DOSSIER BEAUTÉ

Oil vs. Serum: How to distinguish between them, choose them, and layer them?

ONCE YOU UNDERSTAND THEIR ROLE, EVERYTHING BECOMES CLEARER

This is a question we are asked very often: should you use a serum or an oil? What is the difference? Should you apply them together or separately? Once you understand their role, everything becomes clearer: oil and serum have neither the same function, nor the same texture, nor the same purpose, and that is precisely what makes them a perfect duo.

SERUM: AN INFUSION OF TARGETED ACTIVE INGREDIENTS

A serum is a concentrated blend of active ingredients, often formulated to target specific skin concerns. Its texture is generally fluid, aqueous, or slightly gel-like. It's a treatment that penetrates quickly into the deeper layers of the epidermis, where creams or oils act more on the surface.

There are as many serums as there are needs:

• Vitamin C serum
To brighten the complexion and smooth fine lines.

• Hyaluronic acid serum
To plump and intensely hydrate.

• Retinol or fruit acid serum
To boost cell renewal.

• Serum containing niacinamide, zinc, or ceramides
To soothe and regulate sensitive or blemish-prone skin.

WHEN TO USE IT?
Immediately after cleansing and toning, apply to clean, slightly damp skin. Use a small amount with gentle pressure and can be followed by a cream or oil.

GENTLERIST
Gold Drops

OIL: THE NOURISHING AND PROTECTIVE TREATMENT

Vegetable oil acts on the surface. It doesn't penetrate the deeper layers, but it's essential for nourishing the skin, strengthening the hydrolipidic barrier, and preventing dehydration. It seals in previously applied skincare products—like serum—and creates a protective shield against external aggressors.

Contrary to popular belief, oils are not just for dry skin. There are very light oils, with a dry touch, perfectly suited to combination or oily skin. Some are even sebum-regulating, anti-inflammatory, or healing.

WHEN TO USE IT?
As the final step in your evening routine, or even on its own as a replacement for cream, depending on your needs. In the morning, opt for a light, non-comedogenic oil if you plan to apply makeup afterward.

IN FIORE
Calm Complex

CAN THEY BE USED TOGETHER?

Yes! Here's how to layer them intelligently: The golden rule in cosmetics: always go from the lowest molecular weight to the highest, that is to say from the lightest to the fattiest.