One thing? Don't use your head as a lab. If you want to experiment with the color outcome, use shed hair. Save all your sheds, make little balls and test your "concoctions". That's what people do here, many of us who use or have used henna!
It's called strand testing, and it saves your hair; because even henna is a dye, and can roughen up the cuticle (I had that happen), making it more porous.
3x henna a month is a lot!
ETA/ Oh man, how could I forget? Welcome!!!
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