Talk to Gynecologist on Dye In Pregnancy

AOA Meri sister ki pregnancy ka strt hai r un ko hair dye karnay hutay hai as un k almost saray hair hi white hai due to premature hair whiting. tu un ko har month hair dye karnay hutay hai tu kindly ap bata sakti hai k wo organic tarikay se hair dye kar lay like natural henna with amla or coffee or indigo. ya koi r alternative hai tu wo b bata den thanks in advance plz guide