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Written by OSEA Staff | Last Updated on: March 3, 2026.
Hyaluronic acid (HA) is one of skincare’s most buzzed-about ingredients. We often associate it with plump, hydrated skin and look for it in our face and body serums and moisturizers. However, one area often left out of the hyaluronic acid conversation is lip care. Ahead, your complete guide to hyaluronic acid and why it holds the secret to more hydrated, plumper-looking lips.
What Is Hyaluronic Acid?
Hyaluronic acid is a naturally occurring polysaccharide found throughout the body, including the connective tissue, eyes and skin. HA is the molecule responsible for locking in moisture in the body’s tissues. As we age, we lose HA in our skin. This is part of why we start to see less volume and plumpness in our face as we mature—our skin loses its ability to retain moisture.
Just like the molecule found naturally in our skin, HA in topical products (skincare) is a humectant, meaning it can retain water and help prevent it from evaporating. It attracts water molecules to hydrate and plump skin, making it a go-to for healthy-looking skin and lips.
The Benefits of Hyaluronic Acid for Lips
Hyaluronic acid is the star ingredient used in injectable lip fillers, but it can have a plumping effect when applied topically as well. HA works like a tall glass of water, drawing moisture into the skin to keep your pout plump, smooth and hydrated. Lips are one of the most delicate areas of skin. They’re thinner and drier, making them more vulnerable and often overlooked in daily skincare rituals. Unlike the rest of your skin, lips lack a protective hydrolipidic barrier, making them more prone to dryness and volume loss over time¹. Other factors, like licking and biting your lips, not drinking enough water and cold weather, can also result in dryness. When you use lip products infused with hyaluronic acid, you can expect your lips to feel more hydrated, look smoother and appear plumper.
The Best Hyaluronic Acid Lip Treatments
Hyaluronic Lip Oil Booster
If you’re looking for an instant plumping effect and a glossy finish, our Hyaluronic Lip Oil Booster will get you there—in just one swipe. This juicy, non-sticky lip oil delivers the high-shine of a gloss with the nourishment of a balm, for a softer, plumper-looking pout. A combination of hyaluronic acid and sea fern, a type of nutrient-rich seaweed, helps promote visibly plumper, fuller-looking lips, while castor oil and meadowfoam oil nourish and condition.
Rich yet lusciously lightweight in texture, our lip oil features a deliciously sweet mango-mandarin scent that delights the senses. And the ultra-plush doe-foot applicator hugs lips, delivering the perfect amount of shine for a soft, supple look. Swipe on our Hyaluronic Lip Oil Booster day or night, or whenever your lips need a boost of instant plumping hydration. Our lip oil works so well that in a consumer study, 94% of participants agreed that they would use this instead of lip filler**.
Sea Results™ After Just One Swipe
Clinical Results After 1 Use*:
100% showed improvement in lip volume
100% showed improvement in hydration
91% showed improvement in lip plumping
Consumer Results After 1 Use**:
100% agreed lips have a luminous shine
100% agreed lips felt soft
94% agreed they would use this instead of lip filler
*Based on an independent third-party clinical study of 32 women.
**Based on an independent third-party consumer perception study of 34 women.
Dream Lip Mask with Bio-Retinol
Softer, smoother lips are just a sleep away with our Dream Lip Mask. This dreamy bio-retinol treatment is designed to act like a restorative cocoon, helping to lock in moisture while actively softening lips and smoothing lines overnight.
Our latest innovation isn’t just another nourishing, moisturizing overnight lip mask. This is age-defying skincare for your lips. Made with bio-retinol derived from the Bidens pilosa plant, along with passion fruit oil to moisturize, nourish and condition, the luxurious gel texture melts right in, cocooning lips in a luscious layer of moisture while you dream. The formula also features sodium hyaluronate—the water soluble salt form of hyaluronic acid—to help promote a more plumped look and visibly smooth lip lines.
The fresh passionfruit flavor is a sensorial delight, making it an indulgent addition to your nightly wellness routine. Although Dream Lip Mask with Bio-Retinol is intended for overnight use, you can also apply it during the day, whenever your lips need some extra-nourishing moisture.
Sea Results™ Immediately & by Morning
Clinical Results*
97% showed visible improvement in lip lines immediately
100% showed visible improvement in lip lines in 8 hours
Consumer Results**
100% agreed lips feel softer
97% agreed lips feel smoother
97% agreed it locks in moisture
94% agreed it replenishes dry lips & lips look less flaky
*Based on an independent third-party clinical study of 38 women.
**Based on an independent third-party consumer perception study of 35 women.
Sources:
1. O'Lenick, Siltech LLC, and Pappas (14 September 2017). Comparatively Speaking: Lips vs. Skin. Cosmetics and Toiletries. Retrieved October 2, 2025, from https://www.cosmeticsandtoiletries.com/research/literature-data/article/21836853/comparatively-speaking-lips-vs-skin