Crystal Review, Is Crystal Non-Toxic?
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
Across 9 graded products, Crystal averages Excellent (86/100). On disclosure, the brand says nothing publicly about PFAS. 9 of its products grade Good or better. Grades are model-based estimates, not lab results.
Does Crystal have PFAS, by category
Worth buying from Crystal Good or better, safest first
Crystal
Deodorant Stick
mineral salts (potassium alum complex), water-based
Heavy metals
Potassium alum is mined and processed; while regulatory food-grade alum is tightly…
Skin sensitization or irritation
Isolated reports of irritation in consumers with damaged skin barrier or severe aluminum…
Lower concern; mineral-salt deodorant with no known PFAS triggers.
⚠Risky category by default
Crystal
Mineral Deodorant Roll On
mineral salts (potassium alum or ammonium alum)
Fragrance allergens and sensitizers
Crystal mineral deodorants typically contain botanical extracts or synthetic fragrance to…
Systemic alum absorption (chronic exposure)
Potassium or ammonium alum can be absorbed through skin over time. Evidence of harm from…
Lower concern; mineral salt deodorants are intrinsically unlikely to contain PFAS.
⚠Risky category by default
Crystal
Body Deodorant
mineral salts (potassium alum, sodium chloride)
Heavy metals
Potassium alum can carry trace contaminants (lead, cadmium) depending on mining and…
Skin irritation from salt contact
Mineral salts can cause dryness, stinging, or irritation in individuals with sensitive or…
Lower concern; mineral salt base aligns with PFAS-free claim.
⚠Risky category by default
Crystal
Quest Water Filter Pitcher
Activated carbon filter cartridge; polypropylene pitcher housing
Bacterial growth in filter cartridge
Any activated carbon pitcher can harbor bacteria if cartridges are not replaced on…
Activated carbon dust or fines in filtered water
New carbon cartridges can shed fine particles if not rinsed before use. Filterlogic does…
Plastic off-gassing or odor
Polypropylene pitchers may emit a faint plastic odor when new, particularly in warm…
Lower concern product with no known PFAS signals, but brand silent.
⚠Brand says nothing about PFAS
Crystal
Body Deodorant Travel Stick
mineral salt (sodium chloride) in cardboard/paper stick
Lead
Mineral salt deposits can naturally contain trace heavy metals depending on geological…
Skin irritation from salt contact on sensitive or abraded skin
Sodium chloride is mildly irritating to mucous membranes and abraded skin. Users with…
Bacterial growth or contamination in cardboard packaging
Cardboard tubes exposed to moisture (humid bathrooms, water splash) can harbor mold or…
Fragrance allergens (if scented variant)
If the travel stick includes fragrance or essential oils, undisclosed fragrance…
Lower PFAS concern; mineral salt format has minimal typical exposure pathways.
⚠Risky category by default
Crystal
Salt of the Earth Classic Crystal Deodorant
Natural mineral crystals (potassium alum or ammonium alum)
Aluminum absorption potential
Potassium alum and ammonium alum are not aluminum chlorohydrate complexes and present…
Skin irritation or sensitization
Alum can cause irritation in individuals with sensitive skin, compromised skin barrier…
Lower PFAS concern; mineral crystal deodorants lack typical PFAS-prone coatings.
⚠Risky category by default
Crystal
Aluna Stick Deodorant
mineral salts (potassium alum or ammonium alum); no synthetic coating
Lead
Potassium and ammonium alum are mined minerals and can contain trace heavy metal…
Skin irritation or allergic contact dermatitis
Pure mineral salt deodorants are generally well-tolerated, but occasional contact…
Fragrance allergens (if scented variant)
If the product contains added fragrance oils or essential oils, these can trigger contact…
Lower concern; mineral salt deodorants rarely use PFAS.
⚠Risky category by default
Crystal
Thai Deodorant Stone
mineral (alum-based rock/salt)
Aluminum absorption via skin
Potassium alum is a source of bioavailable aluminum. Absorption through intact skin is…
Skin irritation and contact dermatitis
While alum is generally well-tolerated, some users report localized irritation, stinging…
Bacterial or mold growth on stone
If stored in damp conditions or shared among users, the porous mineral surface can harbor…
Fragrance allergens (if scented variant)
Crystal produces both unscented and scented versions. Scented variants may contain…
Lower PFAS concern; naturally derived mineral product with no known PFAS applications.
⚠Risky category by default
Crystal
Body Deodorant Spray
mineral salts (potassium alum compounds)
Inhalation of spray particles (propellant/alcohol mist)
The spray format creates an inhalation route for fine alum particles and alcohol vapors.…
Fragrance allergens and skin sensitization
Crystal Body Deodorant Spray contains fragrance compounds, which are not individually…
Alcohol content irritation
Spray deodorants typically contain 10-30% ethanol or isopropanol as a carrier. This can…
Lower concern; mineral deodorant is a PFAS-low product category.
⚠Risky category by default
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