I have bought this natural hair product in hopes that it will not give me bad reactions as last time when I dyed my hair, using a regular hair dye

This hair dye does not contain ammonium. Here are some of the other ingredients however:

propylene glycol, peg -2 cocamine, cetearyl alcohol, athanolamine, stearic acid, cetrimonium choloride, sodium bisulfate, tetrasodium EDTA...

Ok so it sounds to me like it has some chemicals in it, but this is considered to be an organic hair dye based on plant extracts. I wouldn't worry about dying my hair so much if it wasn't for the fact that mercury poisoining experiencesactually made me go grey (not completely).
I have been literally scared to death from some of the symptoms of the poisoning. Regardless, I'm only 28 years old so my physical appearence matters to me..Just trying to explain why I would even consider dying my hair if I have suffered mercury poisoining.

Any thoughts on this product? Thanks..