Crystal Deodorant Stick
Biork Crystal Deodorant is a plastic-free, natural deodorant made from potassium alum, housed in a biodegradable cork container. It's unscented and hypoallergenic.
How scores are calculated
Materials (40%): How plastic-free the product is — raw materials, construction, and coatings.
Packaging (20%): Is the product packaged in plastic? Is it recyclable?
Transparency (20%): Does the brand disclose ingredients, sourcing, and manufacturing?
Durability (20%): How long does it last? Longer-lasting products reduce plastic waste over time.
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Last updated: April 4, 2026
Excellent plastic-free packaging (cork), natural mineral salt as the active ingredient, and certifications for natural cosmetics. Addresses concerns about aluminum chlorohydrate by using potassium alum.
Why We Recommend This Product
Biork's Crystal Deodorant Stick is made from 100% natural potassium alum in a cork container. Fragrance-free, aluminum chlorohydrate-free.. Certifications: Cosmos Natural Cosmetics Certified, Vegan, Cruelty-Free.
Chemical & Health Analysis
Each chemical of concern is broken down below — what it is, where it comes from in this product, what it does to the body, and who is most at risk.
Various plastic chemicals
Biork Crystal Deodorant Stick
Contains potassium alum (a type of aluminum salt), though considered safer than aluminum chlorohydrate.
All health claims are based on published, peer-reviewed research from the NIH, WHO, IARC, and peer-reviewed journals. This information is for educational purposes and does not constitute medical advice.
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