Do you remember that when you go to a hair salon to wash your hair, the barber always wears gloves to wash everyone's hair.

But have you ever thought about why you would do this? It could be for the sake of cleanliness and hygiene, or to avoid frequently washing your hair and injuring your hands, but it could also be because the shampoo has some tricks and you dare not use it yourself.

A reporter from Bazhong Evening News once conducted a secret investigation of hair salons on the market and found that the shampoo situation in these shops was not optimistic

① Low cost, unclear production information

The price is cheap, usually in large bottles weighing 10 pounds, but the price is only 48 yuan. Although many of the instructions on the bottles are in English and Japanese, which appear very stylish, most of them do not indicate important production information such as production date, shelf life, and place of origin.

② Counterfeit and inferior products, filling under false names

Purchase cheap shampoo from wholesalers and pour it into well-known brand shampoo bottles to pass off inferior products as good.

So Xiao Ai suggests that if you go to a hair salon to have your hair cut, you can also bring your own shampoo. When buying shampoo, try to avoid some bad ingredients as much as possible. Today, I will introduce the "tricks" in shampoo.

1、 Try to use shampoo containing these ingredients sparingly, as some may even have potential cancer risks

1. Sodium dodecyl ether sulfate (SLES), sodium dodecyl sulfate (SLS)

It belongs to the sulfuric acid formula and has a relatively low production cost, so it is commonly used in cheap shampoos. Although this type of shampoo has strong cleaning and stain removal power, it is also easy to wash away the beneficial oils and fats on the scalp and hair.

2. Fatty acid sodium salt, sodium hydroxide (caustic soda)

Belonging to the alkaline formula ingredients, shampoos containing this ingredient generally have strong cleaning power and good biodegradability, making them more environmentally friendly. Due to its alkaline nature, it can easily dry hair and scalp, and excessive cleaning power can also wash away beneficial oils.

3. Bromonitril, imidazolidinylurea compounds

Preservatives may be added to shampoo, mainly bromonitrol and imidazolidinylurea compounds, which release a certain amount of formaldehyde.

4. Phthalates, p-hydroxybenzoate esters

Some shampoos may contain phthalates and p-hydroxybenzoates, which have potential estrogen activity. There is a dispute at present, which may cause endocrine disorder, early puberty of girls, or developmental defects, and increase the risk of breast cancer in adult women.

According to the Survey of Phthalate Esters Detected in Cosmetics published by the Beijing Center for Disease Control and Prevention through random inspection of cosmetics on the market, the detection rate of 20 washing and hair care cosmetics is 30%, and the detection rate of Phthalate Esters in 12 perfume is 92.3%,

2、 How to choose a bottle of shampoo that suits oneself?

Who doesn't want to have a flowing black hair? I'm sure many people will put effort into choosing shampoo, so how can we choose the one that suits us?

1. Big oil head

People with big oily hair usually have fine and soft hair, and there is a problem of excessive oil secretion, so their hair is particularly prone to oiliness. If they don't wash their hair in a day, it will become greasy and flat. It is recommended to choose a shampoo containing ingredients such as menthol, salicylic acid, ketoconazole, selenium disulfide, and zinc pyrithione.

2. Dry hair

Hair is dry and hard in texture, prone to tangling and splitting, and dull under sunlight. This belongs to dry hair, and it is recommended to use shampoo containing betaine surfactants, amino acids, and other ingredients. It can also be paired with hair care essential oils containing camellia oil, coconut oil, and other ingredients.

3. Neutral hair

Neutral hair has a certain degree of elasticity and luster, and the scalp is not dry or prone to oiling. Therefore, there is a wide range of shampoo choices, generally weakly acidic and non irritating to the scalp shampoos are acceptable.

4. Excessive dandruff

If there is a lot of dandruff in the hair, it is generally recommended to choose a shampoo containing ketoconazole, selenium sulfide, pyriprone ethanolamine salt, pyriprone zinc and other ingredients. These ingredients can inhibit Malassezia and help with dandruff and antibacterial effects.

Of course, when it comes to choosing shampoo, if conditions permit, it is best not to use the same shampoo for a long time, as each shampoo contains different softening ingredients, surfactants, etc. If they can be used alternately, it can meet the needs of caring for hair and thoroughly cleaning it.

3、 Don't believe shampoos that boast about their effectiveness

At present, the types of shampoos on the market vary greatly, especially some shampoos that claim to have effects such as "hair growth" and "blackening". Can they be trusted?

1. Hair growth

Shampoo, as a daily care product, is not a medical product. Therefore, when advertising, it is not allowed to promote its medical effects, such as hair growth, which is actually illegal.

Director Zhang Yan from the Dermatology Department of the Second Traditional Chinese Medicine Hospital in Sichuan Province explained that the number of hair follicles on each person's head is already determined at birth, and there will be no new hair follicles added in the future. Currently, shampoo on the market does not significantly improve the number of hair follicles and hair, so "hair growth" shampoo is not reliable at all.

2. Dye black

Is the black hair shampoo that turns black with just one wash reliable? Dr. Chen Xixue, director of the Department of Dermatology and Venereology at Peking University First Hospital, said that the shampoo that can dye white hair black in the market actually contains p-phenylenediamine, which is also present in hair dye. However, due to its short usage and dyeing time, people who are allergic to hair dye will also be allergic to using this type of shampoo, and white hair cannot be blacked out.

At present, there is no definite treatment plan for white hair, let alone any specific medication for treating white hair, let alone shampoo?

4、 Washing hair also requires attention to detail

Washing hair may seem like a trivial matter, but there is actually a hidden knowledge behind it. Only by mastering the methods of washing hair can hair grow better.

1. First comb and then wash your hair

Before washing hair, you can choose a round headed and wide toothed comb to comb open the hair, and then rinse it with water. In addition to reducing the amount of shampoo used, it can also avoid too much stimulation to the scalp.

2. It's better for shampoo to make foam first

Many people are used to applying shampoo directly to their hair, but unsaponifiable shampoo will stimulate the scalp and even cause serious hair loss, so it is recommended to put shampoo on the hand first, and then apply it to the hair after foam is formed.

3. After washing, wipe first and then blow

After washing hair, it is recommended to wrap it with a soft towel and use a pressure towel to absorb excess moisture from the hair. This will allow the hair scales to close and protect the hair from damage.

4. Control hair washing frequency

The frequency of hair washing varies from person to person, as long as the hair is not greasy or too dry. Generally, it should be done at least 1 to 2 times a week for 5 to 7 minutes each time.