Question
Great question. The problem is there is no perfect scientific study of hGreat question. The problem is there is no perfect scientific study of hair dye use in pregnancy and outcomes for babies.
Answer
Great question. The problem is there is no perfect scientific study of hair dye use in
pregnancy and outcomes for babies. There are animal studies that show no harmful effects in rats and mice pups that are exposed in utero. Furthermore, the amount of chemical that gets absorbed through the bloodstream is very small. That is a long-winded way to say I wouldn't worry about it. There is probably 10 times more "bad chemical" exposure driving through a busy city amongst car exhaust and secondhand smoke!
Will dying your hair chemically or straightening it make you feel better? Go ahead and do it. If you are still nervous despite my arguments outlined above, wait until you are beyond 12 to 14 weeks gestation, when most organs are formed. As for vegetable dyes that contain no chemicals: Use them whenever you need the color but just can't feel comfortable with the chemicals.