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Jane Feddersen

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In this Article

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About the Author

Jane Feddersen

Jane is a former DI student-athlete and lifelong health enthusiast. Since graduating from College of Charleston where she played both indoor & beach volleyball, Jane’s spent the last four years building her marketing career with experience in project and partner management. Outside of work, her nutrition certification, dog, travel and yoga flows keep her busy.

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Geologie Co-Wash Review: Should You Try It? We Found Out

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Jane Feddersen

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Rating: 4.7 / 5

Most people use shampoo for their entire lives without ever questioning if it’s good for their hair or scalp. I know I’ve spent most of my life searching for the best price and scent, but as it turns out, most shampoo contains pretty terrible ingredients for both your scalp and your hair, from harmful sulfates to ones that lead to chemical buildup on your scalp. 


Geologie Co-wash is a new “Anti-Shampoo” that claims to clean your hair without any of the risks that traditional shampoos pose to your hair and scalp. But does it really work? Is there actually any difference? Or is this just marketing? We found out!


TLDR: Cutting to the chase

After trying out both of Geologie’s Co-Wash products, we have identified some pros and cons compared to traditional shampoos.


Geologie Co-Wash Pros and Cons


  • Top-tier formula🥼: Dermatologist-tested that naturally moderates oil production, rebuilds hair structure, and moisturizes scalp & hair


  • Less harmful☁️: Hair-and-scalp-friendly that is better for you than traditional shampoos with no detergents, sulfates, parabens, or chemical buildup


  • Better hair days: Consistently provides soft & smooth, frizz-free, manageable hair for all skin and hair types (including colored hair!)


  • Save money💰: Replaces your usual 2-step process and extends time between washes


  • Environmentally friendly🌱: Vegan and cruelty-free product with ecological packaging that creates less waste


  • Discounts: Geologie’s subscription plan saves you 10% or more 


  • No free shipping: all of Geologie’s shipments cost $4.95 – no matter how much you’re ordering (another reason to bundle and save 😉)

Keep reading to learn: 

  • What Geologie Co-Wash is
  • How it differs from traditional shampoos and alternatives
  • The benefits of using it
  • Whether or not it lives up to its claims


We got to try both their Smoothing & Cooling formulas


Best shampoo alternatives: Geologie Co-Wash vs Formulate vs Prose 

Geologie isn’t the only company on the market making safe shampoo alternatives. To help you make an informed decision about which product is best for you, here’s the info comparing Geologie to top competitors, Formulate and Prose. 

Best alternatives to shampoos
TypeCo-WashPersonalized shampoo Custom shampoo
Price1-pack: $38/ea

2-pack: $57 ($28.50/ea)

3-pack: $75.99 ($25.33/ea)

Subscription: $34.20/mo
$19 for 4oz each

$39 for 8oz set

$49 for 14oz set
Single purchase: $28.00

Subscribe: $23.80/mo
Quanitity 8 fl oz ($3.17-$3.50/oz)4-14 fl oz ($3.50-$4.75/oz)8.5oz ($2.80-$3.29/oz)
Best forMoisturizing hair & scalp

Moderating oil production

Smooth, frizz-free hair
Damaged hair

The need for an extremely personalized formula
Unique hair needs
Subscription available?
Sulfate/paraben-free?🟡 Depending on formula
Free shipping?
Ships toInternationallyUS OnlyUS Only

Geologie Co-Wash overview: Skincare for your scalp 

Geologie is a company that’s been making waves in the Men’s Care (skin, hair, body, and more) community, offering products that are less harmful and more personalized than traditional ones. The ingredients are based on years of research and innovative, dermatologist-designed formulas to produce incredible results. If you’re looking for products and routines that can take your self-care to the next level, you’re in the right place.


Geologie’s product lineup includes: 


Their newest product line, Hair Co-Wash, or “the silent shampoo killer,” is a haircare game-changer unlike any traditional shampoo you’ve ever used. It cleanses hair, leaves natural moisture, and nourishes your scalp with good-for-you, dermatologist-approved ingredients. 



What’s wrong with traditional shampoo? 

As we get older, the makeup of our hair can change, along with the texture and thickness. You may have noticed these changes, but that could also be from years of using the wrong products. Here are some of the shortcomings of traditional shampoos:


    • Sulfates: Many traditional shampoos contain harsh sulfates and chemicals that strip hair of natural oils, leaving it dry and brittle. This can lead to a vicious cycle of chemical build-up and our scalp overproducing oil, resulting in greasy hair and dandruff.
    • Scalp irritation: Not only do sulfate shampoos strip your hair of its natural oils, but they also have the potential to irritate sensitive skin. Many people find that switching from traditional shampoo to a more natural alternative helps ease itchiness, irritation, redness, or other symptoms associated with sensitive skin or eczema.
    • Parabens & preservatives: Most commercial shampoos also contain parabens as preservatives, which are known to be harmful to the human body and can sometimes trigger allergic reactions. 
    • Not suitable for colored hair: Many of the chemicals in shampoos don’t pair well with hair treatments and coloring, so if you’re using the wrong products daily, you’re doing yourself a disservice and wasting money. 
    • Hair frizz: The fact that you need to use shampoo multiple times a week can make all of these problems add up and leave you with frizzy hair that doesn’t look very healthy or attractive.




Why is co-washing better?

Co-washing, or co-wash, is when you use conditioner to cleanse your hair, with no lather or shampoo necessary. This can result in natural oil production, repaired hair, and extended time between washes. 


While that might sound like the opposite of what you need to wash your hair (hence, “Anti-Shampoo”), co-washing has many benefits over traditional shampooing. Unlike shampooing, which strips natural oils from the scalp and hair, co-washing leaves you with nourished hair that does not get dried out or greasy as quickly.


Geologie’s Co-Wash is one of the best on the market and provides several benefits compared to classic shampoo and conditioner combos.


Benefits of Co-Washing


Oftentimes, we forget that the scalp should receive the same love and care as your face skin. Co-Wash is formulated to nourish not only your hair but the skin underneath it, too. The formula avoids stripping the skin of essential oils and keeps the hair hydrated and moisturized, so it’s a great option for those with curly hair or those who shampoo their hair more often.

No harsh chemicals or sulfates

Co-Wash is free of sulfates, detergents, parabens, phthalates, PFO/PFAs, and SLS/SLEs, which makes it gentler on the hair. This is especially beneficial for those with fine hair, as it’s susceptible to damage and dryness.


Color-safe and effective on all skin and hair types

Some of the harsh chemicals and strong detergents that we’ve mentioned can lead to fading of color and breakage over time. Co-Wash cleanses the hair with a mild conditioner that leaves it looking healthy, hydrated, and vibrant, so it’s even better for those who color.

Extends time between washes

If you have oily hair, you might be inclined to shampoo every day (or more!) to keep your hair clean. Co-Wash allows you to extend the time between washes, saving you money in the long run and preventing excessive scalp drying.



Geologie’s Hair Co-Wash Review: Smoothing vs Cooling

The co-washing technique also involves using friction + a scrubbing motion (instead of lathering) to remove dirt and grime, getting your hair clean and healthy without damaging it in the process. 


But which co-wash should you choose? Well, that’s a matter of personal preference – we tried out both Geologie’s Smoothing and Cooling Co-Wash and can confidently recommend both after multiple uses.

Hair Co-Wash: Smoothing

Who it’s for: People with drier scalps. Ideal for thick, wavy, or curly hair


Key ingredients: Avocado oil, coconut oil, Vitamin B5, Squalane


How to use: Apply to wet hair and then massage into your scalp for a full minute. Massaging + water activates the ingredients, promoting growth and frizz-free follicles. Rinse thoroughly to enjoy cleaner, healthier hair than shampoo can provide.

Hair Co-Wash: Cooling

Who it’s for: People with oily hair and scalps. Ideal for thin or fine hair.


Key ingredients: Tea tree oil, menthol, Vitamin B5, Aloe vera, squalane

How to use: Same as the Smoothing application 🙂 The Cooling formula’s ingredients also offer a light, refreshing, tingly scalp treatment. Always be sure to rinse your hair thoroughly after application to avoid product buildup.

I can honestly tell the difference after 1 week of washes with the Smoothing formula


Our experience with Geologie’s Co-Wash products

I didn’t think I needed to change up my hair care routine, but after a few washes with Geologie’s Smoothing Co-Wash, I was wowed. 


First, I loved their environmentally sustainable packaging. The sack of hair wash was weird, I’ll admit… but after considering the number of plastic bottles that I’d thrown out over the years, this made so much more sense. Not to mention that getting all the product out (vs smacking the bottle against my hand or storing it upside down for multiple washes) was so much easier.


I loved the coconut scent, and after just a week of washes, I clearly noticed that my hair was much less frizzy than it’d ever been, and this was without the 5-6 pumps of conditioner that I usually need after shampooing. My waves were much more pronounced, and I noticed that I could wait a full extra day before it started looking greasy again!





Can co-wash replace your daily shampoo and conditioner? 

Geologie’s Co-Wash options are designed to replace both your shampoo and conditioner. The active ingredients deep clean while moisturizing without stripping your scalp’s natural oils. 


Moreover, Geologie Co-Wash products are perfect for the following situations: 

  • Textured, thick, wavy, or curly hair types (Smoothing formula is recommended)
  • Thin, fine, or oily hair types (Cooling formula is recommended)
  • Damaged (heat-styled, bleached, colored) hair 
  • Sleek hairstyles or a slicked-back look 
  • Cleansing beards, too! 



The Verdict – Is Geologie Hair Co-Wash worth it? 

If you’re struggling with un-tamable or hard-to-manage hair that seems to have changed texture or gotten oilier over time, Geologie Co-Wash products might be the alternative you’ve been looking for. 


Co-Wash is safer and more conducive to healthy hair, and you’ll actually save money in the long run with more time between washes and only one product vs two. The scent is amazing, and I definitely noticed a difference after just a few washes. And the cherry on top – their sustainable packaging was easier for me to get every drop of the product, and is better for our environment.


So, whether you’re trying to fix damaged hair, want to break away from harmful shampoos and conditioners, or you’re hoping to improve your scalp and hair health, Geologie Co-Wash products come highly recommended from us.




Geologie FAQs: What to know before getting started

Geologie ships to most international destinations, but shipping times are a bit quicker in North America.

Geologie only offers refunds on products that have been damaged or are defective. Check out their website for more information, but unfortunately, Geologie does not currently offer any sort of money-back guarantee because their hair and skin care products are personal and hygienic in nature.

Geologie Co-Wash products are available either as a one-time purchase or as a subscription. 



Total price

Price per Co-Wash










Once-a-month subscription


$34.20 (10% off)



Have you tried Geologie’s Co-Wash or any other co-washing products? We’d love to hear about your experience in the comments below!

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About the Author

Jane Feddersen

Jane is a former DI student-athlete and lifelong health enthusiast. Since graduating from College of Charleston where she played both indoor & beach volleyball, Jane’s spent the last four years building her marketing career with experience in project and partner management. Outside of work, her nutrition certification, dog, travel and yoga flows keep her busy.

Learn more
Jane Feddersen

Jane Feddersen

Jane is a former DI student-athlete and lifelong health enthusiast. Since graduating from College of Charleston where she played both indoor & beach volleyball, Jane’s spent the last four years building her marketing career with experience in project and partner management. Outside of work, her nutrition certification, dog, travel and yoga flows keep her busy.

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