Biba De Sousa Mandelic Meta Serum in Beauty: NA. Biba De Sousa Mandelic Meta Serum in Beauty: NA. The Mandelic Meta Serum is designed for anyone who desires gentle exfoliation or is dealing with breakouts, pigmentation, or dull, uneven skin - and wants real results without irritation.. Vegan and cruelty-free Free of parabens, sulfates, silicone, and fragrance. Dissolves dead skin cells, minimizes pores, and improves skin texture. Deep hydration and plumpness. 1 oz. Apply the Mandelic Meta Serum 1-2 times per week at night, after cleansing and before moisturizer.. As your skin adjusts, you may gradually increase to every other night or nightly use, depending on your skin's response.. BIDE-WU16. 3002001.