Shampoos contain surfactants that lessen the surface tension of water, which binds to the oil and dirt on the hair that washes away when rinsed. Surfactants are also found in laundry detergent and bath gels. The surfactants in shampoo usually include sodium lauryl sulfate or sodium laureth sulfate and it is combined with a co-surfactant, such as cocamidopropyl betaine, which makes the shampoo viscous.Continue Reading
The hair is naturally coated with an oily substance called sebum that protects it and also gives it a healthy shine. Sebum, however, also attracts dirt and grime. Once the dirt and grime builds up on the hair, it makes it look dull and feel sticky.
Water alone will not be able to wash away the sebum, dirt and grime on the hair because sebum is hydrophilic, meaning it repels water. Shampoo loosens up the molecules of water, which allows it to mix with the unwanted substances on the hair, making them easier to wash off.
Apart from surfactants, shampoo also contains other ingredients, such as conditioning agents, protectants, fragrances and other functional ingredients. Since surfactants strip off sebum, conditioning agents replace this natural protective coating. Some shampoo brands also contain protectants the serve to protect the hair from environmental damages or damages due to constant styling. Functional ingredients are shampoo components that helps the shampoo maintain its viscosity and extend its effectiveness.Learn more about Shampoo & Conditioner
Shampoos that contain essential oils, such as tea tree oil, peppermint and lavender oil, are somewhat effective at repelling head lice, according to Healthline. However, studies have not shown, conclusively, that these shampoos kill head lice. They should not be used to treat head lice.Full Answer >
Shampoos that are geared towards strengthening, volumizing or balancing are good for treating oily hair. Clarifying shampoos, which do not contain moisturizers, are also effective in treating hair that is excessively oily.Full Answer >
Shampoos that are good at preventing hair loss are Tricomin, ThymuSkin, Nisim, Nioxin and Revita. Additional shampoos that help stop hair loss include Nizoral, Hair Genesis and Revivogen. While these eight shampoos help relieve hair, they are very different and contain different ingredients.Full Answer >
A rinse aid is a drying aid that contains surfactants, which are chemicals that reduce the surface tension of water. This prevents water droplets from forming on dishes after the wash cycle. Instead, the water remains as a thin sheet that rolls off of dishes for faster, more thorough drying.Full Answer >