Sea Water

Sea Water is used mainly as a solvent/mineral source and can be present at meaningful levels in “marine” sprays and creams; its high salt content and mineral composition can be drying and stinging on compromised barriers (eczema, fissures, post-procedure skin). Clinically, hypertonic saline exposure is a known irritant on inflamed or broken skin and can exacerbate barrier disruption, so while many tolerate it on intact skin, reactive individuals can experience noticeable discomfort—warranting a mild irritancy score. Safety Notes: In mainstream skincare, Sea Water (often listed as Sea Water/Maris Aqua) is frequently used as a minor mineral/marketing component in emulsions, toners, and cleansers at ~0.1–5%. Many “marine” toners/mists and gel/serum bases use it as a significant portion of the water phase (~10–60%) to deliver salts/trace minerals while managing stability and sensory. At the high end, consumer-available sea-water sprays and seawater baths can be essentially undiluted seawater (near 100%), with practical limits driven by salinity, corrosion, and irritation potential; this applies mainly to leave-on mists/sprays and rinse-off/bath products.