While hair removal creams, also called depilatories, are a great temporary hair removal solution, they don't remove hair for a longer period when compared to other common hair removal methods like waxing and sugaring. This is because Nair doesn't grab the hair by the root. Instead, hair removal creams disintegrate the hair into a "jelly-like substance," per Byrdie. Once that hair is weakened, a simple wipe will reveal smooth, hairless skin.
That said, the lasting power of Nair really depends on your hair growth cycle and how fast it typically grows. Generally speaking, you can expect for it to last anywhere from a few days to a few weeks. According to the brand itself, its hair remover cream "lasts days longer than shaving" with a standard razor. Plus, it won't leave behind any annoying stubble or bumps. If you find that your hair grows pretty fast and you need to shave often to keep your hair away, chances are, you may need to use Nair weekly (via Healthline).
Some sources, like Vogue, claim that Nair only lasts a few days. If you fit that category, it's important to note that Nair recommends waiting at least 72 hours after using the cream before reapplying it to avoid irritating your skin.
