Sodium Lauryl Sulphate and Sodium Laureth Sulphate
The common denominator between sodium dodecyl sulfate (SLS) and sodium lauryl sulfate (SLES) is that both are surfactants (or surfactants). An aqueous solution of a surfactant dissolves oil or grease. So the oil on your skin can be washed with a surfactant. Surfactants work by reducing surface tension and thus produce more foam and are more flexible.
Why it is better not use surfactants
Surfactants can remove sebum and dirt, but their main drawback is that they easily dissolve skin natural oils. So too much use of surfactants can cause an uncomfortable barrier to your skin, and then your skin can get dry, flaking and dehydrated and may have spots and red patches.
Sodium dodecyl sulfate is the most irritating to the skin. Despite all the negative reviews, there's no evidence shows that it's cancer or toxic. It is now used primarily to test the irritation of a small patch of skin, which can be used to measure the soothing effect of cosmetic ingredients. The outermost layer of the skin is broken down by low concentrations of sodium dodecyl sulfate. So, conversely, sodium dodecyl sulfate is sometimes used to help other active ingredients penetrate deep into the skin. But it doesn't necessarily make you more beautiful.
In conclusion, we should avoid the use of sodium dodecyl sulfate (or sodium dodecyl sulfate). Unfortunately, it is still used by manufacturers because it is very cheap and can produce a lot of bubbles.
And sodium Laureth Sulphate?
Sodium lauryl sulfate and sodium lauryl alcohol sulfate can be confusing. Sodium lauryl sulfate is also a surfactant, but has a smaller irritation than sodium lauryl sulfate. The product is foamed by adding sodium lauryl sulfate. If you are sensitive, you should be careful to apply sodium lauryl sulfate. The concentration of sodium lauryl sulfate in the product and whether the product contains supplemental oil determine whether it will irritate the skin. If the skin feels tight after washing, the product may be irritating to the skin. In the ordinary skin care, do not often use products containing sodium lauryl sulfate, use too much, and rinse thoroughly with water.