Previously, there was a saying on the Internet that 90% of shampoos contained a component called “polydimethylsiloxane”, which is a so-called silicone oil smoothing agent. It is said that due to the chemical substance of silicon or dimethyl siloxane, the gap between the scales is filled, so the hair is very smooth after washing, but due to the impermeability and inertness of silicon, Blocking the pores makes it easy for the scalp to itch and even hair loss and hair loss. Let's take a look at some common sense about silicone oil shampoo.




Why use silicon. In addition to infant and toddler products in the supermarket, almost all shampoos contain silicone oil. Why do you need to add silicone oil to shampoo? Does silicone oil block hair follicles and damage hair? Silicone oil is viscous and malleable and has a moisturizing and supple effect on the hair. Hair grows from the hair follicles in the scalp, and the main ingredient is keratin. There are many jagged scales on each hair. When the scales are damaged, they will lift up, which will increase the friction between the hairs, causing the hair to tangled in one piece, and more friction will aggravate the damage of the scales. When shampooing, the silicone oil in the shampoo adheres to the gaps in the scales, filling the surface of the hair and making the hair feel supple. The purpose of washing hair is to remove dust from the hair and scalp, and wash off more grease. However, when the hair is washed, the hair swells and moistens, and the moisturizing and softening of the hair is also washed away. The anionic surfactant, used as a shampoo material, cleans the dirt on the head and is itself absorbed by the water under the action of water. After the hair is dried, the hair is blown up due to the same sex. At this time, if it is combed with a plastic comb, it is easy to generate static electricity. The problem of anions can be solved comprehensively with cations, such as quaternary ammonium salt type cationic surfactants. But these can not solve the problem of hair scale damage. The chemicals used in dyeing hair, the heat and the ultraviolet rays of the sun damage the hair. Later, people discovered that oil can solve this problem. The oil lubricates the hair and reduces hair damage during combing. It can be found that the osmanthus oil and conditioner used in the past are mainly fats and oils. PDMS (polydimethylsiloxane) adheres well to the hairline due to its inertness and adsorption, filling the damaged parts of the scales and making the surface of the hair smoother, which is the so-called repair effect. Hair that has been used in silicone shampoos is brighter, easier to comb, and stronger and smoother. PDMS also maintains a stable moisture content in the hair through a shaped protective layer.




The effect of silicone oil on the health of the scalp. A message about silicone oil causing hair loss. Silicone oil is a macromolecular substance that is not absorbed by hair follicles. There is not much silicone oil in the shampoo. Under the cleaning effect of the surfactant, a large amount of water is washed, and it will not remain on the head. In fact, there are many causes of hair loss, such as seborrheic alopecia caused by endocrine disorders, the cause of mental stress, and even postpartum physiological hair loss. Hair follicle blockage is not a cause of hair loss. The hair care effect of PDMS is obvious, especially for the hair that is often hot-dyed, and the hair scaly that is often hot-dyed is more serious. Because silicone oil acts on the hair and fills the open and damaged scales, people worry that it will also deposit on the scalp, clog the pores, causing adverse effects such as redness, inflammation, acne, and hair loss. . Silicone oil is safe for use in cosmetics because it is not irritating to the skin. Although it can form a hydrophobic membrane on the skin, it is breathable. It does not cause acne, acne, hair loss, allergies, etc. It is often used in products that indicate that a is not acne or oil-free. It is the advantage of it compared to traditional oils. Most shampoos add a small amount of PDMS, which allows for some hair care while cleaning the hair. In fact, just as its hair care is very limited, the possibility of PDMS residue clogging the pores on the scalp is also low. Because the content of PDMS in shampoo is very small, below 1%, almost all of it is cleaned up under the action of a cleaning anionic surfactant and a large amount of water. Hair conditioners, hair masks, and other hair care products containing more silicone oil are used as long as they are applied to the end of the hair far away from the scalp. This can be saved, and the hair scales in the hair roots are generally damaged. Less, basically no need for care, if it is rubbed in the hair roots, it is not only greasy but also heavy and flat. There are now new ingredients for the improvement of the PDMS structure, such as ether formation or amino addition, which are more potent and more water soluble than PDMS. Products containing these new ingredients can adhere more effectively with less residue. So friends who are confused about rumors don't have to worry too much. Since PDMS adheres to the hair, the hair becomes thicker, the weight is increased, and the static electricity between the hairs is reduced. Therefore, after the hair is dried, it will not be fluffy or even collapsed. For people with short hair and soft hair, this may not be aesthetically pleasing, so this person can choose shampoo without PDMS.




in conclusion. Silicone oil fills the scales and reduces hair friction and damage. The benefits are obvious, whether it is used now or for a long time. On the contrary, its rumors of the harm to the scalp, there has been no convincing example to prove it, there are always other factors. So if you have hair care needs, don't worry about it when using shampoo with silicone oil. Of course, if you are in other situations, such as if you are short-haired, or if the hair itself is in good condition, or if you are oily, or your hair does not need so much protection, or even do not like silicone oil, you can choose those Silicone-free shampoo and conditioner.