Principia AM-10 Mandelic Acid Serum 10% + Alpha Arbutin 1% for Dark Spot & Oil Control Care, 1.01 fl oz (30 mL)
Principia AM-10 is a Brazilian dermocosmetics night serum designed for visible refinement—supporting clearer-looking pores, smoother texture, and a more even-looking complexion. With 10% mandelic acid (AHA) and 1% alpha arbutin, it offers a polished approach to tone and congestion concerns: gentle resurfacing paired with targeted pigment appearance support.
The result is a modern routine step that feels elegant and intentional, ideal for everyday users, salon retail, and international resellers seeking a globally understood brightening story with clearly stated active concentrations.
Key Benefits
- Dark spot appearance support: Helps reduce the appearance of dark spots and supports a more even-looking tone.
- Oil control: Helps regulate the look of excess sebum for a fresher finish.
- Blemish-prone support: Helps reduce the look of blackheads and blemishes by supporting clearer-looking pores.
- Pore appearance support: Helps minimize the look of enlarged pores as surface buildup is reduced.
- Softness + smooth feel: Helps refine skin texture for a softer, more polished touch.
- Glow enhancement: Helps improve the look of luminosity and overall radiance.
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Dermatologically tested (brand-reported): The brand reports irritation and sensitization testing, plus hypoallergenic / non-photoirritating evaluation.
How to use
Apply on alternate nights for 1 week, then every night as tolerated. Use before creams. With a clean, dry face, dispense a few drops onto fingertips (avoid touching the dropper to skin) and spread gently over the face, including the under-eye area if tolerated.
Do not apply on eyelids, on the outer corners of the nose and mouth, or on irritated/broken skin. Avoid sun exposure during use and wear sunscreen daily.
In a 60-day perceived efficacy study, participants reported improvements in: tone (100%), pore size appearance (100%), softness (100%), glow (100%), oiliness (94%), melasma appearance (93%), under-eye dark circles (93%), and under-eye puffiness (93%). The brand also reports instrumental measurements related to hydration, firmness, and elasticity indicators, plus an image-based analysis showing a reduction in the length of under-eye wrinkle appearance after 30 and 60 days. Results may vary.
Ingredients Highlights
- Mandelic Acid (10%): An AHA derived from bitter almond extract. With a higher molecular weight than some other AHAs, mandelic acid is often associated with a gentler-feeling renewal process. It supports surface exfoliation and cell turnover, helping smooth the look of texture, regulate the look of oiliness, and support pore clarity by reducing surface buildup.
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Alpha Arbutin (1%): A biosynthetic active used to support more even-looking tone by influencing melanin-related processes. Helps reduce the appearance of dark spots and supports a brighter, more uniform complexion (appearance-focused cosmetic claim).
Allergen warnings / cautions
- For external use only. Do not apply on irritated, broken, or compromised skin.
- Avoid eyelids and sensitive facial folds; avoid direct contact with eyes. If contact occurs, rinse thoroughly.
- During the first week, use small amounts on alternate nights; temporary stinging, tingling, or dryness may occur.
- If irritation persists, stop use and seek medical guidance.
- Avoid sun exposure during use; wear broad-spectrum sunscreen daily.
- Keep out of reach of children. Do not use on children.
- Store in a cool, dry place.
- According to the brand, the formula is free from parabens, petrolatum, sulfates, silicones, fragrance, and gluten.
- Pairing note: The brand indicates it can be used with other formulas, with some restrictions—avoid combining with high concentrations of other AHAs in the same routine.
Principia is a Brazilian dermocosmetics brand founded in 2020 in São Paulo with a clear mission: democratize high-performance skincare through science-backed formulas, radical ingredient transparency, and fair, accessible positioning. Instead of relying on hype, Principia focuses on what matters most for results-driven routines—active ingredients at disclosed percentages, straightforward formulations, and a minimalist, clinical aesthetic designed for everyday use.
FAQ
When should I use Principia AM-10?
Use it at night. Start on alternate nights for one week, then increase to nightly use as tolerated.
Do I need sunscreen while using AM-10?
Yes. Daily broad-spectrum sunscreen is essential when using exfoliating acids to help protect the look of tone and results.
Is AM-10 suitable for oily or blemish-prone skin?
It is suitable for all skin types and is often chosen for routines focused on oil control, pore appearance, and the look of blackheads and blemishes.
Can I apply AM-10 around the eyes?
The brand indicates safety and efficacy were evaluated for the eye area. Apply gently, avoid eyelids, and avoid direct contact with eyes.
Can I combine AM-10 with other acids?
The brand notes it can be used with other formulas, but avoid stacking with high concentrations of other AHAs in the same routine to reduce the risk of irritation.
Is Principia cruelty-free?
The brand states it does not test on animals.
Complete your routine by exploring our curated Principia Collection for a clean, balanced, everyday glow.
Add Principia AM-10 to your cart and elevate your night routine with Brazilian dermocosmetic precision.
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