ROUND LAB
Birch Moisturizing SerumArencia
Holy Hyssop Serum 30A serum built around Hyaluronic acid and Vitamin C, for hydration and barrier repair.
A serum built around Niacinamide and Hyaluronic acid, for hydration and barrier repair.
Brand price
USD 26.35 · checked 25 Sept 2026 · brand's site
Brand price
USD 24.00 · checked 26 Sept 2026 · brand's site
At a Glance
They come out differently on Silicone-free and Cruelty-free; those rows are shaded. Tap any answer to see why.
Key Ingredients
Hyaluronic acid2
Hyaluronic acid and its salts; a humectant that binds water to the skin.
Vitamin C derivative (stable)3
Stable derivatives of ascorbic acid.
3-O-Ethyl Ascorbic Acid, Ascorbyl Glucoside, Sodium Ascorbyl Phosphate
Benefits
Hydrating12
Boosts hydration and relieves dry, tight skin.
Beta-Glucan, Butylene Glycol, Caprylic/Capric Triglyceride, Dipotassium Glycyrrhizate, Fructooligosaccharides, Glycerin, Glyceryl Glucoside, Hyaluronic Acid, Hydrolyzed Hyaluronic Acid, Polyglycerin-3, Sodium Hyaluronate, Tocopherol
Barrier Repair7
Strengthens and restores the skin's natural barrier.
Aloe Barbadensis Flower Extract, Avena Sativa Kernel Extract, Caprylic/Capric Triglyceride, Cyclohexasiloxane, Glycerin, Laminaria Japonica Extract, Tocopherol
Reduces Irritation3
Eases discomfort and supports skin resilience.
Avena Sativa Kernel Extract, Beta-Glucan, Dipotassium Glycyrrhizate
Hydrating12
Boosts hydration and relieves dry, tight skin.
Butylene Glycol, Ceramide NP, Glycerin, Glyceryl Acrylate/Acrylic Acid Copolymer, Hyaluronic Acid, Hydrolyzed Hyaluronic Acid, Panthenol, Propanediol, Sodium Acetylated Hyaluronate, Sodium Hyaluronate, Sodium Hyaluronate Crosspolymer, Tocopherol
Barrier Repair5
Strengthens and restores the skin's natural barrier.
Concerns
May Worsen Seborrheic Dermatitis1
May feed the yeast involved in seborrheic dermatitis.
May Worsen Seborrheic Dermatitis5
May feed the yeast involved in seborrheic dermatitis.
Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Ceramide NP, Glycosphingolipids, Hydrogenated Lecithin, Sodium Acetylated Hyaluronate
Ingredients Side-by-side
Water (in both products)
Skin Conditioning
1,2-Hexanediol (in both products)
Skin Conditioning
Betula Platyphylla Japonica Juice
Skin Conditioning
Humectant
Hydrolyzed Hyaluronic Acid (in both products)
Humectant
Water (in both products)
Skin Conditioning
1,2-Hexanediol (in both products)
Skin Conditioning
Smoothing
0 / —
- Niacinamide
- Acne Fighting
- Barrier Repair
- Brightening
- Dark Spots
- Even Tone
- Oil Control
- Pore Refining
- Redness Reducing
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion Stabilising
- Fatty esters (glyceryl stearate, PEG-100 stearate)
- May Worsen Seborrheic Dermatitis
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Water
Antiplaque, Skin Conditioning, Solvent
Aqua (EU),Deionized Water,Distilled Water,Micromatrix Fractile AN,Onsen-Sui (JPN),Purified Water
Learn more about Water →Methylpropanediol
Solvent
2-Methyl-1,3-propanediol
Learn more about Methylpropanediol →Glycerin
Denaturant, Fragrance, Hair Conditioning, Humectant, Oral Care, Perfuming, Humectant, Skin Protecting, Solvent, Viscosity Controlling
Glycerin may be plant, synthetic or animal depending on the supplier.
Learn more about Glycerin →1,2-Hexanediol
Skin Conditioning, Solvent
We don't have a description for 1,2-Hexanediol yet.
Learn more about 1,2-Hexanediol →Sodium Hyaluronate
Humectant, Skin Conditioning
Sodium Hyaluronate is a hyaluronic acid.
Learn more about Sodium Hyaluronate →Hydrolyzed Hyaluronic Acid
Hair Conditioning, Humectant, Skin Conditioning
Hydrolyzed Hyaluronic Acid is the hydrolysate of Hyaluronic Acid derived by acid, enzyme or other method of hydrolysis
Learn more about Hydrolyzed Hyaluronic Acid →Butylene Glycol
Fragrance, Humectant, Skin Conditioning, Solvent, Viscosity Controlling
Butane-1,3-diol (CAS No. 107-88-0/ EC No. 203-529-7) (R)-(-)-butane-1,3-diol” (CAS No. 6290-03-5/ EC No. 228-532-0)
Learn more about Butylene Glycol →Hyaluronic Acid
Antistatic, Humectant, Moisturising, Skin Conditioning
Hyaluronic Acid is a hyaluronic acid.
Learn more about Hyaluronic Acid →Ascorbic Acid
Antioxidant, Buffering, Fragrance, Skin Conditioning
Ascorbic Acid is L-ascorbic acid.
Learn more about Ascorbic Acid →Hydrogenated Lecithin
Skin Conditioning, Emulsifying
Hydrogenated Lecithin isn't fungal acne safe.
Learn more about Hydrogenated Lecithin →
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