AHA, BHA, PHA 30 Days Miracle Serum
AHA, BHA, PHA 30 Days Miracle Serum
Product Description
Product overview
A bi-phase exfoliating serum with 14.5% Centella Asiatica and 10,000 ppm Tea Tree Leaf Water. This triple-acid formula combines AHA, BHA, and PHA to gently resurface skin, unclog pores, and boost radiance while soothing irritation and strengthening the skin barrier. pH 5.5 balanced for sensitive skin compatibility.
Triple Acid Exfoliation
AHA (glycolic, lactic, citric acid) exfoliates the surface, BHA (wintergreen extract) unclogs pores from within, and PHA (lactobionic acid) gently resurfaces while hydrating.
Texture & feel
SENSORYTriple Acid Exfoliation
AHA (glycolic, lactic, citric acid) exfoliates the surface, BHA (wintergreen extract) unclogs pores from within, and PHA (lactobionic acid) gently resurfaces while hydrating.
14.5% Centella Asiatica
High concentration of cica extract soothes irritated and inflamed skin, strengthens the skin barrier, and supports collagen production for scar healing.
10,000 ppm Tea Tree Water
Natural antibacterial and anti-inflammatory ingredient that helps control sebum, fight acne-causing bacteria, and calm redness without harsh drying effects.
Niacinamide Brightening
Vitamin B3 helps fade post-acne marks, even out skin tone, minimize pore appearance, and regulate oil production for a clearer complexion.
Safety & compatibility
SAFEContains glycolic acid, lactic acid, and wintergreen leaf extract (natural BHA/salicylic acid source). While concentrations are very low (ppb range), most dermatologists advise caution with AHAs/BHAs during pregnancy. Consult your doctor before use.
Not fungal acne safe. Contains Cetyl Ethylhexanoate, Caprylic/Capric Triglyceride, and Olea Europaea (Olive) Fruit Oil, which are known triggers for malassezia folliculitis. Avoid if you have active fungal acne.
Rated 1/5 on the comedogenic scale. Despite containing olive oil (moderately comedogenic alone), the overall formula is lightweight and has passed non-comedogenic testing. Unlikely to clog pores for most skin types.
Has passed skin irritation tests for sensitive skin. The pH 5.5 formulation is gentle enough for daily use on most skin types, though the acids may tingle on very reactive skin.
Alcohol appears mid-list in the INCI, suggesting a moderate concentration. It helps the bi-phase formula absorb quickly but may be drying for very dry or compromised skin barriers.
AHAs and BHAs increase photosensitivity. Always apply broad-spectrum SPF 30+ during the day when using this serum, even on cloudy days.
Ingredient breakdown
INGREDIENTSCentella Asiatica Extract 14.5%Proven
A powerhouse soothing ingredient also known as cica or gotu kola. Contains four key compounds — madecassoside, asiaticoside, madecassic acid, and asiatic acid — that work together to calm inflammation, accelerate wound healing, and stimulate collagen synthesis.
- Clinical evidence: Studies show centella asiatica promotes collagen type I synthesis and reduces inflammation markers in skin cells.
- Concentration: 14.5% (14,770 ppm) is a high therapeutic concentration, well above the typical 1–5% found in most cica products.
- Benefit: Soothes post-acne redness, supports scar healing, and strengthens the skin barrier.
Tea Tree Leaf Water 10,000 ppmProven
Melaleuca alternifolia leaf water provides natural antibacterial and anti-inflammatory benefits. Unlike concentrated tea tree oil, tea tree water is gentler and less likely to cause irritation while still offering acne-fighting properties.
- Clinical evidence: Tea tree oil/water has demonstrated effectiveness against P. acnes bacteria in multiple clinical trials.
- Concentration: 10,000 ppm (1%) — a meaningful amount for antibacterial activity without the harshness of pure tea tree oil.
- Benefit: Controls sebum, fights blemish-causing bacteria, and reduces redness.
AHA Complex (Glycolic, Lactic, Citric, Malic, Tartaric, Pyruvic Acid) Trace (ppb)Proven
A blend of six alpha-hydroxy acids that work on the skin surface to dissolve the bonds between dead cells, revealing smoother, brighter skin underneath. The multi-acid approach provides gentle yet effective exfoliation.
- Glycolic Acid (3,150 ppb): Smallest AHA molecule; penetrates deepest for brightening and collagen stimulation.
- Lactic Acid (3,150 ppb): Gentle AHA that also moisturizes; great for sensitive skin.
- Citric Acid (7,875 ppb): Antioxidant AHA that helps even skin tone.
BHA — Wintergreen Leaf Extract 105 ppmProven
Gaultheria procumbens (wintergreen) leaf extract is a natural source of methyl salicylate, which converts to salicylic acid on the skin. BHA is oil-soluble, allowing it to penetrate inside pores and dissolve sebum plugs and impurities.
- Mechanism: Oil-soluble BHA penetrates pore lining to clear out trapped sebum, dead cells, and bacteria.
- Concentration: 105 ppm — a gentle dose suitable for daily use without over-stripping the skin.
- Benefit: Unclogs blackheads and whiteheads, controls oil, and has anti-inflammatory properties.
PHA — Lactobionic Acid 105 ppmPromising
A next-generation polyhydroxy acid that exfoliates as gently as AHAs but with added humectant and antioxidant benefits. Larger molecular size means less penetration and less irritation, making it suitable for sensitive skin.
- Clinical evidence: PHAs are shown to improve skin texture, hydration, and barrier function with significantly less irritation than glycolic acid.
- Bonus: Acts as a humectant (attracts moisture) and antioxidant, unlike traditional AHAs.
- Benefit: Smooths and brightens skin while retaining moisture — ideal for sensitive or dry skin types.
Niacinamide (Vitamin B3) Not disclosedProven
A multitasking ingredient that brightens, minimizes pores, regulates sebum, and strengthens the skin barrier. Works well at concentrations of 2–5%, and appears mid-list in this formula.
- Clinical evidence: Extensive research supports niacinamide for reducing hyperpigmentation, improving skin elasticity, and decreasing sebum production.
- Synergy: Complements AHAs/BHAs by calming irritation and supporting barrier repair after exfoliation.
62 ingredients
Water, Centella Asiatica (Gotu Kola) Extract (14.77%), Cetyl Ethylhexanoate, Caprylic/Capric Triglyceride, Glycerin, Olea Europaea (Olive) Fruit Oil, Propanediol, Alcohol, Butylene Glycol, 1,2-Hexanediol, Niacinamide, Melaleuca Alternifolia (Tea Tree) Leaf Water (10,000ppm), Camellia Sinensis (Green Tea) Leaf Extract, Scutellaria Baicalensis (Baikal Skullcap) Root Extract, Polygonum Cuspidatum (Japanese Knotweed) Root Extract, Glycyrrhiza Glabra (Licorice) Root Extract, Chamomilla Recutita (Matricaria) Flower Extract, Rosmarinus Officinalis (Rosemary) Leaf Extract, Sodium Lactate (18,375ppb), Sodium PCA (7,875ppb), Citric Acid (7,875ppb), Lactic Acid (3,150ppb), Malic Acid (3,150ppb), Glycolic Acid (3,150ppb), Pyruvic Acid (525ppb), Tartaric Acid (10.5ppb), Gaultheria Procumbens (Wintergreen) Leaf Extract (105ppm), Lactobionic Acid (105ppm), Pentylene Glycol, Vaccinium Macrocarpon (Cranberry) Fruit Extract, Lavandula Angustifolia (Lavender) Extract, Ocimum Basilicum (Basil) Leaf Extract, Syringa Vulgaris (Lilac) Extract, Houttuynia Cordata Extract, Angelica Keiskei Extract, Althaea Officinalis Root Extract, Aloe Barbadensis Leaf Extract, Phragmites Communis Extract, Portulaca Oleracea Extract, Corchorus Olitorius Leaf Extract, Psidium Guajava Fruit Extract, Melia Azadirachta Flower Extract, Melia Azadirachta Leaf Extract, Moringa Oleifera Seed Oil, Theobroma Cacao (Cocoa) Seed Extract, Curcuma Longa (Turmeric) Root Extract, Ocimum Sanctum Leaf Extract, Corallina Officinalis Extract, Calendula Officinalis Flower Extract, Hydrogenated Lecithin, Cetearyl Olivate, Sorbitan Olivate, Carbomer, Arginine, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Xanthan Gum, Sclerotium Gum, Algin, Adenosine, Benzyl Glycol, Ethylhexylglycerin, Tocopherol, Raspberry Ketone, Mentha Piperita (Peppermint) Oil, Pelargonium Graveolens Flower Oil, Citrus Aurantium Dulcis (Orange) Peel Oil, Disodium EDTA
Where it fits in your routine
ROUTINEShake well before use. Apply after toner as your treatment step. Can be used AM & PM, but always follow with sunscreen in the morning. Best results when paired with the full Some By Mi 30 Days Miracle line.
How to use
HOW TO USEShake the Bottle
This is a bi-phase serum with an oil layer and a serum layer. Shake well before each use to combine the two phases for optimal efficacy.
Dispense 3–4 Drops
After cleansing and toning, use the dropper to apply 3–4 drops onto your palm or directly onto your cheeks and forehead.
Pat Gently Into Skin
Spread evenly across face and neck, then gently pat with fingertips to aid absorption. Avoid rubbing to minimize irritation.
Follow With Moisturizer & SPF
Lock in the serum with a moisturizer. In the morning, always finish with sunscreen SPF 30+ as acids increase sun sensitivity.
Who is it for?
WHOPerfect for you if:
- You have acne-prone or oily skin and want gentle daily exfoliation
- You struggle with clogged pores, blackheads, or rough texture
- You want to fade post-acne marks and hyperpigmentation
- You prefer a multi-acid approach that is gentler than pure AHA peels
- You have combination skin and need oil control without over-drying
- You want a soothing serum that treats and calms at the same time
Consider alternatives if:
- You have fungal acne (malassezia) — contains known triggers
- You are pregnant or breastfeeding — contains AHAs and natural BHA
- You have extremely dry skin and need heavy hydration
- You are sensitive to alcohol (denat.) in skincare
- You want high-concentration single-acid exfoliation for faster results
- You are allergic to essential oils (contains peppermint, geranium, orange peel oil)
Skin type compatibility
SKIN TYPESBHA unclogs pores, tea tree controls sebum, and the lightweight bi-phase formula absorbs quickly without adding shine.
Balances oily T-zone and drier cheeks effectively. The oil-serum bi-phase format delivers hydration where needed while controlling shine.
The AHA/BHA/PHA trio tackles acne from multiple angles — clearing pores, killing bacteria, and speeding cell turnover to prevent new breakouts.
Very low acid concentrations and high centella content make it gentler than most exfoliating serums. Patch test first — essential oils may irritate very reactive skin.
The oil phase provides some nourishment, but the alcohol content and exfoliating acids may be drying. Layer with a rich moisturizer and use every other day.
Results timeline
WEEKS 6–8Initial Smoothing & Calming
Skin feels smoother to the touch. Centella and tea tree begin calming active inflammation and redness. Slight tingling is normal for the first few applications.
65% noticed smoother texturePore Clearing & Brightness Boost
AHA/BHA/PHA exfoliation ramps up. Blackheads begin to loosen, skin looks brighter, and minor breakouts may occur as pores purge. Texture becomes visibly refined.
70% noticed brighter skinVisible Acne Reduction & Even Tone
This is the milestone the product is named for. Most users report significantly fewer breakouts, faded post-acne marks, and a more even, radiant complexion.
75% noticed fewer breakoutsLong-Term Skin Transformation
With continued use, acne scars continue to fade, pores appear smaller, and overall skin health improves as the barrier strengthens. Skin looks clearer and more resilient.
80% reported overall improvementRatings by platform
19K+ REVIEWSPros & cons
BALANCEDPraised
- Triple acid exfoliation is gentle enough for daily use without irritation
- High concentration of centella (14.5%) provides excellent soothing and scar healing
- Noticeably smoother, brighter skin within the first 2 weeks
- Effective at reducing active breakouts and preventing new ones
- Affordable K-beauty price point for a multi-active serum
- Free from 20 types of potentially harmful ingredients
- Absorbs quickly and layers well under moisturizer and sunscreen
Criticized
- Bi-phase oily texture may feel heavy for very oily skin types
- Contains essential oils (peppermint, geranium, orange) that may irritate sensitive skin
- Contains alcohol (denat.) which can be drying for compromised barriers
- Small 50ml bottle may not last a full month with twice-daily use
- Acid concentrations are very low — may disappoint those wanting intensive exfoliation
- Not fungal acne safe due to oils and esters in the formula
- Herbal tea tree scent is polarizing — some love it, some find it too strong
Budget-friendly alternatives (dupes)
DUPESContains AHA (glycolic acid) and BHA (betaine salicylate) in a watery toner format. Simpler formula without the centella or tea tree, but effective for gentle daily exfoliation at a lower price. Better for fungal acne-prone skin.
Far more potent exfoliation (30% AHA + 2% BHA) but used only as a 10-minute weekly mask, not daily. No soothing centella or tea tree. Best for those wanting intense, occasional peeling at a fraction of the price.
Korean serum focused on BHA (salicylic acid) for pore clearing and acne control. Lacks the triple-acid approach and high centella content, but may be better for oily skin specifically targeting blackheads.
Comparison with competitors
SIDE-BY-SIDEStorage & shelf life
12 MONTHS12 months after opening
Store in a cool, dry place away from direct sunlight and heat. Keep cap tightly sealed. Ideal temperature: 15–25°C (59–77°F).
Dark green glass dropper bottle that protects light-sensitive ingredients and allows precise dispensing of 3–4 drops per use.
Yes — 50ml is under the 100ml carry-on liquid limit. Compact dropper bottle fits easily in a toiletry bag.
Frequently asked questions
FAQUse with caution. This serum contains glycolic acid, lactic acid, malic acid, and wintergreen leaf extract (a natural source of salicylic acid/BHA). While the concentrations are extremely low (measured in parts per billion), most dermatologists and OB-GYNs recommend avoiding AHAs and BHAs during pregnancy and breastfeeding as a precaution. Consult your healthcare provider before use. Safer alternatives during pregnancy include pure centella or niacinamide serums without exfoliating acids.
No, this serum is not fungal acne safe. It contains several known malassezia triggers including Cetyl Ethylhexanoate (an ester), Caprylic/Capric Triglyceride (fractionated coconut oil), and Olea Europaea (Olive) Fruit Oil. If you have pityrosporum folliculitis (fungal acne), consider fungal acne-safe alternatives like the COSRX BHA Blackhead Power Liquid or the Some By Mi 30 Days Miracle Toner, which does not contain these triggers.
It is best to avoid layering this serum with other strong actives in the same routine. Using retinol, vitamin C (L-ascorbic acid), or additional AHA/BHA exfoliants at the same time can over-exfoliate and compromise your skin barrier, leading to irritation, redness, and peeling. Instead, alternate them — for example, use this serum in the evening and vitamin C in the morning, or use retinol on nights you skip this serum. If you must combine, introduce gradually and monitor your skin closely.
This serum is best suited for oily, combination, and acne-prone skin types. The triple-acid complex helps control excess sebum, clear clogged pores, and prevent breakouts, while the high centella content soothes inflammation. It is also suitable for sensitive skin thanks to the very low acid concentrations and pH 5.5 formulation, though a patch test is recommended. Those with very dry skin may find the alcohol content drying and should pair it with a rich moisturizer.
Most users report noticeable improvements within 2–4 weeks of consistent use. In the first week, skin typically feels smoother and calmer. By weeks 2–3, skin brightness improves and pores begin to clear. The product is named "30 Days Miracle" because the brand targets visible acne reduction and skin transformation by the one-month mark. However, deeper concerns like acne scars and hyperpigmentation may take 6–8 weeks for significant fading. Individual results vary based on skin type and severity of concerns.
Apply this serum as step 3 in your routine, after cleansing and toning but before moisturizer. Shake well, dispense 3–4 drops, and pat gently into skin. In the morning, follow with sunscreen (SPF 30+). It can be used both morning and evening, but if you are new to acids, start with evening-only application and gradually increase frequency. Do not use with other exfoliating products in the same routine.
The serum has a low comedogenic rating of 1/5 and has passed non-comedogenic testing. While it does contain olive oil (which can be moderately comedogenic on its own), the overall formula is lightweight and designed for acne-prone skin. The exfoliating acids actively work to keep pores clear, counteracting any potential pore-clogging effects. Most users with oily and acne-prone skin report no pore congestion issues. However, if your skin is particularly reactive to oils, patch test first.
The Period After Opening (PAO) is 12 months. The 50ml dropper bottle typically lasts 4–6 weeks with twice-daily use (3–4 drops per application), or up to 2 months with once-daily use. Store in a cool, dry place away from direct sunlight to maintain potency. The dark glass bottle helps protect the active ingredients from light degradation. If the color, texture, or scent changes significantly, discontinue use even if within the 12-month window.
Verdict: The Some By Mi AHA BHA PHA 30 Days Miracle Serum is a solid all-in-one treatment for acne-prone and oily skin. Its strength lies in the combination of gentle triple-acid exfoliation with a high concentration of soothing centella asiatica (14.5%) and antibacterial tea tree — treating breakouts while calming the skin rather than aggravating it. However, the acid concentrations are in the ppb range, making this a mild daily maintenance product rather than an intensive exfoliant. It is not suitable for fungal acne sufferers due to oils and esters in the formula, and the essential oils may be a concern for very sensitive skin. At its price point, it delivers excellent value for anyone seeking a gentle, multi-tasking K-beauty serum that addresses acne, texture, and dullness simultaneously.
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Quick Product Notes
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We help you identify key notable ingredients that have been shown to help with effects such as acne-fighting, brightening, UV-protection, wound healing & anti-aging to help you achieve your skincare goals smarter. Please note that different notable ingredients have varying levels of research behind them, some are extremely well proven yet some have mixed research in their efficacy.
Just because a product doesn't contain any notable ingredients doesn't mean it's bad. And a product with notable ingredients (or even many) doesn't necessarily guarantee the efficacy of the product performing these effects either. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine this.
Be smart and use this as just a starting point for you to make more informed and smarter choices and compare it with reviews to see if the product is right for you
Notable Effects & Ingredients
Why are some products great for some people and horrible for others? Well everyone has different skin types and different reactions to the same ingredients.
We've identified a range of ingredients that are commonly regarded as potentially good or bad for those with Dry, Oily/Acne-Prone or Sensitive skin.
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One of the best ways to use this section is to troubleshoot products you've had bad experiences with in the past. Check if it contains any of the marked ingredients to point out suspect ingredients to avoid in the future!
Ingredients Related to Skin Types
Ingredient Safety Breakdown refers to the percentage % of ingredients in different risk categories as classified by EWG (Environment Working Group) if they are available. There are almost endless cosmetic ingredients and they are one of the few organisations globally that have assigned ratings to a lot of the more commonly used ingredients which is why we reference them.
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