Benton's Deep Green Tea line has a clear hierarchy that the ingredient lists give away if you read them side by side. The toner leads with green tea at 53%, an unapologetic showpiece for the Boseong leaf. The serum tells a different story: green tea leaf water drops to 35,000ppm — still a meaningful 3.5%, still the base — but the moment you scan down the list, the real headline appears as three hyaluronic acids stacked consecutively. Sodium hyaluronate, hydrolyzed sodium hyaluronate, and hyaluronic acid itself, followed by biosaccharide gum. That's the tell. This isn't a green tea serum with hydration as a bonus; it's a hydration serum built on a green tea base, and understanding that ordering is the key to using it well.
The logic of three molecular weights is sound and not just marketing arithmetic. Different sizes of hyaluronic acid sit at different depths — larger molecules hold water at the surface for an immediate plumping film, smaller ones penetrate further to hydrate below — and layering them, with a film-forming biosaccharide gum on top, produces moisture that feels more complete and lasts longer than a single-weight HA. On the skin, that translates into a watery serum that absorbs in seconds yet leaves the skin genuinely plumper and fresher rather than just briefly wet. It's the difference between a serum that hydrates and one that only feels like it does.
The green tea hasn't been demoted to nothing, though. At 35,000ppm, reinforced by separate leaf, root, and seed extracts, it still carries the polyphenol antioxidant character and the faint oil-balancing note that defines the line. Around it, Benton layers the soothers it always reaches for — panthenol high up, centella and its isolated madecassoside lower down, houttuynia and pomegranate for support — and a small amount of willow bark for a gentle, salicin-derived clarifying touch. That willow bark is a deliberate signal: this serum is tuned for oily and combination skin, not just the dry skin that hyaluronic acid serums usually court. A whisper of camellia japonica seed oil and tocopherol rounds out the back of the list for a little antioxidant richness without weight.
The experience is defined by lightness. The texture is thin and watery with only the faintest slip, it spreads without effort, and it disappears into the skin almost immediately with no tack and no film. There's no fragrance, just a clean botanical hint that's gone in moments, and no tingle even on reactive skin. You press a few drops in after toner, and on drier areas a second pass goes on just as easily because there's nothing heavy to layer through. For oily and combination skin that wants real hydration without the suffocating feel of a richer serum, this weightlessness is the entire appeal.
The main limitations follow from that same lightness. This is a layering serum, not a standalone moisturizer, and hyaluronic acid behaves best when you respect how it works — applied to slightly damp skin and sealed with a moisturizer, so it holds water in rather than, in very dry air, wicking it from deeper skin. Very dry skin will find the hydration here pleasant but insufficient on its own; it needs a proper cream on top. And like the rest of the line, there's no dramatic single-use payoff — no instant glow-up, no visible overnight change. The benefit is the steady kind: balanced, plumped, comfortable skin that holds up over weeks of consistent use. The 30ml size is also modest, lasting roughly six to eight weeks of twice-daily use, so frequent users will repurchase more often than they would a larger bottle.
Value is reasonable rather than remarkable. At around twenty dollars for 30ml, you're paying a fair price for a thoughtfully layered hydration serum with a green tea antioxidant base and a clarifying lean, fragrance-free, from an established brand. It's not the cheapest hyaluronic acid serum on the shelf — there are barebones HA serums for less — but few at this price pair the multi-weight HA with a genuine green tea base and willow bark for oily skin. Within the Deep Green Tea line, it makes the most sense layered over the toner, the two splitting clarifying-prep and hydration between them.
The recommendation is clear-eyed: if you have combination, oily, or normal skin and want a weightless daily serum that hydrates at multiple depths while staying gentle and lightly clarifying, this is a well-built, sensibly priced option. Sensitive skin will appreciate the fragrance-free soothing base. Dry skin can use it happily as a layer under a richer moisturizer, and only those wanting a single rich serum, a high-strength active, or a bigger bottle should look elsewhere. Read the list in order, top to bottom, and the serum quietly tells you exactly what it is and how to use it.
