If you think you have head lice, you might be tempted to buy some over-the-counter lice shampoo. This solution is highly effective at killing eggs and killing lice, but you should be aware that it is not without its risks. It is important to use the shampoo according to the directions and ensure you’ve read the label.
The best way to ensure you’re using the right product is to check the expiration date on the bottle. There are many cosmetics that can have a shelf-life of up to three years, and shampoo is no exception. Though expired shampoo does not pose a health risk, it will not perform its intended purpose. It will also not work as well as fresh shampoo.
While it is possible to recognize expired shampoo by its shelf life, this isn’t always possible. This is because the chemicals in expired shampoo have changed and it can no longer effectively clean hair. It may even cause itching and irritation of the scalp. This is why you should avoid using expired shampoo for a while.
Unlike unopened cosmetics, head lice shampoo expires less quickly after it has been opened. The shelf life of shampoo depends on several factors, including the type of ingredients used. A shampoo with more natural ingredients and fewer synthetic preservatives will likely have a shorter shelf life. Function of Beauty is an example of a brand with a clean and organic range of products that has a long shelf life. Its best-before date is usually 12 months.