Henna doesn’t expire or go bad, it goes stale. It’s like a spice going stale in that as it gets older, a spice will eventually lose some or all of its potency. With henna, as it gets stale it will loose some or all of its dye potency.
Fresh henna powder smells like fresh cut spinach and is an earthy green or khaki color. Bright green powder may have chemical dye added; this is often just a food coloring and can be safe. If the powder is brown and has little or no scent, it may be stale and too old to yield… Read More »