Ingredient dossier Nº 025 / The verified record
Heartleaf (Houttuynia Cordata)
HOUTTUYNIA CORDATA EXTRACT
Effective concentration, the pH it needs, how the derivatives compare, stability in the bottle, and the open questions — every scientific claim on this page links to its source.
- soothing
- antioxidant
- anti-inflammatory (skin-conditioning/soothing)
- skin conditioning
- antimicrobial
Editorial verdict / Social intelligence
A genuinely soothing, vegan calming botanical with real lab credentials — just lab-and-tradition, not facial-trial, evidence. 1
- Beauty benefit
- Heartleaf (Houttuynia cordata) is the gentle K-beauty calming botanical — a flavonoid- and polysaccharide-rich herb behind the wave of 'heartleaf' toners for sensitive, redness-prone, and blemish-prone skin.
- Does it work
- Yes for soothing, with honest limits. Heartleaf has real anti-inflammatory and antioxidant activity — it calms inflammatory signaling and protects skin cells in lab studies, eases atopic-dermatitis-like inflammation in mice, and has a long traditional use for irritated, blemish-prone skin. The catch: almost all of this is cell-culture, animal, or traditional evidence — there are essentially no controlled facial trials — and the plant's strength varies with how it's processed. It's a lovely, gentle calming ingredient (and vegan), just not a clinically proven treatment. See the science below →
Consensus strength
ModerateHeartleaf is widely loved in K-beauty as a gentle calming ingredient for sensitive and blemish-prone skin and has real anti-inflammatory and antioxidant activity in lab and animal studies plus long traditional use — but controlled human facial-cosmetic evidence is essentially absent, and extract strength varies with how the plant is processed.
01 / What it does
What it does
Heartleaf — Houttuynia cordata, a herb long used in East Asian traditional medicine and nicknamed the 'Chinese herbal antibiotic' — is the K-beauty soothing botanical behind the wave of 'heartleaf' toners and essences. Its activity comes from a mix of flavonoids (notably quercitrin, a quercetin glycoside), polysaccharides, alkaloids, phenolic acids, and volatile oils, which together give it documented anti-inflammatory, antioxidant, and antimicrobial properties. In skin-relevant lab work, Houttuynia extracts calm inflammatory signaling (via the MAPK/NF-κB pathway) and protect skin cells from oxidative stress, and in animal models its polysaccharides ease atopic-dermatitis-like inflammation. That profile is why it's positioned for sensitive, reactive, redness-prone, and blemish-prone skin. The honest backdrop: nearly all of this evidence is in cell culture, animal models, or traditional-medicine reviews — there's very little controlled facial-cosmetic data — and the plant's composition, and therefore its strength, varies with how it's grown, dried, and processed.
- Review Houttuynia cordata is a medicine-food-homology plant whose main phytochemical constituents are volatile oils, flavonoids, polysaccharides, and alkaloids, with considerable traditional clinical applications and health benefits. 1
- Review Houttuynia cordata contains alkaloids, essential oils, phenolic acids, and flavonoids and is used for its anti-inflammatory, anti-bacterial, anti-viral, and anti-oxidant properties. 2
- Study Houttuynia cordata fermentation broth inhibited the LPS-induced skin inflammatory response and barrier damage via the MAPK/NF-κB signaling pathway, reflecting its antioxidant and anti-inflammatory activity in skin cells. 3
- Study An antioxidant and anti-aging compound isolated from Houttuynia cordata was identified as quercetin 3-O-rhamnoside (quercitrin), which raised antioxidant-enzyme activity and reduced intracellular reactive oxygen species in a model organism. 4
02 / Effective concentration
What percentage actually works
Effective range
No standardized cosmetic concentration. Korean 'heartleaf 77%/X%' labels describe how much of the formula is the extract, not a standardized level of any active compound
There is no validated effective concentration for topical Houttuynia. The high percentages on 'heartleaf' toners refer to extract content, not a measured dose of the flavonoids or polysaccharides thought to do the work — and because the plant's composition varies with processing, a higher label percentage does not reliably mean a stronger or more consistent product.
Houttuynia is used as a whole-plant water or fermented extract whose active profile (flavonoids such as quercitrin, polysaccharides, phenolic acids) shifts with cultivation, drying, and fermentation. Cosmetic products advertise the proportion of the formula that is Houttuynia extract (e.g. '77%'), which is a marketing-meaningful figure but not a standardized active dose. One lab study found the water-soluble extract needed lipid nanocarriers to meaningfully permeate skin, so even delivery of the actives from a simple toner isn't guaranteed.
- Study Lipid nanocarriers (especially cubosomes) were needed to enhance the in-vitro skin permeation of a water-soluble Houttuynia cordata extract and boost its anti-atopic efficacy in hairless mice — indicating limited inherent skin penetration of the plain extract. 5
- Study Hot-air drying temperature significantly affected the chemical composition, bioactive-compound preservation, and antioxidant activity of Houttuynia cordata, showing how processing changes the finished extract. 6
One honest caveat Composition (flavonoid/quercitrin and polysaccharide content) varies with cultivation, drying temperature, and fermentation, so 'Houttuynia cordata extract' / 'heartleaf 77%' is not a standardized dose.
03 / pH requirement
The pH it needs
Target pH
No pH gate — it's a botanical flavonoid/polysaccharide extract, not a pH-activated acid
Houttuynia cordata has no acidic-pH requirement; its soothing and antioxidant effects come from flavonoids, polysaccharides, and phenolics that act independently of formulation pH. The meaningful variables are sourcing and processing (drying, fermentation), which determine the actual active content, and delivery — getting those actives into the skin from a leave-on or rinse-style product.
- Study Processing conditions such as drying temperature change the bioactive-compound content and antioxidant activity of Houttuynia cordata, so the same plant can yield differently active extracts. 6
04 / Derivative ladder
How the derivatives compare
Every derivative trades a measure of proven activity for stability or gentleness. Skin conversion is the question that matters — a more stable molecule only helps if your skin can turn it back into the active form.
Heartleaf (Houttuynia Cordata) has no meaningfully used cosmetic derivative ladder — it is formulated as the free acid itself. That is the form the research below was run on, so there is no conversion step to discount.
05 / Stability & storage
Stability in the bottle
As a flavonoid- and polysaccharide-rich botanical, Houttuynia's actives are subject to oxidation and light degradation, so antioxidant co-formulants and protective packaging help. The defining issue, though, is consistency: the plant's composition varies with where and how it's grown, dried, and processed, and fermentation can substantially change (and in some cases increase) its polyphenol and flavonoid content. Standardisation to marker compounds is the exception rather than the rule in cosmetic products, so batch-to-batch and brand-to-brand variability is real.
- Study Fermenting Houttuynia cordata (with Aureobasidium pullulans) increased its total polyphenol content roughly 5.4-fold and flavonoids roughly 2.3-fold versus the plain water extract, and the fermented extract protected human keratinocytes from UVA/H2O2 oxidative stress — showing how processing changes both content and activity. 7
In practice Buy it in an opaque, airless, or amber container, store it cool and out of the light, and treat a colour shift toward orange or brown as the signal to replace it — the molecule is telling you it has already oxidised.
06 / How to use it
How to actually use Heartleaf (Houttuynia Cordata)
- When
- AM/PM — Toner/essence right after cleansing.
- Pairs well with
- centella, niacinamide.
- Apply apart from
- Nothing major — it layers comfortably with most actives.
- What to look for
- A high-percentage heartleaf toner or essence.
- Heads-up
- Very gentle and calming for sensitive/reactive skin. Vegan.
Practical guidance for routine placement — not a substitute for a dermatologist’s advice for your skin.
07 / The database
Heartleaf (Houttuynia Cordata): measured product rankings coming soon
Ranked by $ per gram of active — what the working ingredient actually costs you, not the sticker price. Rows we have reviewed in full link through; the rest are data points from the same crawl.
Buy Anua on Amazon $19.69 Top-ranked pick · affiliate link
No measured products yet — this active's price-per-gram rankings will appear here as products are added.
In the meantime, see how to use Heartleaf (Houttuynia Cordata) and what to look for on a label .
Contains it, but doesn't disclose a percentage: Anua Anua Heartleaf 77% Soothing Toner ; Abib Abib Heartleaf Calming Toner Skin Booster ; Abib Abib Heartleaf Spot Pad Calming Touch
08 / Safety
Is it safe?
Cosmetic Ingredient Review status
Houttuynia cordata is a 'medicine food homology' plant with a long history of dietary and topical use and a generally favourable safety profile; consult the phytochemistry/pharmacology reviews for formal safety summaries rather than a single CIR PMID.
Houttuynia has a reassuring tolerability record: it's a food-and-medicine plant used traditionally for skin complaints, and its safety is summarised favourably in pharmacological reviews. As a plant extract it is vegan-friendly and broadly well tolerated. The usual botanical caveat applies — any plant extract can occasionally sensitise, particularly in people with multiple plant allergies or very reactive skin — so a patch test before extended facial use is sensible. There is no evidence of serious topical toxicity at cosmetic use levels, but the human safety data are largely traditional and review-based rather than from controlled cosmetic trials.
- Review A comprehensive review summarised the traditional applications, phytochemistry, pharmacology, and safety of Houttuynia cordata, supporting its long-standing use and favourable safety profile. 1
- Study A Houttuynia cordata poultice has been traditionally used in Japan for purulent skin conditions, and an ethanol extract showed antibacterial and anti-inflammatory effects — consistent with its soothing, blemish-friendly positioning. 8
09 / The limits of the evidence
What we don't know yet
Most of what you read about this ingredient is stated with more certainty than the evidence earns. Here is exactly where the record thins out — so you can weigh the claims above for yourself.
- Nearly all skin evidence is in-vitro (keratinocyte culture), animal (mouse atopic dermatitis, C. elegans), or traditional-medicine review — controlled human facial-cosmetic trials are essentially absent.
- One study found the water-soluble extract needed lipid nanocarriers to permeate skin meaningfully, so delivery of the actives from a simple toner or essence isn't guaranteed.
- Composition (flavonoid/quercitrin and polysaccharide content) varies with cultivation, drying temperature, and fermentation, so 'Houttuynia cordata extract' / 'heartleaf 77%' is not a standardized dose.
- The high label percentages describe extract content, not a measured level of any active compound, and products rarely disclose marker-compound content.
- Antimicrobial / anti-blemish support is largely traditional and in-vitro, not from facial acne RCTs.
- Much activity is attributed to specific compounds (quercitrin, polysaccharides) whose amounts differ between extracts and aren't listed on labels.
10 / What people say
What formulators and users say
What works
- Common Genuinely calming — soothes inflammation and supports the barrier for reactive, redness-prone skin 18
Houttuynia cordata Thunb is rich in active substances and has excellent antioxidant and anti-inflammatory activity. Study
-
This study evaluated the antioxidant and anti-aging effects of Houttuynia cordata extract and fractions using Caenorhabditis elegans. Study
- Some Long traditional use for irritated, blemish-prone skin, with lab antibacterial support 4
HC poultice (HCP) prepared from smothering fresh leaves of HC was most frequently used for the treatment of purulent skin diseases including furuncle and carbuncle with high effectiveness. Study
What to know
- Common The evidence is lab, animal, and traditional — there are essentially no controlled facial-cosmetic trials 5
HCP alleviated AD in MC903-induced mice by reducing epidermal thickness, skin lesions, mast cell infiltration, inflammatory cytokines Study
- Common A '77% heartleaf' label is extract content, not a defined dose — and the plant's strength shifts with processing 6
evaluating how freeze-drying and hot-air drying (40 °C, 50 °C, 60 °C) affect bioactive compound preservation, antioxidant efficacy, and metabolic profiles Study
What you'd only know from the reviews
-
In one lab study the water-soluble heartleaf extract only permeated skin well when packaged in lipid nanocarriers — so a plain 'heartleaf' toner delivering its actives deep isn't a given. Much of the comfort you feel is genuine surface soothing rather than proven deep action. 7
-
Unlike snail mucin or propolis, heartleaf is plant-derived, so it's vegan-friendly — a real plus for some shoppers. Its activity is credited to specific compounds (the quercetin glycoside quercitrin, polysaccharides) whose amounts vary by extract and aren't disclosed on labels. 8
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
11 / Questions
Frequently asked
- What is heartleaf (Houttuynia cordata) and what's in it?
- Heartleaf is Houttuynia cordata, a herb used for centuries in East Asian medicine (and eaten as a vegetable), nicknamed the 'Chinese herbal antibiotic'. Its skincare activity comes from flavonoids (especially quercitrin, a quercetin glycoside), polysaccharides, phenolic acids, alkaloids, and volatile oils, which give it anti-inflammatory, antioxidant, and antimicrobial properties. It's the soothing botanical behind the popular 'heartleaf' toners. 12
- Does heartleaf actually calm and soothe skin?
- The lab and animal evidence is genuinely supportive: Houttuynia extract calmed an inflammatory skin response and protected the barrier through the MAPK/NF-κB pathway in skin cells, and its polysaccharides eased atopic-dermatitis-like inflammation in mice. So the soothing reputation has a real mechanistic basis. The honest caveat is that this is in-vitro and animal work — there's very little controlled human facial-cosmetic data — so treat it as a promising, gentle calming ingredient rather than a proven treatment. 39
- Is heartleaf antioxidant or anti-aging?
- It has clear antioxidant activity in lab models: a quercetin glycoside (quercitrin) isolated from Houttuynia boosted antioxidant enzymes and lowered reactive oxygen species, and fermented Houttuynia protected human skin keratinocytes from UVA- and peroxide-induced oxidative stress. That's a legitimate antioxidant profile — but it's cell- and model-organism evidence, not human anti-aging trials, and antioxidant support is a complement to sunscreen, never a replacement. 47
- Is heartleaf good for acne or blemish-prone skin?
- Traditionally yes, and there's mechanistic support: Houttuynia has long been used topically for purulent skin problems, and extracts show antibacterial and anti-inflammatory effects in the lab. That fits its 'calm and clarify' positioning for blemish-prone skin. But there are no solid facial acne trials, so think of it as a soothing, lightly antibacterial support ingredient rather than a dedicated acne treatment. 82
- Why do heartleaf products vary, and does '77%' mean it's strong?
- A high percentage like '77% heartleaf' tells you how much of the formula is the extract, not how much active compound it contains. And Houttuynia's actual flavonoid and polysaccharide content shifts with how the plant is grown, dried, and fermented, so two 'heartleaf' products can differ quite a bit. The percentage is a marketing figure; consistency depends on the brand standardising the extract, which most don't disclose. 67
- Is heartleaf safe? Is it vegan?
- It has a good tolerability record — it's a food-and-medicine plant with long traditional topical use and a favourable safety summary in pharmacological reviews — and because it's a plant extract, it's vegan-friendly. The standard botanical caveat applies: any plant extract can occasionally cause sensitivity, especially in very reactive skin or with multiple plant allergies, so patch-test before extended facial use. The human safety data are mostly traditional and review-based rather than from controlled cosmetic trials. 18
12 / References
Sources
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9