The Golden Rule: Keep it clean before, and layer up after.
Your LED mask needs a clear path to reach your cells. Blocking it with heavy products is the most common mistake beginners make.
Remove every trace of SPF and makeup. Pigments in makeup can block the light waves.
A simple thermal water or light hydrating toner is fine, but ensure it absorbs fully.
Avoid strong acids (AHA/BHA) or retinol immediately before. They can make skin sensitive to light.
Now is the time for your potent serums. Your skin circulation is boosted, ready to absorb nutrients.
Use a good quality moisturiser or facial oil to seal in hydration.
If you do your session in the morning, always finish with broad-spectrum sunscreen.