Shampoo also has an expiration date… Degenerated shampoo causes dry scalp and hair loss
Enter 2023.08.20 20:30 Hits 437 Enter 2023.08.20 20:30 Edit 2023.08.20 11:15 Hits 437
If you use a deteriorating product that has passed its expiration date, it may cause problems such as itchy scalp.[사진=게티이미지뱅크]When I organize the bathroom, I often find half-forgotten shampoo or shampoo that I haven’t used in a long time deep in the shelf. Sometimes the shampoo you used runs out and you need to use this shampoo in a hurry. Old shampoo, is it okay to just use it?
It is already widely known that cosmetics have an expiration date, but not many people are aware of the fact that shampoo also has an expiration date. Shampoo also has an expiration date, and depending on the ingredients, it is easily spoiled and deteriorated. This means that blindly using old shampoo is not the right choice.
Shampoo itself is safe, but after the expiration date
Of course, shampoo ingredients vary depending on the manufacturer and product type. However, you can easily find shampoos containing ingredients such as sodium laureth sulfate, benzyl alcohol, panthenol, cocamidopropyl betaine, and zinc pyrithione.
Sodium laureth sulfate, which can be found in most shampoos, is a surfactant and is mainly used in shampoo, body wash, and kitchen detergent because of its strong cleaning power. Cocamidopropyl Betaine is a surfactant made by chemically processing coconut oil, and is often used because it has good cleaning power, prevents static electricity, and makes hair soft.
Benzyl alcohol acts as a preservative, and zinc pyrithione is a common ingredient in hair loss shampoos. Zinc pyrithione is known to be effective in suppressing fungal microorganisms that cause dandruff and help prevent hair loss by suppressing scalp itching and inflammation, which are precursors to hair loss. However, in Europe, it is also a banned ingredient that cannot be used in cosmetics due to its toxicity. Panthenol is often used in creams and ointments as well as shampoos because of its excellent moisturizing and anti-inflammatory effects. In addition, for efficacy and fragrance, various ingredients such as lavender oil, lemon oil, and various flower extracts are used to make shampoo.
Although there is controversy, each ingredient used to make shampoo has its own role and it can be said that it is safe because only the amount that is not harmful to the human body is used. The problem is that these ingredients deteriorate over time, just like cosmetics. It is important to know what the ingredients of the shampoo are, but it is also important to check when the expiration date is and whether the shampoo has deteriorated.
If you pick up the shampoo and look carefully, you can find the expiration date. If there is no expiration date, it is better to check the manufacturing date and use the shampoo within the proper expiration date. As with cosmetics, the shelf life of an opened product is shorter than that of an unopened product. Once shampoo is used, the contents are exposed to bacteria and oxygen and slowly change. The shelf life of unopened shampoo is usually 3 years from the date of manufacture, and it is recommended to use it within 1 year after opening. Natural shampoos with fewer chemicals have a much shorter shelf life, so check carefully before purchasing.
According to WebMD, an American health information media outlet, shampoos that have passed their expiration date may not function properly due to chemical changes. If your hair is strangely frizzy and looks dirty because it hasn’t been washed thoroughly, you should suspect that your shampoo has passed its expiration date.
Shampoo that has passed its expiration date stimulates the scalp and causes dandruff, itching, and even hair loss. In some cases, it affects the eyes, causing itching in or around the eyes. If you use a shampoo that has a bad quality, it can cause a scalp infection caused by bacteria, which can lead to hair loss as well as scarring of the scalp. If the shampoo does not glide smoothly when you put it on your hand and it has lumps, it is a sign that the shampoo has deteriorated, so it is better not to use it.
To make your shampoo last as long as possible
If you want your shampoo to last as long as possible, choose a product that comes in a pump-able container rather than an open-cap shampoo. The possibility of water droplets or air entering inside and spoiling the contents can be reduced as much as possible by selecting the container. Also, avoid adding chemicals or water that is not permitted by the manufacturer as it can deteriorate the shampoo and shorten its lifespan.
When not using shampoo, it is best to store it in a shaded, cool and dry place. Sunlight has ultraviolet rays that can decompose many components of shampoo, so exposure to light can shorten the shelf life to less than one year. Natural shampoos have a shorter shelf life and can easily go bad, so you need to be more careful.
If you find out that your shampoo has passed its expiration date, it’s best to throw it away. Throw the leftover shampoo down the toilet or sink and recycle plastic bottles. However, if the expiration date has passed but there are no signs of spoilage (discoloration, smell), it is also a good idea to use it for cleaning the bathroom, washing clothes or hats, etc.
Shampoo left at the bottom of the container is a waste, so pouring water and shaking it is not a good choice. The bathroom is a place where germs are easy to breed because of high humidity, so if you put water in the shampoo bottle and use it, germs will multiply in an instant, which can be harmful to your scalp and hair.
2023-08-20 11:31:10
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