Red and reddish hair contains two pigments - pheomelanin (red pigment) and eumelanin (brown pigment). Your body creates these two pigments using different cells. Unfortunately, it's chemically impossible right now to create two different pigments at the same time within the same Hairprint formula.
We don't know if there will ever be a red Hairprint formula, but it is something we continue to investigate and consider.
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