Best Serums to Use With Red Light Therapy (Water-Based vs Oil-Based) — USA Expert Guide The best serums to use with red light therapy are formulas that fit your skin and your device’s directions. No cosmetic serum is universally required to activate red light or guarantee stronger results. If your mask requires clean, dry skin, … Continue reading Best Serums to Use With Red Light Therapy (Water-Based vs Oil-Based) — USA Expert Guide