The Science Behind Dry Shampoo

Dry shampoo is one of those super convenient beauty tools we really couldn’t imagine living without, especially since it comes in handy on all those dirty ‘do days, when our locks need a well-deserved break. But while a bit of your go-to formula can instantly save you from a bad hair day, most of us are probably stumped when it comes to understanding how dry shampoo actually works.

Now, you don’t exactly have to be a scientist to understand that dry shampoo combats oiliness with absorbent products, but it’s more than helpful to know what exactly goes inside your trusty powders. That way you can find the product that works best for you.

“Dry shampoo formulas contains silica, which is an absorbent fine powder,” says Alterna Product Development Director, Catherine DeCeglie, via email. “When the powder is applied onto a wet, oily or dirty surface, it absorbs anything on the surface — similar to a sponge. Once those little sponges absorb the oils and dirt, they become heavier and can be brushed out, leaving a refreshed surface behind.”

To find your best dry shampoo match, let’s break down everything you need to know about your favorite formulas. Here’s exactly how dry shampoo works according to science.

1. What’s Inside Your Formula

Dry shampoo formulas, which generally come either in spray or powder form, work to sop up the hair’s superficial grease, making your tresses look and smell fresh and matte. But to really understand what makes dry shampoo unique, it’s important to understand your formula’s ingredients, as brands utilize different components to ensure refreshed-feeling strands.

First comes active ingredients like aluminum starch and silica, which mop up any moisture and oily films that cover the hair. Dr. Zasloff states that the particles of starch act both like little sponges and scouring pads, working to absorb the grease and oil prevalent on your roots.

“When the shampoo is first put onto the hair, the starch particles act as sponges,” adds Dr. Zasloff. “When the starch is brushed out, they act as scouring pads, being swept across the surface of the hair shafts.”

2. Ingredients To Avoid

But while oil-absorbing ingredients help to keep your hair matte and oil-free, some ingredients can have some precautions to keep in mind. Talc and aluminum starch octenylsuccinate for example, are often avoided by health-conscious consumers, being that they’ve been linked to harmful health conditions. However, not all dry shampoo formulas use such ingredients, as some brands use natural rice starches instead.

“While these ingredients are not harmful to your hair or general health, many health-conscious consumers lean away from these ingredients in their beauty routines,” says Heather Coughlin, Director of Product Development for Amika, through email. The alternative is rice extract and or starches.

3. Where To Start

It’s true that there are many dry shampoo formulas on the market, but aerosol sprays tend to be the most popular,  but are not necessarily the best., they can tackle greasiness on the spot, but can be way overdone very easily. But while spray-and-go formulas can conveniently work in seconds, sometimes the application part gets tricky. A simple shaker of powder can be controlled.  Just sprinkle it on, rub in, and wait a few moments, and brush it out. (Or leave in overnight)

Coughlin recommends brushing your formula throughout the hair, to ensure that your formula is evenly distributed. But if you really want to take your dry shampoo game to the next level, sprinkle some dry shampoo formula onto your hair before bedtime, as it will leave your hair fresh and voluminous the next morning.

“For an added benefit, apply dry shampoo at night before going to bed,” Coughlin adds. “Incorporating dry shampoo into your nighttime regime beats oil to the punch, and guarantees voluminous and fresh strands in the morning.”

4. How Much To Apply

There are many dry shampoo formulas to choose from, but a successful application is more about “how much” than “which one.” “If you have fine hair, you will only need a light sprinkle of dry shampoo to soak up excess and amp-up the texture and volume,” Nick Arrojo, founder of Arrojo Studio, says through email. “Conversely, anyone with thick or coarse hair will need to use a much heavier application.”

In addition, Arrojo tells me curly and straight hair types differ greatly when it comes to dry shampoo application. Curly hair types in particular should be extra cautious when using dry shampoo products.

“Those with naturally curly texture should apply the product differently to those with straight hair,” Arrojo says. “Straight and regular hair types can apply lots of dry shampoo into the roots and shake and tousle the hair, but curly hair types need to be much more judicious with their application. On curly hair, dry shampoo can expand the shape too much, making it too wild and out of control.”

5. How Often To Use

Dry shampoo fans have a tendency to overuse the product, relying on it most days a week to keep their hair looking fresh. Bad idea, apparently.

Tina Hedges, Founder of LOLIBeauty, finds that overuse of aerosol sprays can clog hair follicles, and disrupt the balance of a healthy scalp. In addition, Dr. Zasloff adds that too much use of starch and silica based formulas can wear away at the surface of the hair shaft, causing breakage you won’t want to deal with.

“The grittiness of the starch and silica physically wears away the surface of the hair shaft,” says Dr. Zasloff. “Using this option on a regular basis can damage your hair, wearing it away until it becomes fragile and breaks.”

In order to keep your hair safe, stick to dry shampoo just a couple days a week, and never apply more than you can brush out easily.

Drugstore dry shampoos are easy to find, but homemade dry shampoos can be a good alternative if you’re not about chemicals.

To make your own dry shampoo, Hedges recommends using a powdery base, like a mix of arrowroot and yucca. Then, add in some drops of essential oils for a pleasant aroma. However, keep in mind that there is no set rule book on how to make your own formula, especially since Hedges says there are many ingredient combinations you can try out.

“Feel free to mix and match ingredients to meet your own specific needs,” Hedges explains via email. “Let’s say you have dark brown hair, you can add in a bit of cocoa or clove powder to blend with your hair color. Or maybe you have an itchy, flaky scalp, you can add in a few drops of rosemary, thyme and chamomile essential oil.”

We suggest using one of our shampoos regularly, only using a dry shampoo occasionally.

Call us here at Private Label Skincare Florida to get what we consider a great formula for any type of hair.

To schedule a call with our product specialist, please fill out the brief form below and let us know when it would be best to give you a call.

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