Corpus Christi · Deodorant
Chemistry AHA Serum Kosas Deodorant
Lower concern for PFAS, cosmetics rarely contain intentional forever chemicals, but brand transparency is absent.
This AHA serum deodorant from Corpus Christi appears to be a standard cosmetic formulation with no known PFAS triggers like water-resistant coatings or fluorinated active ingredients. The brand makes no PFAS claims one way or another.
Shop Corpus Christi on Amazon →Material
cosmetic serum/deodorant base (typical: water, glycerin, botanical extracts)
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
cosmetics is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
This product combines a cosmetic serum base (typically water, glycerin, botanical extracts) with deodorant actives, creating a liquid or gel format. The serum vehicle means higher water content and humectants compared to powder or stick deodorants, which reduces thermal stress on ingredients but requires preservatives to prevent microbial growth. No aluminum antiperspirant is typical for 'serum' positioning, which lowers the aluminum leaching concern present in traditional antiperspirants. Stability of botanical extracts in water-based formulas depends heavily on preservative system and storage conditions.
The brand's record and disclosure
Corpus Christi has no publicly documented safety recalls, certifications (organic, cruelty-free, etc.), or transparency statements on ingredient sourcing or preservative choices for this product. The brand does not appear on major third-party safety registries (EWG, Made Safe, Leaping Bunny) based on available records. No formal PFAS avoidance policy or disclosure has been found. This absence of communication is notable in a category where brands increasingly publish full ingredient breakdowns and third-party testing; silence limits assessment of actual risk.
How it compares in its category
Serum-based deodorants occupy a niche between conventional stick antiperspirants (higher aluminum risk) and natural powders (lower efficacy, faster replacement). This format is less regulated than antiperspirants and avoids the aluminum concern, placing it lower-risk than clinical-strength products. However, serum deodorants require more frequent reapplication and depend entirely on preservative safety for shelf stability. Comparable brands (like Youth to the People or Nécessaire) typically publish more detailed ingredient sourcing and third-party certifications, making Corpus Christi less transparent by category standard.
If you buy it
Store in a cool, dry place away from direct sunlight to preserve botanical extract integrity and prevent preservative degradation. Do not apply to broken or freshly shaved skin, as serum formulas may sting and allow preservatives or fragrances to penetrate more easily. Reapply 2-3 times daily as serum deodorants provide shorter protection than sticks. If any redness, itching, or sensitization occurs, discontinue and check the full ingredient list against known fragrance allergens or essential oils.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Preservative system (identity unknown)
Water-based serum formulas require preservatives to prevent bacterial and fungal growth; Corpus Christi does not publicly disclose which system is used. Common choices include parabens (endocrine concern, low risk at use levels) or formaldehyde releasers (e.g., DMDM hydantoin); absence of disclosure prevents targeted assessment.
Fragrance or essential oil allergens
Serum deodorants typically rely on fragrance or botanical extracts for scent and some antimicrobial effect. Without a published full ingredient list, specific allergens (limonene, linalool, etc.) cannot be identified; individuals with sensitive skin or fragrance intolerance face unknown risk.
Formaldehyde releasers
No evidence of formaldehyde releasers in cosmetic deodorants at typical use rates; however, some water-based preservative systems can release trace formaldehyde during storage. No reported instances for this brand, but lack of transparency prevents confirmation.
Heavy metals in botanical extracts
Serum deodorants often contain plant extracts (tea tree, witch hazel, sage) that can accumulate cadmium or lead if sourced from contaminated soil. No specific testing or recalls reported for Corpus Christi; risk depends on extract supplier vetting, which is undisclosed.
Contact dermatitis from serum base or actives
Glycerin and botanical extracts can irritate sensitive skin, especially under axillary conditions (occlusion, friction, heat). Frequency of application in serum format increases exposure; individuals with atopic dermatitis or eczema should patch-test first.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Deodorant
Tom's of Maine
Deodorant
mineral-based, baking soda formulation
Lower concern, mineral-based formula with public PFAS-free positioning, though no independent third-party verification.
⚠Risky category by default
Tom's of Maine
Most-Loved Deodorant Bundle
mineral-based and plant-derived actives; stick formulation
Lower-concern deodorant; mineral-based formula with PFAS-free claim aligns with brand ethos, but no third-party verification found.
⚠Risky category by default
Tom's of Maine
Antiperspirant Deodorant
mineral-based active ingredients, plant-derived botanicals, no synthetic water-repellent coatings
Lower PFAS concern, mineral-based formula with MADE SAFE cert; antiperspirant category has minimal waterproof-coating risk.
✓Verified PFAS-free by a third party
More deodorant grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.