What we love
- You want the simplest possible ingredient list: this stick contains exactly one published ingredient, with no fragrance, baking soda, or fillers
- You or your teen have reacted to baking soda or fragranced deodorants and need a gentle, unscented option
- You are on a budget: at $1.72 per ounce one stone costs a fraction of most natural sticks and can last months
- You understand potassium alum is an aluminum salt and are comfortable with how it differs from antiperspirant aluminum
Worth knowing
- You are avoiding aluminum in every form: potassium alum, the only ingredient here, is an aluminum compound
- Anyone using it has an aluminum contact allergy, since the salt sits directly on the skin
- You only buy products audited by an outside certifier such as EWG Verified or MADE SAFE; this one has none
- You need an antiperspirant: this stone controls odor but does nothing to reduce sweating
Key Specs
Ingredients
Potassium Alum (mineral salt), the only ingredient
Aluminum Compounds
Potassium alum (an aluminum salt)
Fragrance
Fragrance-free
Baking Soda
None






