Anua Heartleaf 77 Toner Review: What Houttuynia Cordata Actually Does

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Quick answer: Anua’s Heartleaf 77% Soothing Toner lists Houttuynia cordata (heartleaf) water as its first ingredient, so the “77%” claim checks out on the label. The soothing extracts people buy it for, centella, chamomile, burdock, sit near the bottom of the list in small amounts. Heartleaf’s calming effect is backed mostly by lab and animal research, not large human trials, so treat it as a gentle, low-risk toner, not a treatment.

What Is the Anua Heartleaf 77% Soothing Toner, Exactly?

It is a lightweight, gel-textured facial toner from the Korean brand Anua, built around a hydrosol (a water distilled from plant material) of Houttuynia cordata, commonly called heartleaf or fish mint. On anua.com, the product page lists a sale price of $23.00 and offers the toner in 250 ml and 500 ml sizes. The 250 ml bottle is also sold on Amazon and Walmart at 8.45 fl oz, which matches the 250 ml figure. Anua’s own page did not render a separate price for the 500 ml bottle when we checked it in September 2026, since the price switches with JavaScript when you change the size dropdown, so confirm the 500 ml price at checkout before you buy. Anua markets the pH as 5.5, close to the skin’s natural range, and labels the toner fragrance free, non-comedogenic, and cruelty free. You can see current pricing and stock through our tracking link: Anua Heartleaf 77% Soothing Toner.

The Full Ingredient List, and What Actually Comes First

The single most useful thing you can do before buying any “hero ingredient” skincare product is read the INCI list in order, because ingredients are listed by concentration from highest to lowest until you hit about 1%, after which order stops meaning much. Here is Anua’s full list for the Heartleaf 77% Soothing Toner, pulled directly from the product page, with plain-language roles attached.

Two things stand out once you read it this way. First, the heartleaf claim is not empty marketing, the hydrosol genuinely is the first ingredient, ahead of even water. Second, the ingredients most reviewers get excited about, centella, chamomile, burdock, purslane, sit after every preservative, thickener, and pH adjuster, and before an even longer list of hyaluronic acid derivatives. That placement means each of those extracts is present at a low percentage. You get the identifiable back note of “cica-adjacent” ingredients, not a concentrated dose of any one of them. Check the price and current listing through our link: Anua Heartleaf 77% Soothing Toner on Anua.com.

Does Heartleaf Actually Calm Skin? Here Is the Real Evidence

The evidence for Houttuynia cordata is real, but it is mostly lab and animal evidence, not proof that this specific toner changes human skin. A 2025 in vitro study in human gingival epithelial cells found that Houttuynia cordata extract reduced markers of inflammation triggered by interleukin-1 beta (published in Dentistry Journal). Separate cell-culture research on human skin keratinocytes found that fermented Houttuynia cordata reduced oxidative stress markers after UVA and hydrogen peroxide exposure, and that its compounds hyperoside and quercitrin protected keratinocytes from UVB damage through the MAPK and Akt signaling pathways. A mouse study on Houttuynia cordata polysaccharides found the extract eased atopic-dermatitis-like skin damage in mice by restoring barrier proteins and calming immune activity. All three of those are lab dish or animal studies. They tell you the compound is biologically active, not that a diluted hydrosol in a toner will produce the same effect on your face.

The closest thing to a real human trial involving Houttuynia cordata is an 8-week, double-blind, randomized controlled trial published in the Journal of Dermatological Treatment in 2019, with 60 participants split evenly between a treatment and a vehicle group. It found real, statistically significant drops in acne lesion counts and inflammatory markers such as IL-1α and IL-8. Read the fine print, though: the tested product combined four botanical extracts, mangosteen, Lithospermum officinale, Tribulus terrestris, and Houttuynia cordata Thunb, in one formula. It is not a Houttuynia cordata product alone, and it is not the Anua toner. The published abstract does not disclose a funding source. So this trial supports the idea that heartleaf can play a role in a multi-extract acne formula under clinical conditions, and it does not prove that Anua’s single-extract hydrosol toner will do the same thing on your skin.

Dermatologists interviewed by PureWow are cautiously positive rather than convinced. Dr. Michele Koo credits heartleaf with “anti-inflammatory and hydrating properties,” while noting that whether it actually “translates to smoothing rough, angry, and fickle skin… is still not known.” Dr. Lavanya Krishnan says it can help acne-prone, sensitive skin because of its antibacterial qualities, but warns people allergic to sulfonamide medications should be cautious. Dr. Debra Jaliman goes further on the caution side, telling PureWow that some users report tingling and that people with rosacea, active eczema flares, or very reactive skin should steer clear or patch test heavily first (source: PureWow).

Anua’s In-House Numbers vs. Independent Evidence

Anua’s own product page states that skin temperature dropped 14.52% after one use, sebum dropped 49.55% after two weeks, and hydration rose 97.52% after one use. The page labels the product “clinically tested” but does not name the testing lab, the sample size, or a published, peer-reviewed source for any of those three numbers. That does not make the numbers false, in-house instrumental testing is standard practice across Korean beauty brands, but it does mean you should weigh those figures differently than the peer-reviewed lab studies cited above. One is marketing copy from the company selling the product. The other is research that passed outside review before publication. Neither one is a substitute for trying a small amount on your own skin first.

Do You Even Need a Toner? What the Evidence Actually Shows

A toner is one of the more optional steps in a skincare routine, and it is worth saying that plainly before you spend $23 on one. Dermatology practices going into 2026, such as AboutSkin Dermatology in Denver, describe the non-negotiable base of any routine as a cleanser, a moisturizer, and a sunscreen. Toner does not make that list. The evidence backing daily broad-spectrum sunscreen against photoaging and skin cancer, or backing retinoids for acne and fine lines, or backing basic moisturizers for barrier repair, rests on decades of large randomized trials. The evidence for a soothing toner improving outcomes is a fraction of that size, mostly ingredient-level lab studies like the ones above rather than head-to-head trials of finished toners. That does not mean a toner is useless. If you have oily or combination skin, a toner can help remove residue after cleansing and give a light hydration layer before serum. It just means a heartleaf toner is a nice-to-have layered on top of the parts of your routine that actually carry the strongest evidence, not a replacement for any of them.

What Real Users Report

Independent reviews and skincare forum threads about this toner are mostly positive on texture and immediate calming feel, but a recurring minority complaint is worth flagging directly: some users report jawline breakouts appearing roughly two weeks in, and others describe redness or itching within the first three days of use. Because this toner contains no AHA, BHA, or retinoid, a true purge, meaning increased breakouts from accelerated cell turnover pushing existing clogs to the surface, is not chemically plausible here. The more likely explanations are a genuine sensitivity to the fermented Houttuynia cordata extract itself, since a small percentage of users react to fermented skincare ingredients regardless of how mild they test on average, or simple friction irritation from rubbing a cotton pad across the face rather than patting the toner in with clean hands. If your skin reacts, changing your application method before assuming the product itself is the problem is worth trying first.

Who Should Not Buy the Anua Heartleaf Toner

• People with reactive, plant-extract-sensitive skin. This formula carries seven separate plant extracts plus a fermented hydrosol. If your skin has flagged fragrance-free “clean” Korean products before, more extracts means more chances for one of them to be your trigger.
• Anyone with rosacea or an active eczema flare. Dr. Jaliman’s caution above is specific: very red, rosacea-prone, or actively flaring eczema skin is the profile most likely to feel tingling or worsen with heartleaf.
• Anyone mid-treatment on a prescription regimen. If you are using prescription tretinoin, hydroquinone, or another dermatologist-directed treatment, add one new product at a time and ask your prescriber first, since a new toner can complicate tracking which product is causing an unexpected reaction.
• Anyone trying to simplify to three steps. If your goal for 2026 is cleanser, moisturizer, sunscreen and nothing else, as several dermatology practices now recommend, a soothing toner is an add-on you can skip without losing the evidence-backed core of your routine.

How to Patch Test This Toner Before You Use It on Your Whole Face

Patch testing takes three days and costs you nothing but a little patience, and it catches the sensitivities described above before they show up on your whole face.

1. Apply a small amount of the toner to a clean patch of skin on your inner forearm or behind your ear, an area about the size of a coin.
2. Leave it uncovered and undisturbed, do not wash the area, and check it after 20 minutes for any immediate stinging, hives, or redness.
3. If nothing happens after 20 minutes, repeat the same small application once a day for two more days, checking each morning before reapplying.
4. Only move to your full face on day four if the patch stays clear through all three checks.

Stop immediately and wash the area with plain water if you see spreading redness, swelling, hives, blistering, or if the itching gets worse rather than fading within an hour. Those are red flags for a true allergic or irritant reaction, not normal “purging,” and they mean this specific formula is not for your skin, regardless of what the ingredient list promises.

Bottom Line

Anua’s Heartleaf 77% Soothing Toner earns its name on the label, heartleaf water really is the first ingredient. The calming extracts you may be buying it for are real but present in small amounts, and the strongest evidence behind Houttuynia cordata itself comes from lab dishes and animal models rather than large human trials on this exact product. Used as a gentle, optional add-on layered after cleanser and before a real moisturizer and sunscreen, it is a reasonable, low-risk toner for most people, as long as you patch test first and stop if you see redness that does not fade. You can check current pricing and availability here: Anua Heartleaf 77% Soothing Toner.

Frequently Asked Questions

Is the Anua Heartleaf toner good for acne-prone skin?

It may help as a calming layer, since Houttuynia cordata has documented anti-inflammatory activity in lab studies, and the toner is labeled non-comedogenic. It is not an acne treatment on its own, it contains no salicylic acid, benzoyl peroxide, or retinoid, so pair it with an actual acne active rather than expecting the toner alone to clear breakouts.

Does the Anua Heartleaf toner contain fragrance?

Anua labels the product fragrance free on its product page. It does contain multiple plant extracts, which can still cause reactions in fragrance-sensitive skin even without added perfume, so patch testing still matters.

Can I use the Heartleaf toner with retinol or vitamin C?

Yes, most people layer it underneath those actives without issue, since it is alcohol-free and pH-balanced. Introduce it on its own for a few days first if you are also starting a new retinol or vitamin C product, so that if irritation shows up you know which product caused it.

Is heartleaf the same thing as Houttuynia cordata?

Yes. Heartleaf, fish mint, and Houttuynia cordata all refer to the same plant, a perennial herb used in traditional medicine across China, Japan, Korea, and Southeast Asia long before it became a Korean skincare marketing term.

How long does one 250 ml bottle last?

With typical twice-daily use across the whole face, a 250 ml bottle generally lasts eight to twelve weeks, depending on how much product you use per application and whether you apply it with hands or a cotton pad, which tends to use more product per use.

Why does Anua’s product page show different testing numbers than the studies in this review?

Anua’s 14.52%, 49.55%, and 97.52% figures come from the company’s own in-house testing of the finished toner, disclosed without a named lab or published paper. The studies cited earlier in this review are independent, peer-reviewed research on Houttuynia cordata as an ingredient, not on this specific finished product, which is why the two sets of numbers are not directly comparable.