The (18) AHA Serum (18) contains 7% glycolic acid (AHA), 5% gluconolactone (PHA) and 3% succinic acid (dicarboxylic acid), an effective and balanced mixture of mild, exfoliating acids, which is applied after cleansing and/or toning before the other skincare steps. The serum is suitable for all skin types. It has a keratolytic effect, stimulates cell renewal and collagen synthesis, refines the skin texture, moisturises and improves skin structure and firmness for a radiant complexion.
Vegan
PEG Free
Microplastic-, Acrylate and Silicone Free
Unisex
Moor Preservation
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1
+
€ 1 per product for the renaturation of the raised bogs
Benefits
Effective peeling
Removes dead skin cells and promotes cell renewal
Reduces visible signs of aging
Conditions the skin barrier and moisturizes
Free from synthetic fragrances, silicone, microplastics, acrylates, and parabens
Application
The serum is to be applied after cleansing and/or toning before the other skincare steps. To begin with, we recommend evening application, e.g. twice a week. If well-tolerated, the serum can also be applied daily.
Important note: Do not expose yourself directly to the sun or protect yourself from sunlight (hat, clothing, sunscreen). Take care not to apply the serum near the eyes or mucous membranes. If you notice any unusual reddening or irritation of the skin, stop using the product and consult a dermatologist if necessary.
Skin Types
Normal skin
Dry skin
Oily skin
Combination skin
Skin with breakouts
Mature skin
Sensitive skin
Hyperpigmented skin condition
Ingredients (INCI)
Click for more information
Aqua (Water)
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Glycolic Acid
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Gluconolactone
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Pentylene Glycol
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Succinic Acid
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Sodium Hydroxide
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Arginine
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Propanediol
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Allantoin
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Phenoxyethanol
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Xanthan Gum
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Ethylhexylglycerin
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Sodium Polyphosphate
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Cyanocobalamin
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Tocopherol
* Price incl. VAT plus shipping costs
Delivery time: approx. 2–4 working days
Hierbei handelt es sich um vergällten bzw. denaturierten Alkohol (Ethanol, Äthanol, Äthylalkohol), der in kosmetischen Formulierungen adstringierend wirkt, wodurch die Hautoberfläche verdichtet und Poren verkleinert werden. Alcohol Denat. duftet leicht und wirkt antimikrobiell, wodurch das Wachstum von Mikroorganismen gehemmt wird. Zusätzlich fungiert dieser Stoff als Lösungsmittel, Konsistenzgeber und Verminderer von Schaumbildungen. Alkohol kann die Feuchtigkeit und Lipide des Hautschutzmantels binden und so die Funktion einer intakten Barriere herabsetzen. Dies tritt jedoch ausschließlich bei Einsatzkonzentrationen von über 20 % ein, was für die Produkte der Serie Prof. Dr. Steinkraus nicht zutreffend ist.
(18) AHA Serum
€ 102,00 (30 ml)
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1
+
Prof. Dr. Steinkraus is turning 5.
For our birthday, we would love to introduce you to our skincare: Until 8 November 2026, we will add a full-size Hand Cream (75 ml, worth € 26) to every order of € 80 or more.
Please note: as soon as any code is applied to your order, we are unfortunately unable to include a complimentary Hand Cream.
You will receive our (11) Hand Cream for free. It will be automatically added to your package and will not appear in your cart.
For our birthday, we would love to introduce you to our skincare: Until 8 November 2026, we will add a full-size Hand Cream (75 ml, worth € 26) to every order of € 80 or more.
It cannot be combined with other codes or offers.
Please note: as soon as any code is applied to your order, we are unfortunately unable to include a complimentary Hand Cream.