For sensitive or irritated skin, niacinamide serums are recommended as they're potent yet gentle. Niacinamide enhances blemish control and brightening effects when combined with red light therapy. This versatile ingredient reduces inflammation while improving overall skin tone and texture during treatment sessions. https://stcroixproducts.com/products/peptide-blast-pre-treatment-serum-advanced-skin-prep-with-peptides-actives