While many forms of dry shampoo have been used for centuries worldwide, the idea wasn't truly embraced by the people of the United States until the American Journal of Pharmacy published the first broad-scale mention of a dry shampoo and how it should be used in 1918. To support the growing demand, commercialization of dry shampoo began around 1940 and lasted into the 1970s. Recently, dry shampoo has experienced a renaissance with no signs of slowing down.
Dry shampoo is any hair product or treatment that is applied topically to absorb oils and control odors without the use of water. Nearly all dry shampoos come in a powder or spray form. Released in 1940, Minipoo was the first commercially available dry shampoo. Many early varieties of dry shampoo contained fuller's earth, an absorbent and naturally occurring earthy substance commonly found in cat litter
With roots in convenience, dry shampoo offers you a way to refresh your hair that's much quicker than the normal wash-dry-style routine. But it doesn't end there. From encouraging hair health and preserving hair color to conserving water and improving long term care of the elderly, there are countless reasons to add dry shampoo to your hair care regimen.
Dry shampoo works by absorbing the excess oils and debris on your hair and scalp while also absorbing (or masking, depending on the product) any odors. All you have to do is apply the dry shampoo at the roots of your hair, wait for a minute or so, and then brush your hair from roots to ends.
Dry shampoo is a mix of (1) an oil-absorbing substance and (2) an aromatic or scentless freshener. As with most products, there is also considerable variety. No matter what you're after or avoiding – from organic to non-aerosol (and everything in between) – there's a dry shampoo for you.
Dry shampoos not only build up a residue in your hair that can make your scalp feel and appear sandy and grainy, but the products also may dry out your hair, making it brittle or fragile. If the hair is dry and there are no added moisturizing substance, the hair fiber will fracture, and you’ll have a headful of broken hair. Dry shampoo products can also leave a residue on the scalp as scales or scalp rash leading to inflammation that reduces hair growth. At most, you can consistently use a dry shampoo product for no more than three months – and not every day
Shampooing hair is critical to removing the dirt, bacteria and yeast that can build up on the scalp. Repeatedly adding topical products to the scalp, such as oil, clogs pores and creates opportunities for pimples or bacterial infections. Add in hair sprays, volumizers and other hair-care products, and the scalp develops a film that must be removed. It’s true, in the short term, that dry shampoos can safely mask the appearance of debris in your hair. But ultimately, it becomes a contributing factor. Using them forever isn’t a good option. Only a wet shampoo can truly cleanse the scalp, as believed by the dermatologist.
Source: Secondary and Published data.