Baking soda shampoo has become a popular DIY alternative for people who want a simple, inexpensive, and chemical-free approach to hair care. Supporters say it can remove buildup, refresh an oily scalp, and leave hair feeling lighter. However, it must be used correctly and sparingly, because baking soda is very alkaline and can be harsh on hair if overused.
Here’s how to make it safely, when you might want to try it, and when you should avoid it.
What Is Baking Soda Shampoo?
Baking soda shampoo is a homemade cleanser made by dissolving sodium bicarbonate (baking soda) in water. It acts as a clarifying wash that helps lift oils, residue from styling products, and hard-water minerals.
Unlike traditional shampoos, baking soda does not contain detergents (surfactants), fragrances, or preservatives. Its cleansing effect comes from its gritty texture and alkaline pH.
How to Make Baking Soda Shampoo
Ingredients
- 1 tablespoon baking soda
- 1 cup warm water
- Optional: a few drops of essential oil (lavender, tea tree, rosemary) for scent
Instructions
- Combine the baking soda and warm water in a squeeze bottle or jar.
- Stir or shake until completely dissolved. The mixture should look like clear water.
- Apply to wet hair, focusing on the roots and scalp.
- Massage gently for 30–60 seconds.
- Rinse thoroughly with warm water.
- Follow with an acidic rinse (optional but recommended):
- Mix 1–2 tablespoons of apple cider vinegar with 1 cup of water.
- Pour over hair, avoid the eyes, and rinse after 1 minute.
How Often to Use
- Only once every 1–2 weeks as a clarifying wash.
Using it too often can weaken the hair shaft or irritate the scalp because baking soda is much more alkaline than hair’s natural pH.
Why People Use Baking Soda Shampoo
1. Removes Product Buildup
Hairspray, dry shampoo, gels, and silicone-based products can leave residue on the scalp. Baking soda helps break down this buildup quickly.
2. Acts as a Powerful Clarifier
Hard-water minerals (like calcium and magnesium) stick to the hair. Baking soda can help remove these deposits, making hair feel cleaner.
3. Natural and Minimal Ingredients
People who want to avoid synthetic fragrances, preservatives, foaming agents, or allergens may prefer a DIY option.
4. Can Temporarily Improve Volume
By removing oils and residue, baking soda can leave the roots feeling lifted and airy.
But Is Baking Soda Shampoo Safe? (Important!)
Baking soda has a high pH of about 9, while healthy hair sits between 4.5 and 5.5. This means it can:
- raise the hair cuticle
- cause dryness
- lead to frizz
- weaken hair over time
If used sparingly (not daily or weekly), most people tolerate it well as an occasional clarifier. But it’s not ideal for color-treated, very dry, or curly/coily hair, which relies heavily on moisture and a low pH.
Who Should Use Baking Soda Shampoo?
It may work well occasionally for:
✔ people with oily scalps
✔ those using lots of styling products
✔ swimmers (to remove chlorine buildup)
✔ people in hard-water areas who need deep cleansing
✔ anyone wanting a gentle, fragrance-free clarifier
Who Should Avoid It or Use With Caution
⚠ People with:
- color-treated or chemically processed hair
- dry or damaged hair
- curly or coily hair
- scalp conditions that cause sensitivity or irritation
These hair types are more vulnerable to damage from high-pH products.
Best Alternatives to Baking Soda Shampoo
If you want clarifying power without the high alkalinity, try:
1. Apple Cider Vinegar Rinse
Helps balance pH, reduce buildup, and add shine.
2. Sulfate-Free Clarifying Shampoo
Gentler on scalp and hair; many are fragrance-free.
3. Rhassoul or Bentonite Clay
Natural clays cleanse without over-stripping.
4. Aloe Vera Gel + Water
A mild, soothing cleanser for sensitive scalps.
Final Thoughts
Baking soda shampoo can be a simple and effective way to remove buildup and refresh the scalp—when used sparingly and correctly. It’s not meant for everyday washing, nor is it ideal for all hair types. Combining it with an acidic rinse like apple-cider vinegar helps restore hair’s natural balance and reduce dryness.
Used wisely, this DIY method can be a helpful tool in your hair-care routine. But if your hair is easily damaged or color-treated, a gentler clarifying option may be a better choice.
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General Health Magazine 