How to DIY Baking Soda Shampoo for a Homemade Scalp Exfoliant
Tawni Bannister for Byrdie
Fact checked by Anna HarrisReviewed by Sky Kim
From over styling to sweaty gym sessions to missed hair wash days, our hair and scalp really gets put through the ringer. And, like with anything in life, all that stuff really adds up. So it's no surprise when hair feels lifeless or weighed down from a week's worth of living and, let's be honest, dry shampoo. These are the times when normal shampoo just won't cut it. But would you believe that the secret to that much-needed detox is baking soda? The natural clarifying agent deep cleans the hair by gently removing buildup and giving you that squeaky-clean feeling you're longing for. But before you go washing your hair with baking soda, there are a few things to keep in mind. We tapped the experts to get some answers.
Meet the Expert
Brendan Camp, MD, is a double board-certified dermatologist based in New York.
Philip B is a hair and scalp expert as well as the founder of his own eponymous haircare line.
The Benefits of Washing Hair With Baking Soda
Using baking soda shampoo has many benefits. For one, baking soda contains no parabens, sodium lauryl sulfate, diethanolamine, dyes, or fragrances like many shampoos on the market. Instead, it is made of a single, all-natural ingredient: sodium bicarbonate. "Baking soda is a basic substance that can neutralize acids, which is why it is useful for eliminating odors," says Camp. "Additionally, it can dissolve dirt and oil residue, and is a gentle abrasive that can act as an exfoliant." Unlike some hair products that leave a filmy buildup on the hair, baking soda clarifies and helps to keep your hair free of dandruff. And the best part? It's insanely affordable—a 16-ounce box costs less than a dollar.
How to Make Baking Soda Shampoo at Home
What You'll Need
Box of baking soda
Water
A bowl or recycled shampoo bottle
Essential oil (optional)
Apple cider vinegar rinse
The Steps
Pour one part baking soda into a bowl.
Mix in three to four parts water. (You can experiment to see what mixture and consistency you like best.)
If using essential oils for fragrance, add a few drops to the bowl.
To use in the shower, wet your hair completely, turn off the water, and gently apply the baking soda mixture from root to tip.
Let sit for one minute before rinsing it out with water.
Finish with an apple cider vinegar rinse to try to restore the pH balance of your hair and scalp and to add shine to your strands.
When to Use Baking Soda Shampoo
Both experts agree that baking soda shouldn't be used as a daily shampoo. "Baking soda has a pH of 8.1, making it slightly alkaline," says Philip B. "Ideally, hair should be 5.5 to be its best (think smooth, soft, glossy, bouncy, and shiny)—anything above is alkaline opening the cuticle, anything below is acidic." This means that while using baking soda as a shampoo can open the cuticle and strip the hair, it shouldn't be part of your everyday routine as it can be highly abrasive.
If you're looking to adjust colored hair, Philip B says that baking soda can be used as a "hair color scrub." "It should remain granular during use so it will help to open the hair cuticle, get to the cortex, and work like a scrub in the area where color pigments are stored," he explains. "The physical granular invasion will allow for some color to be released or stripped out of the hair, so if you are looking to eliminate a bit of color, this is an option."
Is Baking Soda Shampoo Safe for All Hair Types and Textures?
Philip B recommends steering clear of baking soda if your hair skews dry. "It may leave both hair and scalp super dehydrated, dry, dull, and will make color fade out," he warns. "For dry hair, or someone with a build-up of sebum, products, summer beach residue, sweat, or sunscreen, I would first recommend they reach for a clarifying shampoo with key fatty acids of coconut, avocado, or a peppermint avocado scrub—this can, in fact, double as a cleanser without damage."
And if your hair is limp, baking soda may offer up some benefits. Philip B notes that it can be used as the "grit" for someone who has super fine, limp hair that's looking to build up body, volume, and texture along with more versatility to hold styling in place. "It will basically function to stack the hair strands and make the hair more coarse, which is a better base for some hairstyles," he says.
Finally, Philip B says that for naturally curly hair, a clarifying product (versus baking soda) works best for "hair that is usually composed of more layers—sometimes twice as many layers. It also has a smaller diameter than other textures along with weaker internal bonds," he explains. "The combination of weaker bonds and more layers can lead to excessive damage, dryness, breaking, and stripping, so baking soda is usually not recommended."
Potential Side Effects of Baking Soda Shampoo
Those with sensitive or severely dry scalp should be weary of baking soda, as it can be too harsh and put you at risk of over-stripping the hair. Also, Camp doesn't recommend using baking soda for people with telogen effluvium (a condition characterized by excessive hair shedding) or those with an active infection or inflammatory skin disorder (such as psoriasis or eczema).
Byrdie Tip
When applying to the scalp, scrub the mixture using gentle, light pressure, as the abrasive texture of the baking soda can cause irritation.
Alternatives to Baking Soda Shampoo
While making your own baking soda shampoo may be easy on the budget, it may not be suitable for those of us lacking in either time or DIY skills. Baking soda works because it is a natural clarifying agent, but a commercial clarifying cleanser or treatment can be just as effective. Keep in mind that, as with baking soda shampoo, any clarifying products should only be used occasionally.
The Final Takeaway
While baking soda shouldn't serve as a replacement for your everyday shampoo, it can be an effective weekly treatment or a natural alternative on days your hair calls for a deeper clean. Before diving in, consider your hair type and texture as baking soda can be a little too drying if overdone.