In clinical testing, FutureIQ™ serum was most effective in participants presenting with up to 30% grey. That is because FutureIQ™ serum is designed to work on hair with some melanin (pigment) present. For 100% white hair (no melanin present), there is no pigment to act on, and therefore, it can not reverse or re-pigment white hair.
You can reference the attached chart to learn your percentage of grey hair.
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