Mandelic acid has a long history of use in the medical community as an antibacterial, particularly in the treatment of urinary tract infections. It has also been used as an oral antibiotic, and as a component of chemical face peels analogous to other alpha hydroxy acids.
In addition to its melanin-inhibiting and micro-exfoliating properties, mandelic acid is anti-bacterial, anti-fungal, and anti-inflammatory. It clears dead skin cells, kills bacteria, reduces redness and inflammation, and helps to diminish the appearance of acne scars. Mandelic acid has benefits for aging skin as well.
Mandelic acid is well tolerated by nearly all skin types. ... Depending on how your skin reacts to AHAs, this product can be used daily. If sensitivity occurs (redness, stinging, breakouts), cut back to every other day.