The Ordinary Marine Hyaluronics (Discontinued)
The Ordinary Marine Hyaluronics is a uniquely lightweight, water-based serum designed to deliver intense hydration without the heavy or tacky feel often associated with traditional hyaluronic acid. Instead of relying solely on sodium hyaluronate, this formula utilizes marine-derived water reservoirs, including exopolysaccharides from skin-friendly marine bacteria and various algae extracts. Key beneficial ingredients like Glycerin and Pseudoalteromonas Ferment Extract work together to attract and hold moisture within the skin, supporting a healthy moisture barrier. The texture is exceptionally fluid—almost like water—making it an ideal layering piece for those who prefer weightless skincare. While it was a favorite for its fast absorption and hydrating capabilities, the presence of certain marine-sourced ingredients requires a closer look for those with specific skin concerns. Although this specific version has been discontinued, its formulation serves as a benchmark for marine-based hydration, offering a refreshing alternative to thicker serums for users seeking a minimalist, breathable finish.
Our Analysis
Our analysis of The Ordinary Marine Hyaluronics reveals a Moderate comedogenic risk, primarily due to the inclusion of Algae Extract. While algae is often praised for its mineral content, it carries a high comedogenic rating of 5/5. This is because many algae species are rich in iodides, which can irritate the pore lining and trigger a process called 'retention hyperkeratosis.' This irritation leads to inflammation and the formation of micro-comedones, making it a hidden trigger for breakouts. Even though the serum is oil-free and feels light, the biochemical nature of the algae can be problematic for congestion-prone individuals.
Skin Type Recommendations
This serum is best suited for dry or mature skin types that do not struggle with acne. We recommend that those with oily, combination, or acne-prone skin avoid this product due to the high-risk Algae Extract. Sensitive skin types should also exercise caution, as the iodides may cause folliculitis-like irritation.
Flagged Ingredients
Rich in iodides which irritate the pore lining, triggering inflammation and micro-comedones.
Want Deeper Analysis?
Run our MACR (Multi-Axis Comedogenic Risk) analysis to get a comprehensive 5-axis risk assessment. This AI-powered analysis evaluates ingredients for Plugging Risk, Barrier Damage, Fungal Acne Risk, Oxidation Risk, and real-world User Reports — giving you personalized scores for your skin type.
