Principia
Mix-01 Serum, Niacinamide + Glycolic, Tranexamic & Salicylic Acids
Mix-01 Serum, Niacinamide + Glycolic, Tranexamic & Salicylic Acids
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- Who it's for
- For oily, combination and blemish-prone skin with blackheads, visible pores, uneven texture or a dull look, suitable for all skin types.
- Key ingredients
- Niacinamide 5%, Glycolic acid 4%, Tranexamic acid 3%, Salicylic acid 2%
- How to use
- On clean, dry skin, dispense a few drops onto your fingertips without touching the dropper to the skin.
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- Authentic, from Brazil
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About this product
Mix-01 Serum, Niacinamide + Glycolic, Tranexamic & Salicylic Acids
Four actives in one renewing serum for oily, blemish-prone skin: 5% niacinamide, 4% glycolic acid, 3% tranexamic acid and 2% salicylic acid help clear blackheads, keep oil in check and smooth texture, and with continued use skin looks firmer, fresher and more radiant.
Principia is a Brazilian skincare brand built on clear, concentrated formulas: every product names its actives and their percentages on the front of the pack, with the pH printed alongside, so you know exactly what you are putting on your skin.
Glycolic acid renews the skin's surface and salicylic acid works inside the pore, helping clear blackheads and excess oil; niacinamide helps balance oil and supports a smoother-looking complexion, while tranexamic acid helps even out the look of tone. A light, fragrance-free serum at pH 3.5 to 4.0. In a consumer test after 60 days, 97% saw fewer blackheads, 97% softer skin, 97% more radiance and 91% less oiliness.
Why you'll love it
- Helps clear blackheads and blemishes
- Helps keep oil and shine in check
- Smoother, softer, firmer-looking skin
- Fresher, more radiant complexion
Key ingredients
- Niacinamide 5% – a stable form of vitamin B3 that helps balance oil and supports a smoother, more even-looking complexion.
- Glycolic acid 4% – a small-molecule AHA that renews the skin surface, reduces the build-up of dead cells and helps keep pores clear.
- Tranexamic acid 3% – helps even out the look of skin tone, including marks left by past blemishes.
- Salicylic acid 2% – a BHA that exfoliates inside the pore, helping clear blackheads and control oil.
How to use
- On clean, dry skin, dispense a few drops onto your fingertips without touching the dropper to the skin.
- Smooth gently over the face, avoiding the eye area, the eyelids and the corners of the nose and mouth.
- Use on alternate nights, in small amounts, for the first week, then every night. Follow with moisturiser, and use sunscreen every morning.
Who it's for
For oily, combination and blemish-prone skin with blackheads, visible pores, uneven texture or a dull look, suitable for all skin types.
Product details
- Brand: Principia
- Size: 30ml
- Cruelty-free · Dermatologically tested
- Full ingredient list: Aqua, Xanthan Gum, Propanediol, Ethoxydiglycol, Sodium Hyaluronate, Sodium Hydroxide, Niacinamide, Tranexamic Acid, Citric Acid, Glycolic Acid, Salicylic Acid, Benzyl Alcohol, Benzoic Acid, Dehydroacetic Acid, Alcohol. Formulas may be updated by the brand; the list on your pack is the reference.
- Not to be used for children under 3 years of age. Use sunscreen daily; this product may increase sun sensitivity. Avoid the eye area, the eyelids and the corners of the nose and mouth. Do not apply to irritated or broken skin. A temporary tingling, warmth or dryness may be felt during the first applications; if irritation persists, discontinue use. Keep out of reach of children. If contact with the eyes occurs, rinse thoroughly with water.
Frequently asked questions
Can I use it with other actives?
Yes. Apply it on clean skin, then moisturiser. While your skin gets used to it, skip other exfoliating acids, peels or retinol on the same night.
Does it contain fragrance or alcohol?
It is fragrance-free. Alcohol appears at the very end of the list, in a small amount. It is also free from parabens, silicones and gluten.
Can I use it during pregnancy?
Speak to your doctor before using an acid serum during pregnancy or while breastfeeding.
Shipping, duties & returns
Tracked DHL shipping from Brazil, 15–20 business days. All import duties and taxes are paid by us, so there is nothing to pay on delivery. Sealed products can be returned within 14 days.
Disclaimer: For external use only. Patch test before use and discontinue use if irritation occurs. Individual results may vary. Product packaging is labelled in Portuguese; the instructions and ingredient information are on this page, in English. Our products are sourced in Brazil, in the brands' original packaging, and are regularised with ANVISA (Agência Nacional de Vigilância Sanitária), Brazil's national health authority, under the applicable framework for each product category. See our full Disclaimers & Important Information.
