Apparently most shampoo bars aren't CGM approved (because of the soapification process) but I've had the most success using nothing but a shampoo bar made of bentonite clay and coconut oil :
14 Shampoo Bars That Are a Win-Win For Your Hair and Your Carbon Footprint | Vogue
10 Best Shampoo Bars of 2023 for All Hair Types
The Pros & Cons of Shampoo Bars | NaturallyCurly.com
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The 10 Best Shampoo Bars
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The 6 Best Shampoo Bars of 2023, Tested and Reviewed
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The 10 Best Shampoo Bars
Amazon.com : JessEmet Rice Water Shampoo Bar - Fermented Rice Water for Hair Growth Moisturizing best for dry, damaged hair, Curly, and Frizzy Hair, pH balanced, Sulfate-free, Eco Friendly, Vegan, Zero waste.… :
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The 9 Best Shampoo Bars for Travelers of 2023
LOVE Shampoo Bar - Davines
9 best eco-friendly shampoo bars for 2023, tested
12 Best Shampoo Bars to Lighten 2021's Environmental Load | Vanity Fair
Amazon.com : Ethique Sweet & Spicy - Volumizing Solid Shampoo Bar for Fine, Flat, Limp Hair - Vegan, Eco-Friendly, Plastic-Free, Cruelty-Free, 3.88 oz (Pack of 1) : Beauty & Personal Care
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The 7 Best Shampoo Bars of 2023, Tested and Reviewed
7 Best Shampoo Bars For Curly Hair | Shampoo for curly hair, Best shampoo bars, Color shampoo
Tested and Reviewed: The Best Shampoo Bars for Every Hair Type | Condé Nast Traveler
Tested and Reviewed: The Best Shampoo Bars for Every Hair Type | Condé Nast Traveler
This Ethique Shampoo Bar Comes in Compostable Packaging | Wirecutter
KinKind Review: The Best Shampoo Bars For Curly… | pebble magazine
The Best Shampoo and Conditioner Bars for Curly Hair | Bars Over Bottles
Shampoo Bars and Solid Shampoo ✓ Ethique
Tested and Reviewed: The Best Shampoo Bars for Every Hair Type | Condé Nast Traveler
Top 5 Best Shampoo Bars for Colored Hair
13 Best Shampoo Bars 2023 for Every Hair Texture & Color: Kitsch, Briogeo, Ethique | Allure
Best shampoo bars 2023 UK - tested by the GHI
25 Best Gentle Shampoos for Curly Hair | NaturallyCurly.com
Good Juju Dry Hair Shampoo Bar | Award-Winning | Up To 75 Washes – Good Juju Body & Home
20 Best Shampoo Bars & Conditioner Bars 2023 | Eco-Friendly Hair Care | Trusted Since 1922
