Sea Water (Maris Aqua) in Skincare

2026-08-19

Official US ocean-science reference. Average salinity about 35 parts per thousand, so roughly 3.5 percent of seawater's weight is dissolved salts; chloride and sodium together are around 85 percent of all dissolved ions, and magnesium and sulfate a further 10 percent. It describes seawater in the ocean, not a processed cosmetic raw material.

2025-10-26 · PMID 41311774 · PMCID PMC12648452 · DOI 10.7759/cureus.95450

Systematic review of ten studies — four randomized controlled trials and six observational studies — covering immersion in natural seawater, Dead Sea climatotherapy, thermal spring bathing, salt bathing combined with ultraviolet phototherapy, and creams enriched with Dead Sea mineral preparations. The authors report heterogeneity in sample size, protocol and outcome measures, few randomized trials, and that formal meta-analysis was not possible. Every intervention is a supervised procedure or a mineral-enriched clinical preparation, not an ordinary retail cosmetic naming sea water. Its title names a medical condition; that is the source's wording, not a claim made by this guide.

2005-02 · PMID 15689218 · DOI 10.1111/j.1365-4632.2005.02079.x

Controlled forearm study. One forearm was submerged for 15 minutes in a 5 percent Dead Sea salt solution enriched with magnesium chloride while the contralateral forearm sat in tap water, with measurements at baseline and weeks 1 to 6. Barrier and hydration measures improved on the salt side. The material was a concentrated salt bath, not sea water, and the exposure was immersion, not a leave-on cosmetic. Cited here to mark that boundary, not to support a sea-water claim.

2016 · PMID 28105060 · PMCID PMC5221345 · DOI 10.1155/2016/6520475

Narrative review defining deep sea water as seawater pumped from below 200 metres and describing it as cold, low in organic contamination and comparatively mineral-rich. It states that the potential health benefits of its applications in clinical studies are not widely established, that most supporting work used animal models, and that more clinical study is warranted. Its skin-related findings concerned consumption rather than topical application.

2026-08-19

Official brand collection page for the line most associated with deep sea water in this catalog. Reviewed 2026-08-19: it describes the line as powered by deep sea water and names Ulleungdo deep sea water as an ingredient, but states no collection depth on the page itself. Third-party retailer listings quote a depth figure and do not agree with each other, so this guide asserts no depth. Cited as brand wording, not as a specification.

2021-08-10

Dermatologist home-use test method: apply the complete product to a small area twice daily for seven to ten days; test rinse-off products for their instructed contact time; wash off and stop for a reaction; formal patch testing may be needed.

2026-08-19

Official US consumer guidance that cosmetics can provoke allergic reactions, labels should be read, known triggers avoided, and healthcare advice sought for a suspected allergy. It also says US law has no federal standard or definition governing terms such as hypoallergenic or for sensitive skin.

2026-08-19

Official US boundary between cosmetic appearance and function claims and drug claims; supports avoiding disease, structure/function and medical language for a sea-water cosmetic.

2026-08-19

Official US cosmetic ingredient-declaration rules, including that ingredients present at 1 percent or less may be listed without descending order. Ingredient order is not a concentration, processing, sourcing or efficacy certificate.

2026-08-19

FDA directs pregnant consumers with concerns about a cosmetic product or ingredient to their healthcare provider; it does not provide a universal safety verdict for any sea-water formula.

2026-08-19

Official consumer guidance to read and follow the complete label, avoid assuming natural means safer, stop after an unexpected reaction, and contact a healthcare provider.