I use the serum right after my LumiCure session every night. Honestly the difference is night and day — my nail started clearing up way faster once I added this. The tea tree smell is strong but in a good, clean way. Can't believe it was free.

Wasn't expecting much from a freebie but this serum is actually legit. It absorbs fast, doesn't leave residue, and I swear my stubborn big toe fungus started fading quicker once I started applying it after the blue light. Would've paid $15 for this easily.

I've spent $30+ on antifungal serums from Amazon that did nothing. This one actually works because the urea softens the nail first so the ingredients get in. Using it with the device is the combo that finally fixed my nails after years. Best freebie I've ever gotten.