# OSEA Hyaluronic Sea Serum for mature skin

**Lovi Fit: High fit for mature skin.**
Normal Skin Fit: High · Effectiveness: Average · Safety: Excellent.

Page: https://lovi.care/skincare/p/osea/hyaluronic-sea-serum/for/mature-skin

The Lovi Fit is the same in every country; only the stores and prices differ, and the ones here are for the United States.

Brand: [OSEA](https://lovi.care/skincare/brands/osea)
Category: [Moisturizers and moisturizing serums](https://lovi.care/skincare/best/moisturizers)

This fit is calculated for the concerns frequently associated with mature skin: fine lines, wrinkles, and loss of firmness. For scores based on a full skin profile (12D face scan, goals, preferences), use the Lovi app.

One of the best moisturizers for mature skin.

## Why this fit

- Suitable for normal skin due to the humectant action of sodium hyaluronate and barrier repair from Gigartina Skottsbergii Extract, though these benefits are not directly targeted at your primary concern of wrinkles and fine lines.
- The inclusion of Macrocystis Pyrifera Extract offers general skincare benefits, supporting overall skin health for your normal skin type.
- The product is safe for your normal skin, with no risks of irritation due to the absence of harsh ingredients and the presence of soothing extracts.

## Fit by skin type

- [Oily skin](https://lovi.care/skincare/p/osea/hyaluronic-sea-serum/for/oily-skin): Average
- [Dry skin](https://lovi.care/skincare/p/osea/hyaluronic-sea-serum/for/dry-skin): High
- [Combination skin](https://lovi.care/skincare/p/osea/hyaluronic-sea-serum/for/combination-skin): Average
- [Sensitive skin](https://lovi.care/skincare/p/osea/hyaluronic-sea-serum/for/sensitive-skin): High
- [Acne-prone skin](https://lovi.care/skincare/p/osea/hyaluronic-sea-serum/for/acne-prone-skin): High
- [Skin with dark spots](https://lovi.care/skincare/p/osea/hyaluronic-sea-serum/for/dark-spots): Average
- [Mature skin](https://lovi.care/skincare/p/osea/hyaluronic-sea-serum/for/mature-skin): High (this page)
- [Dry sensitive skin](https://lovi.care/skincare/p/osea/hyaluronic-sea-serum/for/dry-sensitive-skin): High
- [Oily acne-prone skin](https://lovi.care/skincare/p/osea/hyaluronic-sea-serum/for/oily-acne-prone-skin): High

## Key ingredients

Sodium Hyaluronate, Marine Extracts, Gigartina Skottsbergii Extract, Macrocystis Pyrifera Extract

## What the research says

- κ-carrageenan tetrasaccharide treatment protects against particulate matter-induced oxidative stress, inflammation, and skin barrier dysfunction in human HaCaT keratinocytes by chelating metal ions and modulating STAT3, PI3K/AKT, and PPAR-γ pathways. ([International Journal of Biological Macromolecules, 2025](https://pubmed.ncbi.nlm.nih.gov/39880261/))
- Hyaluronic acid extracts are safe and efficacious products for skin repair when used in tissue regeneration alone or in combination with herbal or Western medicine. ([Journal of Pharmacy & Pharmaceutical Sciences, 2015](https://pubmed.ncbi.nlm.nih.gov/25877441/))
- Macrocystis pyrifera ferment-containing creams decrease visible inflammation and signs of aging while enhancing barrier resilience and recovery. ([Journal of Cosmetic Dermatology, 2023](https://pubmed.ncbi.nlm.nih.gov/38041526/))
- A skincare regimen containing Macrocystis pyrifera ferment consisting of a cleansing foam, a serum, and a moisturizer decreases the visible effects of inflammation and aging while promoting healing and improving patient satisfaction. ([Journal of Cosmetic Dermatology, 2024](https://pubmed.ncbi.nlm.nih.gov/38922798/))
- Topical application of 0.1% hyaluronic acid formulations of different molecular weights led to significant improvements in skin hydration and elasticity, with low-molecular-weight formulations also significantly reducing wrinkle depth in seventy-six female subjects compared to a vehicle control. ([Journal of Drugs in Dermatology, 2011](https://pubmed.ncbi.nlm.nih.gov/22052267/))
- Topical application of hyaluronic acid in conjunction with free gingival graft significantly reduced donor site postoperative pain until day 7 compared to normal saline, with no significant differences in graft dimensions or patient satisfaction. ([Clinical Oral Investigations, 2022](https://pubmed.ncbi.nlm.nih.gov/34623507/))
- Treatment with a hyaluronic acid-containing mouth rinse or topical gel led to significant lesion reduction, pain relief, and normalization of lesion color in adult patients with minor recurrent aphthous stomatitis, with the gel formulation showing an earlier healing onset at 3 days. ([BMC Oral Health, 2019](https://pubmed.ncbi.nlm.nih.gov/31311529/))
- Topical sunscreen formulations containing UV filters, red algae extract, Ginkgo biloba, and vitamins protected hairless mice from UV-induced erythema, reduced transepidermal water loss, and significantly decreased the expression of p53 and caspase-3 compared to untreated controls. ([Journal of Photochemistry and Photobiology. B, Biology, 2015](https://pubmed.ncbi.nlm.nih.gov/26402714/))
- Chitosan/polyvinyl alcohol nanofibrous dressings containing 3% Corallina officinalis extract exhibited bead-free morphology, enhanced mechanical strength, strong antibacterial activity against Escherichia coli and Staphylococcus aureus, and excellent biocompatibility for skin cell survival and proliferation. ([Journal of Biomaterials Science. Polymer Edition, 2026](https://pubmed.ncbi.nlm.nih.gov/40742752/))
- Aqueous extracts from Macrocystis pyrifera and Durvillaea antarctica exhibited antiviral activity against acyclovir-sensitive and acyclovir-resistant HSV-1 and HSV-2, and topical formulations significantly reduced the severity and duration of HSV-1 skin lesions in an animal model compared to mock treatment and acyclovir. ([Frontiers in Microbiology, 2020](https://pubmed.ncbi.nlm.nih.gov/33013743/))
- Extracts of Laminaria digitata and Vernonia sublutea inhibit cutaneous neurogenic inflammation by reducing substance P secretion in an in vitro coculture model of porcine sensory neurons and keratinocytes. ([Experimental Dermatology, 2010](https://pubmed.ncbi.nlm.nih.gov/20849537/))
- Macrocystis pyrifera lipids inhibited cytokine-induced pro-inflammatory signaling and barrier dysfunction in human keratinocyte models. ([International Journal of Molecular Sciences, 2023](https://pubmed.ncbi.nlm.nih.gov/38003573/))

## What reviewers say

Based on a very large amount of data, this hydrating treatment is highly effective for individuals seeking deep hydration and anti-aging benefits, particularly those with dry, sensitive, or aging skin. Users consistently report a plumper, smoother complexion and a reduction in fine lines. Some users note that the premium price point and specific packaging design may be drawbacks.

- Liked: Deeply hydrating (mostly mentioned)
- Liked: Lightweight/Non-sticky (often mentioned)
- Liked: Plumps fine lines (often mentioned)
- Disliked: Expensive price point (often mentioned)
- Liked: Sensitive-skin friendly (sometimes noted)
- Disliked: Packaging issues (sometimes noted)
- Disliked: Unpleasant scent (rarely noted)

## How to apply

- Use your moisturizer twice a day in your AM and PM routines. Apply it daily to help smooth fine lines.
- Apply this product after your toner and serum, but before your SPF in the morning. Follow your cleanser and toner steps to keep your skin balanced.
- Gently press a small amount into your face and neck. Avoid rubbing the skin too harshly to prevent extra tension.
- Apply the moisturizer on slightly damp skin to help lock in extra moisture. Clean skin helps the product absorb much more evenly.
- Avoid the sensitive eye area during application. Do a quick patch test before your very first use to stay safe.
- Video: https://storage.pora.ai/2f72f5d69f07beeafc30237f829efbff.mp4

## Questions and answers

### What makes OSEA Hyaluronic Sea Serum a great fit for mature skin?

OSEA Hyaluronic Sea Serum is a great fit for mature skin because sodium hyaluronate draws in moisture to keep skin soft and plump. Marine extracts like Gigartina Skottsbergii and Macrocystis Pyrifera help repair the skin barrier and support overall health without causing irritation.
Sources: [International Journal of Biological Macromolecules, 2025](https://pubmed.ncbi.nlm.nih.gov/39880261/)

### Which ingredients make this serum a good fit for mature skin?

Sodium hyaluronate and Gigartina Skottsbergii extract make this serum a good fit because they draw moisture into the skin and help repair the skin barrier. Macrocystis Pyrifera Extract also supports overall skin health and helps keep skin looking smooth and resilient.
Sources: [International Journal of Biological Macromolecules, 2025](https://pubmed.ncbi.nlm.nih.gov/39880261/)

### What does Hyaluronic Acid do for mature skin?

Hyaluronic acid helps mature skin by deeply boosting moisture, improving elasticity, and smoothing the appearance of fine lines and wrinkles. Regular use keeps the skin looking plump and soft while supporting overall firmness and hydration.
Sources: [Journal of Drugs in Dermatology, 2011](https://pubmed.ncbi.nlm.nih.gov/22052267/), [Skin Research and Technology, 2024](https://pubmed.ncbi.nlm.nih.gov/38591218/)

### What does Marine Extract do for mature skin?

Marine extract helps improve mature skin by reducing roughness and fine lines while keeping your skin soft and deeply moisturized. It works to support firmer, healthier skin quality over time.
Sources: [Journal of Cosmetic Dermatology, 2023](https://pubmed.ncbi.nlm.nih.gov/35426243/), [Marine Drugs, 2026](https://pubmed.ncbi.nlm.nih.gov/42042209/)

### Where does this serum go in a skincare routine for mature skin?

This serum goes in the evening routine, as treatments with active ingredients are placed then for simplicity and extra safety around sun exposure. It fits into the routine after cleansing and toning, and right before your moisturizer.

### Can I use it with retinol, and in what order?

You can use this moisturizing treatment alongside retinol to help keep your skin comfortable and smooth. Apply the serum first to clean skin to draw in moisture, and follow with your retinol once it is fully absorbed.
Sources: [Cutis, 2006](https://pubmed.ncbi.nlm.nih.gov/17121065/)

### How often should I use this serum?

Use this serum in the evening as part of your routine for mature skin. Applying it daily helps keep your skin hydrated and supports overall skin health with a very low risk of irritation.
Sources: [Health Science Reports, 2021](https://pubmed.ncbi.nlm.nih.gov/34141902/), [Journal of Drugs in Dermatology, 2015](https://pubmed.ncbi.nlm.nih.gov/26151786/)

### Can it clog pores, cause breakouts or purging for mature skin?

OSEA Hyaluronic Sea Serum is unlikely to clog pores or cause breakouts on mature skin, as it is free of heavy, pore-clogging ingredients. Its lightweight soothing extracts and hydrating sodium hyaluronate help keep skin calm and balanced without triggering irritation.

### Can I use this serum around the eyes or on my body?

Yes, you can use this serum around the eyes and on your body as a moisturizing treatment. Its gentle ingredients, like sodium hyaluronate and marine extracts, help keep dry skin soft and smooth without causing irritation.
Sources: [Polymers, 2023](https://pubmed.ncbi.nlm.nih.gov/37896378/)

### Is it fragrance-free and alcohol-free?

Yes, it has no fragrance and no drying alcohol.

## Alternatives for mature skin

- [COSRX Hydrium Triple Hyaluronic Moisture Ampoule](https://lovi.care/skincare/p/cosrx/hydrium-triple-hyaluronic-moisture-ampoule/for/mature-skin) — Average fit — $19.99 at Amazon
- [Torriden DIVE-IN Low Molecular Hyaluronic Acid Serum](https://lovi.care/skincare/p/torriden/dive-in-low-molecular-hyaluronic-acid-serum/for/mature-skin) — Average fit — $22.25 at Amazon
- [MEDI-PEEL Peptide 9 Volume White Cica All-in-one Essence](https://lovi.care/skincare/p/medi-peel/peptide-9-volume-white-cica-all-in-one-essence/for/mature-skin) — Average fit — $24.40 at Amazon

## Pairs well with

- Cleanser: [Fresh Soy Face Cleanser](https://lovi.care/skincare/p/fresh/soy-face-cleanser/for/mature-skin) — Superior fit — $28.08 at Amazon
- Hydrating Toner: [COSRX Propolis Synergy Toner](https://lovi.care/skincare/p/cosrx/full-fit-propolis-synergy-toner/for/mature-skin) — Superior fit — $17.00 at Amazon
- SPF: [ISDIN Eryfotona Actinica SPF 50+](https://lovi.care/skincare/p/isdin/eryfotona-actinica-spf-50/for/mature-skin) — Superior fit — $46.00 at Amazon

## Where to buy

No store in United States has a checked price for this product, so the page shows none.

## Ingredients

Water, Gigartina Skottsbergii Extract, Macrocystis Pyrifera Extract, Undaria Pinnatifida Extract, Sodium Hyaluronate, Potassium Sorbate, Citric Acid, Lonicera Caprifolium Extract, Lonicera Japonica Extract, Chlorophyll
## About the Lovi Fit

Lovi: Unbiased, science-based skincare AI trained on real user outcomes.

Lovi calculates every fit score from the full ingredient list with brand-independent rules its dermatologists and cosmetic chemists build and review, and personalizes every pick with AI trained on the real results of millions of users. Lovi trains its fit score models on a proprietary dataset built from more than 10,000 expert-labeled products and more than 100,000 simulated examples, following an internally consistent methodology presented at Cosmoprof, AMWC, and Skin of Color Update. Levels from best to worst: Superior, High, Average, Low, Caution, Warning.

Behind this fit score: Nadia Kapleva, MS (Co-founder, Medical Director); Alexey Shagraev, PhD (Co-founder, CEO and CTO); Dr. Sofía Perea Pérez, MD, MSc (Medical Board); Aishani Shah, MD (Medical Board); Asya Zubkova, MS (Medical Board); Hanna Kurets, MD (Medical Board, Medical Advisor); Elina Nazarenko, MD (Medical Board); Victoria Derkova, MS (Medical Board).

Page built Nov 8, 2026.

More from Lovi: https://lovi.care/skincare/llms.txt

## This page in other countries

- United States: https://lovi.care/skincare/p/osea/hyaluronic-sea-serum/for/mature-skin (this page)
- United Kingdom: https://lovi.care/skincare/uk/p/osea/hyaluronic-sea-serum/for/mature-skin
- Ireland: https://lovi.care/skincare/ie/p/osea/hyaluronic-sea-serum/for/mature-skin
- Germany: https://lovi.care/skincare/de/p/osea/hyaluronic-sea-serum/for/mature-skin
- France: https://lovi.care/skincare/fr/p/osea/hyaluronic-sea-serum/for/mature-skin
- Italy: https://lovi.care/skincare/it/p/osea/hyaluronic-sea-serum/for/mature-skin
- Netherlands: https://lovi.care/skincare/nl/p/osea/hyaluronic-sea-serum/for/mature-skin
- Spain: https://lovi.care/skincare/es/p/osea/hyaluronic-sea-serum/for/mature-skin
- Canada: https://lovi.care/skincare/ca/p/osea/hyaluronic-sea-serum/for/mature-skin
- Australia: https://lovi.care/skincare/au/p/osea/hyaluronic-sea-serum/for/mature-skin
- Singapore: https://lovi.care/skincare/sg/p/osea/hyaluronic-sea-serum/for/mature-skin
- Saudi Arabia: https://lovi.care/skincare/sa/p/osea/hyaluronic-sea-serum/for/mature-skin
- United Arab Emirates: https://lovi.care/skincare/ae/p/osea/hyaluronic-sea-serum/for/mature-skin