Undaria Algae Body Butter
Low PFAS risk. Natural cosmetic formulation, no applied water or stain treatments.
Body butter made from seaweed extract and natural butters with no obvious PFAS-bearing coatings or treatments. No brand PFAS disclosure available, but formulation type suggests lower concern.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Marine algae extract, butters, oils
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What Undaria Algae Body Butter is made of, ingredients and materials
Undaria Algae Body Butter is formulated around Undaria pinnatifida (a brown kelp) extract combined with plant-derived butters and oils. This is a water-in-oil emulsion typical of premium cosmetic butters, with no synthetic coatings or treatments applied to the algae itself. The absence of silicones, waxes, or polymer thickeners reduces concern for microplastic or non-biodegradable accumulation. Osea positions this as a clean beauty product, which aligns with the ingredient transparency expected in this category.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Iodine content in seaweed
Undaria pinnatifida naturally accumulates iodine from seawater. Individuals with iodine sensitivity, hyperthyroidism, or pre-existing thyroid conditions should patch-test or consult a healthcare provider before regular body application, though dermal absorption is minimal compared to ingestion.
Heavy metals
Seaweed species can bioaccumulate trace metals (cadmium, arsenic, lead) depending on water source. No published test data available for Osea's specific Undaria sourcing or metal screening. Topical absorption of metals through intact skin is negligible, but Osea's sourcing transparency on this point is not documented in public records.
Source, FDA ↗Oil oxidation and rancidity
Unsaturated fats in plant butters and oils can oxidize if exposed to heat or light, producing free radicals and potentially irritating oxidized lipid byproducts. Proper storage (cool, dark, sealed) mitigates this; signs of rancidity (off-odor, separation) warrant replacement.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Fragrance allergens (synthetic or essential oil-derived)
No specific fragrance allergen alerts on record for Osea's Undaria line. If the product contains essential oils or natural fragrance extracts, standard cosmetic allergen disclosure should be reviewed on the label; contact dermatitis risk is low but not zero for sensitive individuals.
Formaldehyde / VOCs
No formaldehyde-releasing preservatives (e.g., DMDM hydantoin, imidazolidinyl urea) have been identified in Osea's published ingredient list for this product. Modern clean beauty brands typically avoid these, but full preservative system details are not always disclosed.
Source, ATSDR ↗How is this PFAS grade calculated?
The brand's record and disclosure
Osea maintains a clean beauty positioning and lists ingredients openly, though the brand does not publish third-party certifications (e.g., NSF, EWG Verified) for this specific product. No recalls or established safety controversies on record for this product line. The brand's PFAS stance is not publicly detailed, but the formulation contains no aqueous film-forming substances or water-resistant coatings that would introduce PFAS, lowering applied risk in this category.
How it compares in its category
Marine algae body butters are less common than plant oil or shea butter alternatives, positioning Undaria as a differentiated choice rather than a commodity product. Most conventional body butters carry no hazard alerts; Osea's clean ingredient list places it in the lower-concern tier of the body care category. Unlike conventional fragranced butters, which may contain undisclosed synthetic fragrances or allergens, Osea typically relies on natural essential oils and extract scent, reducing fragrance allergen risk.
If you buy it
Store in a cool place away from direct sunlight to prevent oxidation of oils and preserve algae extract potency. Discontinue use if skin irritation, redness, or allergic reaction occurs, particularly if you have iodine sensitivity (seaweed products contain naturally elevated iodine). Because it is an emulsion, separation or texture changes over time are normal and do not indicate spoilage if the product has been stored properly. Replace if rancid odor develops, typically 12-18 months after opening depending on storage conditions.
What is not known about PFAS in this product?
- Basis
- Model estimate, 82% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Osea has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to Undaria Algae Body Butter?
- Plant oils, butters, waxes
- We found no PFAS statement from the brand
- Fragrance allergens
2 hazards checked on this product, all on its full breakdown.
- Water, oils, glycerin, botanical extracts
- The brand calls it PFAS-free, which we have not verified
- Fragrance allergens (botanical extracts)
3 hazards checked on this product, all on its full breakdown.
More moisturizer 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.