Overview
What it is
Serum with 3 ingredients that contains hyaluronic acid
Cool Features
It is fungal acne (malassezia) safe and reef safe
Suited For
It has ingredients that are good for anti aging and dry skin
Free From
It doesn't contain any harsh alcohols, common allergens, fragrances, oils, parabens, silicones or sulfates
Fun facts
Eres Tu is from South Korea.
We independently verify ingredients and our claims are backed by peer-reviewed research. Does this product need an update? Let us know.
Warning: Incomplete INCI list
This happens when the brand does not publicly disclose the full list of ingredients.
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Key Ingredients
Benefits
Ingredients Explained
Sodium Hyaluronate is the salt form of hyaluronic acid. It is a long sugar chain that is naturally found in your skin, joints, and connective tissue that maintains hydration and elasticity.
In skincare, it works as a humectant. It pulls water from the environment and deeper layers of skin and binds it to the surface.
Interestingly, the size of the molecule affects its behavior:
Some clinical evidence links low molecular weight versions to improved wrinkle depth, elasticity, anti-inflammatory effects, and barrier repair.
Many serums use a blend of both weights so you can get surface hydration plus longer-lasting and deeper effects.
You'll typically see concentrations between 0.1-2% for this ingredient.
Learn more about Sodium Hyaluronate1,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse.Â
It is a:
- Humectant, drawing moisture into the skin
- Emollient, helping to soften skin
- Solvent, dispersing and stabilizing formulas
- Preservative booster, enhancing the antimicrobial activity of other preservativesÂ
Sodium DNA is an emerging anti-aging ingredient.
It is created by taking deoxyribonucleic acid (DNA) and purifying it with sodium hydroxide.
The DNA is extracted from several different animal sources, including: calf thymus, the gonadic tissue of a male sturgeon, or herring / salmon sperm.
You have probably seen this ingredient in anti-aging skincare. But what is it?
DNA is composed of nucleotides, or chemical building blocks. Nucleotides include adenine (A), thymine (T), guanine (G), and cytosine (C). Talk about a flashback to biology! Nucleosides are formed from these nucleotides.
The science behind Sodium DNA is based on an ingredient called Polydeoxyribonucleotide or PDRN.
PDRN are DNA fragments mainly extracted from the sperm cells of trout or salmon. Meaning, PDRN can be derived from Sodium DNA.
PDRN consists of chains of nucleotides and nucleosides mentioned above. They can range anywhere from 80 - 2000 pairs.
Studies show PDRN has the following properties:
Most of the research on PDRN has been done using injectable forms. That’s important, because PDRN is a large molecule and doesn’t absorb well through the skin. So if you’re applying it topically, the effects are likely to be much milder.
Still, topical Sodium DNA is emerging as a trendy anti-aging ingredient. It’s generally well-tolerated and offers good biocompatibility with human skin, making it a low-risk addition to most routines.
Further studies are needed to truly confirm this ingredients anti-aging ability (Remember, retinol has decades of research!).
Sodium DNA may be sourced from fish, animal tissue, or plants. Since this isn’t always disclosed, we recommend asking the brand directly if the ingredient’s origin is important to you.
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Where it's from
Eres Tu is a Korean brand
We're dedicated to providing you with the most up-to-date and science-backed ingredient info out there.
The data we've presented on this page has been verified by a member of the SkinSort Team.
Read more about us· Updated January 16, 2026 • Added by sonyarm
