Some By Mi AHA BHA PHA 30 Days Miracle Toner Review: Worth the Purging Warnings?
It has a cult following and an equally loud group of people warning you about the 'purge.' Here's what a triple-acid toner actually does and how to introduce it without wrecking your barrier.
This is a different category of toner than the calming, hydrating ones that dominate most K-beauty routines. Some By Mi's Miracle Toner is an exfoliating toner — it combines AHA, BHA, and PHA acids plus 2% niacinamide, and it built its reputation on before-and-after texture photos rather than the usual "glow" marketing.
What three acid types actually do together
AHA (glycolic-family) exfoliates the skin's surface for texture and tone. BHA (salicylic acid) is oil-soluble, so it gets into pores to clear congestion — the acid most relevant for blackheads and closed comedones. PHA is the gentlest of the three, exfoliating with less irritation potential, which is what makes a triple-acid formula usable more often than a straight glycolic or salicylic toner would be. Niacinamide is added on top for oil control and tone support.
About the "purging" warnings
Introducing any exfoliating acid can bring underlying congestion to the surface faster than it would clear on its own — that's what "purging" describes. It's a widely reported pattern, though it's never actually been proven in a controlled study, and it's easy to confuse with straightforward irritation from overuse. The honest approach: start with 2-3 nights a week, not daily, and give it two to four weeks before judging whether it's working or just irritating your skin. If skin is getting worse rather than clearing after a month, that's irritation, not a purge — stop.
Who it's genuinely good for
- Oily, acne-prone, or texture-focused skin dealing with clogged pores, blackheads, or rough patches
- Anyone who's outgrown a gentler exfoliating toner and wants something with more active ingredients
- Skin that tolerates actives reasonably well — this isn't a first exfoliant to try if you've never used one before
Who should skip it
- Already-compromised or reactive skin — start with a calming toner like Anua's heartleaf instead and revisit acids once your barrier is stable
- If you're already using a separate leave-on AHA/BHA exfoliant elsewhere in your routine, stacking two exfoliating steps is more likely to over-exfoliate than to double the benefit
Where it fits in the routine
It technically covers both step 3 (exfoliator) and step 4 (toner) in the 10-step routine, which is part of why it's popular — it simplifies a two-step process into one. Follow with a hydrating essence to rebalance, not skip it.
Bottom line: it earns the reputation for texture and congestion, but it's an active product, not a daily-use-forever one — patch test, go slow, and don't add it on top of an already-acid-heavy routine.
References
Peer-reviewed sources for the ingredient claims above, retrieved from PubMed. Cite the linked DOI when reusing any of this.
- Topical azelaic acid, salicylic acid, nicotinamide, sulphur, zinc and fruit acid (alpha-hydroxy acid) for acne — Cochrane Database Syst Rev, 2020 — systematic review & meta-analysis
- Salicylic acid as a peeling agent: a comprehensive review — Clin Cosmet Investig Dermatol, 2015 — review
- Cosmeceuticals in photoaging: a review — Skin Res Technol, 2024 — systematic review
- Lactic and lactobionic acids as typically moisturizing compounds — Int J Dermatol, 2018 — review
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