What Korean heartleaf does for your skin
Heartleaf is the English name for Houttuynia cordata, a low, fast-spreading herb eaten as a vegetable and brewed as a folk remedy across Korea and East Asia long before it reached a serum bottle. Korean brands turned that calming reputation into a skincare category — Anua built much of its range on it — and the bottles now sit on Australian shelves, pitched at the redness-prone skin our climate doesn't help. This guide covers what heartleaf does, what the evidence behind it supports, how it differs from the centella it keeps getting confused with, and where it earns a place in a routine.
Heartleaf turns up on the front of a lot of Korean bottles, usually beside the word “soothing”. What the plant is, and how much it does once it’s in a formula, is worth knowing before you judge the products built around it.
Where heartleaf comes from
Heartleaf is the common name for Houttuynia cordata, a low, fast-spreading herb native to East Asia — you’ll also see it sold as the “chameleon plant”, or “fish mint” for the sharp smell of the fresh leaves. In Korea and across the region it has a long life outside skincare: eaten as a leaf vegetable, brewed into a tea, and used in folk medicine to settle inflammation. Korean brands took that calming reputation and made a skincare ingredient out of it, usually as a water-like extract that stands in for some or all of the plain water in a formula. The plant on your toner label is the same hardy weed that grows in ditches across the region, which is part of why a heartleaf product tends to be inexpensive.
What it does, and what the evidence shows
Heartleaf’s job in a formula is to calm — to take the heat out of skin that runs red, reactive or irritated. The plant carries a set of flavonoids, plant compounds including quercitrin, and these are what the research keeps coming back to. In lab and animal work they behave as anti-inflammatories and antioxidants: they damp down the chemical signals skin raises when it’s inflamed, and they mop up the reactive molecules that drive that response. In one 2010 study on human skin cells, a heartleaf extract cut two of those inflammatory signals — TNF-α and COX-2 — by roughly 40 to 50% in irritated dermal fibroblasts, the cells that sit in the deeper layer of skin.
The scope matters as much as the result. Almost all of this work is preclinical — cells in a dish, or mice, rather than people using a toner for eight weeks — so the fair read is that heartleaf is a well-evidenced soother rather than a proven treatment for any skin condition. It may help calm everyday redness and support a stressed barrier; it isn’t a fix for eczema, rosacea or acne, and a skincare product can’t claim to be.
Heartleaf or centella? They’re not the same
Heartleaf gets shelved next to centella — “cica” on a lot of packaging — and the two get used as though they’re interchangeable. They aren’t. Centella is Centella asiatica, a different plant, sometimes called tiger grass, and its actives are a specific set of compounds, asiaticoside and madecassoside among them. A 2021 review of Centella asiatica in skin disease gathers evidence for wound healing and barrier repair that heartleaf doesn’t yet have behind it.
For a shopper the practical difference is small but real. Both are gentle, both aim to calm, and neither is a strong treatment active, so if your skin is reactive and you want a soothing layer, either suits. If you specifically want the more-studied option for supporting a damaged barrier, centella is the one with more research behind it. Heartleaf’s pull is its lightness and its price.
Where it works, and where it’s mostly on the label
Whether heartleaf does anything in a given product comes down to two things: how much is in there, and whether you leave it on.
A leave-on product at a high concentration is where it earns its keep. A soothing toner built around 70 to 80% heartleaf extract is mostly heartleaf, and it stays on the skin through the rest of your routine — the format with a real chance to calm. The Anua Heartleaf 77 Soothing Toner is the clearest example: heartleaf leads its ingredient list at 77%, there to settle reactive skin rather than ride along as a label note.
A wash-off product is the opposite. In a cleanser, heartleaf usually sits well down the ingredient list and spends about a minute on your skin before it goes down the drain, so any soothing is slight — the cleansing is the point, and the herb is mostly there for the name. The Anua Heartleaf Pore Control Cleansing Oil is a good cleanser, but the heartleaf isn’t the reason to buy it.
So a rule of thumb when you shop: read where heartleaf sits on the ingredient list, and favour the leave-on steps — toners, essences, serums and moisturisers — if the soothing is what you’re after.
Who it’s for
Heartleaf suits sensitive, redness-prone or easily-overheated skin — the face that flushes after cleansing, exercise, wind or a day in our sun, and wants a calm, hydrated base without a sting. Because the better heartleaf products are fragrance- and alcohol-free, they’re a low-drama choice for skin that reacts to those. It layers under the rest of a routine and won’t fight a treatment active you’re using in another step.
It’s the wrong tool if you want a step that does more — exfoliates, fades marks, smooths texture or clears breakouts. Heartleaf soothes and helps hold hydration; the active work belongs to a serum or treatment. And if your skin is already calm and comfortable, a soothing ingredient is answering a question you haven’t asked.
Where to start
If your skin runs reactive, the easiest entry is a heartleaf toner at the tone step, after cleansing and before your essence or serum; you can see how that slots together in our guide to building a Korean routine. For the first cleanse, a heartleaf cleansing oil is fine, but choose it on how well it cleanses — and if you’re after a gentle wash for sensitive skin, our best Korean cleansers for sensitive skin compares the options. As with anything new on reactive skin, patch-test it first.
