The Mandelic Acid Serum is a focused exfoliating and clarifying treatment, ideal for active acne and congestion. FF3 BioPeptide AHA is the natural progression, combining a lower-strength mandelic acid with the full FF3 peptide system, DMAE, low molecular weight hyaluronic acid, and Pseudoalteromonas Ferment for a more comprehensive anti-aging, brightening, and firming result. It is a great fit for clients whose acne is not super serious, or for those who have cleared their acne and are ready to shift focus toward anti-aging while keeping a lighter percentage of mandelic acid in their routine.