In the jungle of bathroom products, distinguishing those that can become dangerous if they become moldy from those that remain safe years after their expiration date is crucial. A scientist gave us the keys to knowing, beyond theoretical dates, what to throw away (for your safety) and what you can keep (for your budget!)
The bathroom is a sanctuary of beauty and well-being, but it can also become a refuge for expired cosmetic products. Dr Kerstin Effers, expert in chemistry and environmental health, guides us on the lifespan of these products.
The 30 month rule
According to Dr. Effers, legislation requires cosmetic and personal care products to be stable for at least 30 months when unopened. After opening, a symbol on the packaging indicates their durability. “I recommend noting the opening date on the product to help you keep track,” says Effers.
How long does an opened beauty product last?
The condition of a cosmetic product can often be assessed by: its smell, appearance and consistency. “If these aspects are normal, the product can usually be used even after the expiration date,” explains Effers. This is due to preservatives like alcohol and parabens, although their presence is a double-edged sword in terms of environmental impact and allergy risks.
The case of organic cosmetics
Organic products, on the other hand, have a shorter shelf life. Effers warns: “Essential oils can quickly become rancid, not from microbes, but from oxidation.”
Is your product solid or liquid?
Water-based products, such as shower gels and face creams, are more likely to spoil than dry cosmetics like powders. Effers specifies: “With dry products, mainly mineral, there is not much to fear. Fungi and bacteria require water to develop.”
How to prevent your cream from becoming moldy and extend its lifespan as much as possible
To maintain product durability, strict hygiene is essential. Effers advises: “Use a clean spatula or brush when scooping produce, especially those in jars, to avoid bacterial contamination.”
These products which are exceptions
Certain precautions should be taken with specific products. For example, mascara should be changed every six months for hygiene reasons, and sunscreens with octocrylene should not be used beyond their expiration date due to health risks.
Finally, when you really have to throw away an opened product, don’t forget to think about the environment! Put it in the household waste bin and not in the recycling, the planet will thank you.