DIVE-IN Low Molecular Hyaluronic Acid Serum

Water, Butylene Glycol, Glycerin, Dipropylene Glycol, 1,2-Hexanediol, Panthenol, Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid (500ppm), Sodium Acetylated Hyaluronate, Sodium Hyaluronate Crosspolymer, Hydrolyzed Sodium Hyaluronate, Allantoin, Trehalose, Betaine, Propanediol, Portulaca Oleracea Extract, Hamamelis Virginiana (Witch Hazel) Extract, Madecassoside, Madecassic Acid, Ceramide NP, Beta-Glucan, Malachite Extract, Cholesterol, Pentylene Glycol Glyceryl Acrylate/Acrylic Acid Copolymer, PVM/MA Copolymer, Polyglyceryl-10 Laurate, Xanthan Gum, Tromethamine, Carbomer, Ethylhexylglycerin, Scutellaria Baicalensis Root Extract, Paeonia Suffruticosa Root Extract

The useful anchor point here is that Hydrolyzed Hyaluronic Acid is disclosed at 500ppm (0.05%) at position 8. Since INCI is descending order, that tells us everything above it — Butylene Glycol, Glycerin, DPG, Hexanediol, Panthenol, Sodium Hyaluronate — sits above 0.05%, and everything below it (positions 9 onward) is at or under 0.05%. That's most of the ingredient list, including three more "HA" variants, Allantoin, Trehalose, Betaine, all four botanical extracts, Madecassoside/Madecassic Acid, Ceramide NP, Beta-Glucan, and Malachite Extract.

Practically: the real actives doing work are Panthenol and Sodium Hyaluronate, dosed at conventional levels. The "5D Hyaluronic Acid" positioning (5 HA types) is the headline claim, but only 2 of the 5 are meaningfully dosed — the other 3 are splitting a sub-0.05% allotment between them.

• Panthenol, Sodium Hyaluronate — Worth having. Positioned above the 0.05% marker, dosed at functional levels. LMW/multi-weight HA has real mechanistic support: Raman spectroscopy work shows HA in the 20–300 kDa range does penetrate the stratum corneum, unlike high-MW HA which sits on the surface confirmed by skin permeation differing by molecular weight, with low molecular weight HA passing through the stratum corneum. A 2024–2025 scoping review of the 2003–2023 literature backs LMW-HA's penetration and safety profile broadly across preclinical and clinical studies on hydration, wound healing, and anti-aging applications. Solid, if not a dramatic-effect ingredient. 
• Sodium Acetylated Hyaluronate, Sodium Hyaluronate Crosspolymer, Hydrolyzed Sodium Hyaluronate — Gimmick. Each is sub-0.05%, splitting a fraction of a fraction. The "5-molecular-weight" claim is technically true and functionally overstated.
• Allantoin, Trehalose, Betaine — Unremarkable but fine. Well-established humectants/soothers, standard inclusion, no controversy either way.
• Fragrance free.