The dual salicylic acid system sets this apart from standard SA cleansers. While most acne cleansers contain only standard salicylic acid, this formula pairs 1.5% SA with Capryloyl Salicylic Acid (LHA) — a L'Oréal-patented lipophilic derivative that penetrates pores at a different rate for two-depth clearance. The formula also bridges Kiehl's apothecary heritage with modern pharmaceutical chemistry, incorporating traditional botanicals (frankincense, witch hazel, ginger) alongside the patented acid technology.
A uniquely formulated dual-acid acne cleanser that paired 1.5% salicylic acid with L'Oréal's patented LHA for two-depth pore clearance, backed by Kiehl's traditional botanical ingredients. Now discontinued, it leaves behind a loyal following and a genuine gap in the acne cleanser market.
The case for it
Cautions: fragrance; known irritants.
Same rule for everyone. “Good choice” is the verdict on 9,564 of 45,024 concern verdicts across the catalog; rule R2r decided 408 of them. Unchanged since September 5, 2026, engine 5.1.1.
Brand or formulator? Disclose a concentration or correct a fact →
The studies behind the evidence row
The case for it
What would change this: The same active in a leave-on form would be judged on its evidence rather than its contact time.
Same rule for everyone. “Supporting role” is the verdict on 8,197 of 45,024 concern verdicts across the catalog; rule R6 decided 2,017 of them. Unchanged since September 5, 2026, engine 5.1.1.
Brand or formulator? Disclose a concentration or correct a fact →
The studies behind the evidence row
The case for it
Same rule for everyone. “Good choice” is the verdict on 9,564 of 45,024 concern verdicts across the catalog; rule R2r decided 408 of them. Unchanged since September 5, 2026, engine 5.1.1.
Brand or formulator? Disclose a concentration or correct a fact →
The studies behind the evidence row
The case for it
What would change this: The same active in a leave-on form would be judged on its evidence rather than its contact time.
Same rule for everyone. “Supporting role” is the verdict on 8,197 of 45,024 concern verdicts across the catalog; rule R6 decided 2,017 of them. Unchanged since September 5, 2026, engine 5.1.1.
Brand or formulator? Disclose a concentration or correct a fact →
The studies behind the evidence row
Does the jobDoes what a cleanser is for: surfactant mildness, rinses clean without stripping. Not measured from the label: pH match to skin.
A verdict is DermApproved’s assessment of how well a product’s ingredients fit a concern — never a claim about what the product treats. Evidence dots and collected reviews sit beside it and are never blended in. Rules 0.5.1 · evidence table ev-2026.09-r228 · how we decide
There is a specific kind of grief reserved for the discontinuation of a skincare product you have used for years. It is irrational, disproportionate, and entirely valid. When Kiehl's quietly shelved the Blue Herbal Acne Cleanser Treatment in late 2024, long-time users — some of whom had been washing their faces with this translucent blue gel for over a decade — responded with the kind of dismay usually reserved for the cancellation of a beloved television show.
The product deserved the loyalty. In a category dominated by identical 2% salicylic acid cleansers, the Blue Herbal Cleanser did something genuinely different: it paired standard salicylic acid at 1.5% with Capryloyl Salicylic Acid, a lipophilic BHA derivative patented by L'Oréal. Standard SA dissolves in water and penetrates pores relatively quickly. LHA dissolves in lipids and penetrates more gradually, providing a slower, sustained exfoliation deeper in the follicle. Using both together creates what amounts to a two-speed pore-clearing system — a fast-acting surface sweep from the SA and a slower, deeper clean from the LHA.
That dual-acid design also answers the most common objection to any acne wash — the belief that a rinse-off salicylic acid cleanser can't work because the acid just washes down the drain. Leave-on BHA does get more contact time, true, but studies have shown that 1.5% salicylic acid in a wash-off format still meaningfully improves acne: the acid partitions into the pores during the wash, and the LHA here was specifically engineered for gradual, sustained follicular penetration even during brief skin contact. A 2006 study in Skin Pharmacology and Physiology demonstrated that LHA achieved acne reduction comparable to adapalene 0.1%, placing it in serious clinical territory for a cosmetic ingredient. This approach was uncommon in OTC acne cleansers when the product launched, and it remained uncommon right up until the day it was discontinued.
The rest of the formula reads like a pharmacist's botanical cabinet. Boswellia serrata extract — frankincense — contributes anti-inflammatory and sebum-regulating properties. Witch hazel water provides astringent oil control, connecting this modern formulation to the original 1964 Blue Astringent Herbal Lotion that started the line. Ginger root extract offers antioxidant support, with boldo leaf and burnet root rounding out the herbal bench. Zinc sulfate and pyridoxine (vitamin B6) add antimicrobial mineral action. Even the cinnamon bark extract, while a potential sensitizer, has documented antibacterial properties relevant to acne treatment.
The sensory experience was polarizing and memorable. Camphor and menthol deliver an unmistakable cooling sensation that some users found invigorating and others found aggressive — and it's worth being clear that this tingle is not a sign the product is 'working.' The actual acne treatment is the SA and LHA quietly exfoliating inside the pores, a process you neither feel nor see. The camphor and menthol offer mild antimicrobial benefit but are, first and foremost, sensory theater. The blue gel lathers into a light, silky foam that rinses clean without stripping, and the herbal-medicinal scent — all from functional ingredients, not added fragrance — declared its intentions clearly: this was not a gentle morning ritual. It was a treatment.
For oily and combination skin, the results were consistent. Users reported clearer pores within two weeks, reduced blackheads within a month, and sustained acne control with continued twice-daily use. The sulfate-free surfactant system (coco-glucoside, sodium cocoyl isethionate, coco-betaine) was gentler than the typical SLS-based acne washes, which allowed the acids to do their work without the surfactants contributing additional barrier damage.
The irritation potential, however, was real. Camphor, menthol, alcohol, T-butyl alcohol, cinnamon bark extract, propylene glycol, and dual salicylic acids in a single cleanser create a formidable irritation load. For sensitive skin, this product was a non-starter. For eczema-prone or rosacea-affected skin, it was actively contraindicated. Even within its target audience of oily, acne-prone skin, some users found the cooling sensation too intense, particularly around the eye area where the skin is thinnest. Between the botanicals and a laminaria extract it also isn't fungal-acne-safe or vegan.
At twenty-nine dollars for five ounces, the Blue Herbal Cleanser offered good value for a prestige acne treatment. The product was economical in use — a small amount generated sufficient lather for a full face wash — and a tube typically lasted three to four months with twice-daily use. As an FDA-registered OTC drug with a genuine active ingredient at a therapeutic concentration, it delivered more clinical credibility than many comparably priced cleansers, and its several hundred reviews, while a smaller pool than a drugstore staple's, skewed positive on exactly that clearing power, with the camphor-menthol intensity the recurring gripe.
The discontinuation is the elephant in the bathroom. Kiehl's has not publicly explained why this product was removed from the lineup. Perhaps it was a portfolio simplification. Perhaps reformulation economics played a role. Perhaps the camphor-menthol-cinnamon combination fell out of favor in an era increasingly focused on gentle, barrier-respecting skincare. Whatever the reason, the product's departure leaves a genuine gap — the dual SA/LHA cleanser concept has not been replicated in the mass market.
For those mourning the Blue Herbal Cleanser, the advice is practical: stockpile if you can find remaining stock, and prepare to transition to alternative salicylic acid cleansers. None will offer the exact dual-acid mechanism, but several effective SA cleansers exist in both drugstore and prestige categories. The Blue Herbal Cleanser was a product that understood acne from both a pharmaceutical and an herbal tradition, and its absence will be felt by the skin it kept clear.
The hero actives that drive this product's performance.
| Ingredient | Function | Evidence |
|---|---|---|
| Salicylic Acid (1.5%) | The primary FDA-registered active ingredient — a BHA that penetrates oil-filled pores to exfoliate dead cells and dissolve the sebum plugs that cause comedones. At 1.5%, it provides effective OTC acne treatment that works synergistically with the LHA in this dual-acid formula. | Regulator-approved for Acne · emerging certainty |
| Capryloyl Salicylic Acid (LHA) | L'Oréal-patented lipophilic BHA derivative that penetrates pores more gradually than standard salicylic acid, providing sustained exfoliation with potentially less irritation. The dual SA/LHA combination is distinctive to this formula, offering two-depth pore clearance. | Regulator-approved for Acne · emerging certainty |
| Witch Hazel Water | Natural astringent that reduces oiliness and tightens pores, echoing the original 1964 Blue Astringent Herbal Lotion's formulation philosophy. Provides immediate oil control alongside the deeper-acting salicylic acids. | Not yet assessed |
| Boswellia Serrata Extract | Frankincense-derived extract with anti-inflammatory and sebum-regulating properties. Supports the anti-acne action of the salicylic acids by calming inflammation and helping to control the excess oil that feeds breakouts. | Not yet assessed |
| Zinc Sulfate | Anti-inflammatory and antibacterial mineral that supports acne-prone skin alongside pyridoxine HCl (vitamin B6). Provides additional antimicrobial action to complement the salicylic acid's pore-clearing mechanism. | Limited for Acne |
Ingredient standings describe the active at treatment-level doses and vehicles; this product's own condition grades weigh its actual formula.
Active Ingredient: Salicylic Acid 1.50%. Inactive Ingredients: Water, Coco-Glucoside, Propylene Glycol, Ammonium Polyacryloyldimethyl Taurate, Glycerin, Coco-Betaine, Sodium Cocoyl Isethionate, Sodium Methyl Cocoyl Taurate, Dipropylene Glycol, Sodium Chloride, Butylene Glycol, Phenoxyethanol, Hydrogenated Coconut Acid, Capryloyl Salicylic Acid, Coconut Acid, T-Butyl Alcohol, Sodium PCA, Camphor, Menthol, Boswellia Serrata Extract, Sodium Isethionate, Hamamelis Virginiana (Witch Hazel) Water, Peumus Boldus Leaf Extract, Disodium EDTA, Alcohol, Zingiber Officinale (Ginger) Root Extract, Sanguisorba Officinalis Root Extract, Cinnamomum Cassia Bark Extract, Xanthan Gum, Laminaria Saccharina Extract, Zinc Sulfate, Pyridoxine HCl, Sodium Hydroxide, Citric Acid
cleanser
AM & PM
Use as your morning and/or evening cleanser on wet skin. Lather gently and rinse thoroughly. Follow with an oil-free moisturizer. Avoid combining with other salicylic acid or BHA products to prevent over-exfoliation. As a rinse-off product, the active ingredients have brief skin contact time.
Immediate clean, refreshed feeling with reduced surface oiliness. Noticeable reduction in blackheads and clogged pores within 1-2 weeks. Consistent acne improvement within 4-6 weeks of twice-daily use.
The Blue Herbal Acne Cleanser Treatment's clinical foundation rests on its 1.5% salicylic acid active ingredient — an FDA-registered acne treatment at a well-established therapeutic concentration. A comprehensive review published in Clinical, Cosmetic and Investigational Dermatology (2015) by Arif documented salicylic acid's comedolytic, anti-inflammatory, and antibacterial properties, confirming its status as a first-line OTC acne treatment.
The addition of Capryloyl Salicylic Acid (LHA) creates a dual-depth exfoliation system not found in standard SA cleansers. LHA's clinical credentials were established in a randomized, double-blind study published in Skin Pharmacology and Physiology (2006) by Saint-Leger et al., which demonstrated that 5% LHA cream achieved acne reduction comparable to 0.1% adapalene gel — a prescription retinoid — positioning LHA as a serious acne-fighting ingredient. In this cleanser, the combination provides both rapid surface-level exfoliation (SA) and slower, sustained deeper-pore penetration (LHA).
A 2013 study in Skin Research and Technology directly examined 1.5% salicylic acid — the exact concentration in this product — and confirmed significant improvement in facial acne with topical application, validating the specific dose used in this formulation.
The supporting botanicals add complementary mechanisms. Boswellia serrata extract contains boswellic acids with documented anti-inflammatory properties that may help reduce acne-related redness and swelling. Zinc sulfate contributes antimicrobial and anti-inflammatory activity — zinc's role in acne management has been supported by multiple clinical studies showing benefit both topically and orally.
Dermatologists recognize salicylic acid at 1.5% as an effective OTC concentration for acne treatment, and the addition of LHA provides a dual-exfoliation approach uncommon in wash-off products. Clinicians would appreciate the sulfate-free surfactant system and the absence of added fragrance. However, dermatologists would caution patients about the significant irritation potential from camphor, menthol, and cinnamon bark — ingredients that create a strong sensory experience but can compromise barrier function in sensitive individuals. For patients with oily, resilient skin and persistent acne, this cleanser represented a well-formulated treatment option in the Kiehl's lineup.
Wet face with lukewarm water. Apply a small amount of the blue gel and work into a gentle lather, avoiding the immediate eye area. Massage for 30-60 seconds to allow the salicylic acid contact time. Rinse thoroughly. Use twice daily — morning and evening. Follow with an oil-free moisturizer. Do not use simultaneously with other topical acne medications without consulting a healthcare provider.
At $29 for 5 fluid ounces, the Blue Herbal Cleanser offered strong value for an FDA OTC drug product from a prestige brand. The dual-acid SA/LHA formula was unique at this price point, and the economical lathering meant each tube lasted 3-4 months — placing the monthly cost under $10. As a now-discontinued product, remaining stock may be found at variable prices through third-party sellers.
Those with oily or combination skin dealing with persistent acne, blackheads, and clogged pores who want a clinically formulated cleanser from a trusted pharmacy brand. Best for skin that can tolerate active ingredients without excessive sensitivity. Note: this product is discontinued, so purchase while stock remains.
Anyone with dry, sensitive, eczema-prone, or rosacea-affected skin. Those who are sensitive to camphor, menthol, or cinnamon should avoid this product entirely. If you prefer gentle, barrier-respecting cleansers, the cooling sensation and acid load here will likely be too much.
Ready to try Kiehl's Blue Herbal Acne Cleanser Treatment?
Buy at Amazon ♥Translucent blue gel that foams into a light, silky lather when worked with water. Medium viscosity with a smooth, non-gritty feel.
Herbal and medicinal — camphor and menthol provide a strong cooling, minty note with ginger and cinnamon undertones. No added synthetic fragrance; all scent comes from functional botanical ingredients.
White squeeze tube with Kiehl's apothecary-style labeling and the signature blue accent consistent with the Blue Herbal line. Clean, pharmacy-inspired design. Available in multiple tube sizes.
A cooling, tingly sensation from the camphor and menthol is immediately noticeable during use. The blue gel lathers into a light foam that rinses clean. Skin feels refreshed, clean, and slightly tightened after the first wash. Mild dryness may occur during the first week as skin adjusts to the dual-acid formula.
3-4 months applied morning and night from the 5 oz tube
All Year
The Blue Herbal line is rooted in one of Kiehl's most iconic products: the Blue Astringent Herbal Lotion, first introduced in 1964. The Acne Cleanser Treatment extended this heritage into an OTC drug-classified acne treatment, combining the brand's traditional botanical approach with modern L'Oréal acid technology. Its discontinuation in late 2024 left a devoted user base searching for alternatives.
Kiehl's was founded in 1851 as an apothecary in New York City and has been owned by L'Oréal since 2000. The Blue Herbal line draws on the legacy of Kiehl's iconic 1964 Blue Astringent Herbal Lotion. This specific cleanser has been discontinued as of late 2024.
The cooling sensation from camphor and menthol means the product is working on acne.
The cooling sensation is a sensory effect, not an indicator of acne-fighting activity. The actual acne treatment comes from the salicylic acid and LHA penetrating pores and exfoliating dead cells — a process that is neither felt nor visible during the wash. Camphor and menthol provide mild antimicrobial benefits but are primarily sensory ingredients.
A rinse-off salicylic acid cleanser is not effective because the acid washes away.
While leave-on BHA products do provide more prolonged contact time, studies have demonstrated that 1.5% salicylic acid in a wash-off format still significantly improves acne. The acid penetrates into pores during the cleansing process, and the LHA in this formula is specifically designed for gradual, sustained pore penetration even during brief skin contact.
Yes — as of late 2024, this product is listed under discontinued products on the Kiehl's official website. Remaining stock may be available through third-party retailers while supplies last. Long-time users may want to explore alternative dual-acid or salicylic acid cleansers.
Salicylic acid in a rinse-off cleanser at 1.5% is generally considered safe during pregnancy per ACOG guidelines, as the brief skin contact time results in minimal systemic absorption. However, consult your healthcare provider before using any medicated skincare during pregnancy.
The FDA drug labeling warns that using another topical acne medication simultaneously increases the risk of skin irritation and dryness. If you want to use benzoyl peroxide, consider alternating — this cleanser in the morning, benzoyl peroxide at night — rather than layering both in the same routine.
The blue color is a deliberate nod to Kiehl's iconic Blue Astringent Herbal Lotion from 1964, connecting this modern acne treatment to the brand's apothecary heritage. The color comes from the formulation rather than from a functional ingredient.
Capryloyl Salicylic Acid (LHA) is a lipophilic derivative of salicylic acid patented by L'Oréal. It penetrates pores more gradually than standard SA, providing sustained exfoliation with potentially less irritation. This cleanser uses both standard SA (1.5%) and LHA together for dual-depth pore clearance — a combination uncommon in OTC acne cleansers.
Recurring themes our editors read across retailer reviews of this product — summaries in our words, not quotations, and not a substitute for your own patch test.
Effectively clears acne and blackheads without over-drying the skin
A little product goes a long way making the bottle last months
Cooling menthol sensation feels refreshing after a long day
Clears blackheads and whiteheads noticeably within weeks
Long-term users report sustained clear skin for years of consistent use
Can be harsh around the delicate eye area during use
Strong herbal menthol scent may irritate the nose and eyes
Camphor and menthol cooling sensation too intense for some users
Product has been discontinued leaving loyal users searching for alternatives
Alcohol and cinnamon bark in the formula may sensitize reactive skin
Verified answers from our questions library — the nuance a product page cannot carry.
