Anua Heartleaf 77% Soothing Toner Review: Does the Viral Toner Deserve It?

Heartleaf had a quiet reputation in Korean skincare for years before Anua's version turned it into one of the most viral toners of the decade. The ingredient isn't new or invented for marketing — it's a genuine anti-inflammatory extract with a long history in Korean herbal medicine, which is part of why the hype held up instead of fading in a season.

What heartleaf (Houttuynia cordata) actually does

It's primarily known for calming and anti-inflammatory properties, which makes it a go-to for redness, irritation, and reactive skin. That reputation rests on lab and animal research plus a long history of use in Korean herbal medicine — not on clinical trials of the toner itself, so think of it as well-supported traditional use rather than proven treatment. This isn't an exfoliating or resurfacing toner — it's a barrier-support, skin-calming one, closer in purpose to centella than to a glycolic acid toner.

Texture and how it feels

Watery, almost like a light essence rather than a traditional astringent toner. It's meant to be patted or swept on with a cotton pad and layered — Anua's own marketing leans into using multiple layers ("7-skin method" style) for more intense hydration, though one layer is enough for daily maintenance.

Who it's genuinely good for

• Reactive, easily-flushed, or rosacea-prone skin looking for a calming daily step
• Anyone doing active ingredients (retinoids, exfoliating acids) who wants a buffering step to reduce irritation
• Post-sun or post-treatment skin that needs to calm down before the rest of a routine

Who might not need it

• If your skin isn't reactive or irritation-prone, a heartleaf toner is a "nice to have," not a routine-defining upgrade — a basic hydrating toner will do the same core job
• Not an exfoliant and won't help with texture or dullness the way an AHA/BHA toner would

Where it fits in the routine

Toner is step 4 in the 10-step routine, right after cleansing — this is exactly that slot. It layers fine under an essence or serum without pilling.

Bottom line: the virality is earned — it's a genuinely well-formulated calming toner, just not a universal must-have if your skin isn't the reactive type it's built for.

References

Peer-reviewed sources for the ingredient claims above, retrieved from PubMed. Cite the linked DOI when reusing any of this.

• Houttuynia cordata Thunb.: an ethnopharmacological review — Front Pharmacol, 2021 — review
• Pharmacological effects of Houttuynia cordata Thunb.: a comprehensive review — Pharmaceuticals (Basel), 2022 — review
• Houttuynia cordata polysaccharides ameliorate atopic dermatitis in mice — Int J Biol Macromol, 2025 — animal study