Sorting through the clutter beneath the bathroom sink is often overlooked in our to-do list. Frankly, many of us haven’t tidied up the bathroom or discarded outdated shampoo bottles since our last relocation. There are instances when an old shampoo bottle unexpectedly resurfaces from the depths of a cabinet or linen closet. Is it acceptable to use a shampoo that you bought three years prior? Does shampoo have an expiration date, and what happens if you use expired shampoo or conditioner on your hair? We’ll delve into these questions and more, ensuring you know when to discard old bottles and when to indulge in a luxurious lather.
Although the FDA doesn’t necessitate that cosmetics include expiration dates, shampoos and conditioners do have a shelf life. Once opened, a shampoo bottle is exposed to air, humidity, and the various organisms found in your bathroom. Over time, preservatives degrade, causing the shampoo to spoil. Hair care products also tend to lose their effectiveness in cleaning and moisturizing as they age.
Shampoo bottles can typically remain viable for around three years after purchase, but this duration significantly diminishes once the bottle is opened. Most companies conduct tests to determine the longevity of their products post-opening. Keep an eye out for the “period after opening,” or PAO, listed on the bottle. You might notice a symbol resembling an open lid accompanied by a number like 12M, 18M, or 24M, indicating the number of months the bottle can be used after opening.
In the event that the shelf life is not specified on the shampoo bottle, it’s generally safe to use for about 18 months after opening. Natural hair products without preservatives might only last for six months to a year. Consult the hair care company’s website for specific information on product longevity.
However, recalling the exact purchase date of an old shampoo hidden at the back of a drawer can be challenging. In such cases, look for signs that the shampoo has expired.
To determine if a shampoo or conditioner has gone bad, squeeze a small amount into a container or onto your hand. If the shampoo appears lumpy, has separated, or is discolored, it’s time to discard the bottle and invest in a fresh one. An unpleasant odor also suggests that the shampoo has deteriorated. Lastly, if you can’t get the shampoo to lather, it’s a clear sign that its shelf life has expired.
While using old shampoo may not always harm your hair, the results are likely to be unsatisfactory. It may not clean as effectively, leaving behind residue that can make your hair appear dull and lackluster. Moreover, shampoo riddled with bacteria and fungi can irritate your scalp, potentially causing itching, dandruff, and other skin issues. For these reasons, it’s best to dispose of expired shampoos and conditioners.
While all shampoos eventually spoil, there are strategies to maximize their shelf life:
- Keep hair care products in a cool, dark place like a cabinet or linen closet until they’re ready for use.
- Always secure the lid immediately after using your shampoo to prevent water from seeping in.
- When a shampoo bottle is nearly empty, avoid sticking your fingers inside or filling it with water. Instead, store it upside down for easier access to the remaining shampoo.
