When we buy a skincare product, we naturally expect it to look, smell and feel the same from the first use to the last. A cream should not suddenly become watery. A serum should not turn a completely different colour. And a product that was perfectly pleasant to use when it was opened should not gradually develop an unusual smell.

A cosmetic cream may look simple when you use it. You scoop out a little, spread it on your skin, and it disappears into a smooth layer. But making that cream is a surprisingly complex process.

Preservatives are one of those cosmetic ingredients that often receive a bad reputation. You may see products advertised as “preservative-free” and naturally wonder: if preservatives are unnecessary, why are they used in the first place?

When we apply a serum or cream, it is tempting to imagine the active ingredients simply travelling into the skin and getting to work. But the skin is not an open surface.

When your skin feels dry, the obvious solution seems simple: use a moisturizer. But what does a moisturizer actually do? It turns out that “moisturizing” is not one single process. Different ingredients work in different ways, and the best-performing products often combine several approaches. Some ingredients attract water, others help smooth the skin, while others reduce the amount of water that escapes from its surface.

The skin barrier is one of those skincare terms we hear everywhere. Products claim to “support the skin barrier,” ingredients are promoted as “barrier-friendly,” and damaged skin is often described as dry, tight or sensitive. But what actually is the skin barrier?

When developing a new skincare product, the active ingredients are often the first thing people talk about. A brand may start with a particular peptide, vitamin, botanical extract or other ingredient and build the product concept around it.

Hyaluronic acid, also known as sodium hyaluronate, is a naturally occurring molecule within the human body, primarily found in the skin, that boasts numerous benefits.

The story of Iconic French Cosmetics brands - L'Orèal, Caudalie and Yves Rocher

Choosing the right preservatives for cosmetics involves considering factors like product type, target users, and formula nature. With over 200 options, assessing solubility, pH compatibility, and allergenic potential is crucial for safety and efficacy. Preserving natural formulas often relies on certified preservatives and plant extracts. Despite natural origins, preservatives may pose risks and require careful consideration of concentrations and pH levels. Maintaining microbial purity is essential, especially in water-based products, to ensure product safety and integrity.