Seatheory Ltd

SeaTheory Limited is a science‑driven, eco‑conscious brand that creates sustainable, clean and vegan hair‑care solutions. Drawing on the evolutionary power of marine algae harvested by hand from the Irish Atlantic, the company formulates high‑efficacy supplements and topicals that support healthy hair growth, protect against environmental stress and counter the effects of hair ageing.

The core of SeaTheory’s range is the proprietary Maragen™ marine complex – a vegan, plant‑based bioactive extracted from sustainably cultivated macro‑algae. This is combined with potent hero ingredients such as hyaluronic acid, squalane, vegan omegas, botanical lipids and a suite of hair‑specific vitamins and micronutrients. Their product line includes luxury, sulphate‑, oil‑ and silicone‑free topicals as well as the Hair Health supplement, enriched with biotin, zinc, selenium, L‑cysteine and vitamins C and D to nourish the follicle from within. All formulations are cruelty‑free, dermatologically tested and packaged with a zero‑waste, plastic‑free ethos.

SeaTheory’s commitment to circularity and carbon‑positive practices underpins every step of its supply chain – from seaweed farming and clean bioprocessing to green‑chemistry formulation – delivering a transparent, high