BiON Mandelic Serum is a corrective acid serum that targets acne breakouts, uneven skin tone, and clogged pores through a layered approach to exfoliation and pigment control. At its core, mandelic acid works as both an antibacterial and exfoliant, regulating sebum production, clearing pores, and accelerating cell turnover to reduce the recurrence of breakouts and fade post-inflammatory discoloration. This serum is available in two strengths: an 8% concentration for facial use and a 15% concentration intended for body use only. Both formulas carry a light, citrus-herbal scent from orange peel oil, lemongrass oil, and lavender oil.

Key Benefits

Clears Pores and Reduces Breakouts Mandelic acid's antibacterial properties target acne-causing bacteria at the surface while regulating sebum production to help prevent future breakouts from forming.

Fades Dark Spots and Uneven Tone Mandelic acid and azelaic acid work together to break up pigment clusters caused by sun damage, hormonal changes, and post-inflammatory hyperpigmentation (PIH), visibly evening skin tone over time.

Exfoliates Without Stripping Lactic acid and mandelic acid encourage steady cell turnover and surface exfoliation, helping to smooth texture and reduce the appearance of acne scarring without aggressive irritation.

Calms Inflammation and Redness Niacinamide reinforces the skin barrier and reduces redness associated with active breakouts, working alongside azelaic acid's known anti-inflammatory properties to keep reactive skin more comfortable.

Supports Moisture Retention Sodium hyaluronate, sodium PCA, and witch hazel extract help the skin hold onto hydration during the exfoliation process, with the formulation boosted to support moisture retention by up to 84%.

If you deal with recurring breakouts, oily or congested skin, or stubborn dark spots left behind after acne clears, the 8% BiON Mandelic Serum is built for your concerns. It works equally well for those managing hormonal discoloration or melasma who want an acid serum that addresses pigment and pore health at the same time.

Because mandelic acid has a larger molecular size than many other alpha-hydroxy acids, it absorbs more slowly and tends to be better tolerated by sensitive and darker skin tones, making this a strong option for those who have reacted to stronger acids like glycolic in the past.

The 15% concentration is formulated exclusively for body use, making it well-suited for addressing bacne, body discoloration, or rough, congested skin on areas like the chest, shoulders, or back.

Start with the every-other-day schedule and resist the urge to increase frequency too quickly. Mandelic acid works gradually and steadily, and giving your skin time to acclimate in those first two weeks will minimize initial flaking and set you up for much more consistent results long-term.

Prepare: After cleansing and toning, make sure skin is clean and fully dry before applying.

Apply: Dispense a small amount and spread evenly over the treatment area.

Frequency: Begin every other day for the first two weeks, then transition to once daily or as directed by your esthetician.

Follow: Finish with your preferred moisturizer. If applying in the morning or going outdoors, always follow with a broad-spectrum SPF, as acid exfoliants increase sun sensitivity.