
(0)
0%
(0)
J
Janice Steis
Ok serum

Not as good as SK11 I did try it but I felt it was not as good

S
Sherry Faris
Skin type: Dry to mature
Skin concerns: Dryness
Age: 55 to 64
Boost serum

All your products for the face and neck have been a game changer for me . I’ve always had a problem with clogged pores and oily skin and now dry skin until I found out about your line of products. No more clogged pores or problem issues with my face …Thank you

Hello Sherry,
It's wonderful to know we've helped address your concerns with clogged pores and oily skin, providing a solution for a healthier complexion. Thank you for choosing our products, and we're here to support your skincare journey.

K
K_Chihuahua
Great Serum

I love Japanese skin care and this is one of the best!
Sensitive skin friendly and works great.
Ita?s pricey but all you need is 2 pumps and last long time.
I have sensitive dry skin and this doesna?t cause any irritation or redness but make my skin smooth and well hydrate.
If you have sensitive skin, this is highly recommended!!!

L
Lostplanet
Gentle and lightweight

This is a gentle and lightweight day serum for sensitive skins. Very soft and subtle feel on the face without leaving a residue. Non-irritating. Great for oily or combination skins.
Recommended

S
Santa Barbara Gal
Very light serum which left my sensitive skin clear and feeling silky

My Skin Type: Pale, dry, sun-damaged, sensitive, prone to redness
My AM Facial Routine: Wash/exfoliate, serum, moisturizer with SPF
My PM Facial Routine: Wash, serum, heavier overnight moisturizer
My Review of this product:
Pros: Very lightweight-almost as thin as water, no discernable scent, absorbs quickly into skin, no stickiness after application, left skin feeling incredibly silky, works well under regular moisturizer, attractive bottle would look nice on any vanity
Cons: The waterlike viscosity makes it a little difficult to apply so you end up using more than necessary. It's relatively expensive for the size bottle and the amount you need to apply

T
Tiffany
Very Nice

Incredibly nice for people with sensitive skin. It's one of my go-to serums because it helps to soften my skin without dryness or irritation. It's lightweight and it absorbs quickly and it hydrates and nourishes really well.

F
Fendly Feedback
Hydrated Skin

This review is for Fleuri - Boost Serum.
I have super sensitive combination skin and this worked wonders on me.
The serum itself feels luxurious. It takes a while to absorb, but when it does it doesn't leave you looking greasy or shiny. Say goodbye to dry patches because this product hydrates unbelievably well.

G
Gaby at starting Fresh blog
A serum splurge

This serum by Fleuri is a splurge skincare item but it does feel lovely on the skin. I have combination sensitive skin and the dry, cold months leave my skin feeling so dry. This serum works well to hydrate gradually, leaving my skin feeling softer, supple and well hydrated. I like that the serum also works in hot humid weather. I used it while traveling in Asia and it doesn't feel heavy in hot and humid weather.

Replenishing Ceramides

Ceramides are often referred to as the foundation of healthy skin, as they help both retain moisture and protect the skin from external stress. However, the ceramides naturally present in the skin gradually decrease with age. Studies show that by the age of 50, ceramide levels can drop to about half of what they are in your 20s. For this reason, Japan has long focused on developing high-quality ceramides. Our proprietary ceramides are designed to penetrate the skin without losing their natural function, helping to lock in moisture and keep it there. This supports skin that stays hydrated, smooth, and less prone to dryness.

Strengthening the Skin’s Foundation

When the skin lacks ceramides, even the most advanced formulations may not deliver their full benefits. Without enough ceramides, moisture is easily lost, and active ingredients are less able to penetrate effectively, often evaporating before they can fully work. That’s why replenishing ceramides first is key. By filling the stratum corneum with ceramides, you create a well-prepared foundation that helps lotions and serums absorb more effectively. This step is essential for maximizing the benefits of your skincare routine. In addition, our Boost Serum helps support prolonged absorption, allowing the benefits of the products applied afterward to last longer.

You may also like