When you launch a beauty product under your brand, its quality does not stop at the moment of manufacture; it extends throughout its life on the shelf and in the customer's hands. Understanding shelf life and stability protects you from complaints and risks, and gives your product credibility. Let's simplify these essential concepts.

The difference between shelf life and stability

Shelf life is the period during which the product remains safe and effective. Stability, on the other hand, means the formula's ability to keep its properties, texture, color, scent, and performance, without noticeable change over time and under different conditions. A stable product is the foundation of any reliable shelf life.

The period-after-opening symbol

You may have noticed the symbol of an open jar with a number and the letter M next to it on products. This is the PAO symbol, the period after opening, which indicates the number of months the product stays good after it is first opened.

  • The number represents months; for example, twelve means one year of use after opening.
  • It is completely different from the expiry date of the sealed product.
  • It helps the customer know when to stop using the product.
  • It is set based on the nature of the formula and its testing.

The role of preservatives

Products that contain water are exposed to microbial growth, and this is where preservatives come in to protect the product and the customer. Pure oils such as argan oil are less prone to this, but they can oxidize. Choosing the right preservation system keeps the product safe throughout its life without harming its quality.

Why stability testing matters

Stability testing exposes the product to different conditions of temperature, light, and time to simulate its real journey from factory to customer. These tests reveal early any change in color, odor, or separation between ingredients, and give you the confidence to set an accurate and realistic shelf life before launch.

Ensuring stability and shelf life begins with sound manufacturing and careful documentation. A manufacturer like Assil Ouargane, in Morocco, works to strict quality standards in producing argan oil, amlou, and care products, so your product, under your brand, reaches every customer safe, stable, and trustworthy.