For many women, hair coloring is an integral part of their self-care routine. However, pregnancy brings a host of questions about the safety of various cosmetic procedures. One common concern is whether it's safe to bleach hair during pregnancy. While research is limited, the available evidence suggests that bleaching hair during pregnancy is generally considered safe, particularly after the first trimester, as long as certain precautions are taken.
The primary reason for the lack of definitive data on hair dye and bleaching during pregnancy is the ethical and practical challenges of conducting clinical trials on pregnant women. As Dr. Salena Zanotti points out, pregnant women are typically excluded from studies due to concerns about potentially exposing the fetus to harm. However, anecdotal evidence and expert opinions suggest that the risk is minimal. "We don’t have much data on the safety of hair dyes during pregnancy," Dr. Zanotti says. "But we do know that your skin is a strong barrier. Only minimal traces of the chemicals in hair dyes get absorbed into the body if you have a healthy scalp."
Most research indicates that dyeing or coloring hair while pregnant is safe. Although permanent and semi-permanent hair dyes contain chemicals that could be harmful in very high doses, the amount absorbed into the bloodstream through the scalp is minimal. Sherry Ross, MD, an ob-gyn and women’s sexual health expert, confirms that research shows hair dye generally doesn’t harm a developing baby.
While bleaching hair during pregnancy is generally considered safe, it’s essential to take precautions to minimize any potential risks:
The first trimester is a critical period for fetal development, with major organs forming. To be cautious, many doctors recommend waiting until at least week 13 of pregnancy before bleaching or dyeing hair. Helen Reavey, a celebrity hair stylist and founder of haircare brand Act+Acre, also recommends avoiding hair dyes during the first 13 weeks.
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Techniques like highlights, lowlights, balayage, streaking, and frosting minimize contact with the scalp. These methods apply the dye to strands of hair rather than the entire scalp, reducing potential absorption.
Select hair dyes that are ammonia-free, peroxide-free, or formulated for sensitive skin. Some women may prefer henna- or vegetable-based dyes, which are considered natural alternatives. If unsure, consult with a stylist about the chemical components of different coloring products.
Semi-permanent and permanent dyes contain more chemicals than temporary dyes. For those concerned about chemical exposure, temporary dyes offer a safer option for special occasions.
If you have eczema, psoriasis, or other skin conditions, consult your healthcare provider before coloring your hair. These conditions can cause breaks in the skin, potentially increasing sensitivity and absorption of chemicals.
Hair dyes often have strong odors that can be particularly bothersome during pregnancy. Coloring your hair in a well-ventilated area can help minimize nausea, headaches, and exposure to chemicals in the air.
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Skin can be more sensitive during pregnancy, so always wear gloves when applying hair dye to protect your hands from irritation and staining.
Always do a strand test before dyeing your hair, even if you’ve used the product before. Pregnancy can change how your hair reacts to dye. If you are having your hair colored at the hairdressers, tell them you are pregnant and ask for a patch test, even if it’s a dye that they’ve used on your hair previously.
Regardless of whether you color your hair at home or in a salon, follow the Food and Drug Administration (FDA) guidelines for dyeing and bleaching hair.
Similar to pregnancy, there is limited research on the impact of hair dye on breast milk. However, current evidence suggests that hair dye is unlikely to get into breast milk if used as directed, posing minimal risk to the baby. Dr. Zanotti states that it is safe to color your hair while breastfeeding but advises keeping the baby out of the room during the process to avoid irritation from the smells.
Research on the effects of perms and relaxers on fetal development is limited. A 2022 study found a correlation between hair straightening products and uterine cancer, but more research is needed to confirm this relationship. The study did not find a correlation between perm solutions and cancer. Some women find that relaxers are less effective during pregnancy. If you choose to have your hair straightened, ensure the salon has good ventilation practices.
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Hairstylists spend extended periods on their feet and are exposed to chemicals daily. Pregnant hairstylists should take breaks, sit when possible, and stay hydrated. Wearing gloves and a mask can help reduce exposure to chemicals.
If you’re concerned about using chemical dyes during pregnancy, consider these alternatives:
Hormonal changes during pregnancy can affect how hair reacts to dye, leading to unpredictable results. A stylist familiar with working on pregnant women can help manage these changes.
There is no definitive answer as to whether coloring hair at home or in a salon is safer. Home dyeing allows control over the products used, while salons offer professional application and better control in avoiding the scalp.
Following FDA safety guidelines, it is generally considered safe to dye your hair every six to eight weeks during pregnancy.
If you prefer to avoid dyeing your hair during pregnancy but want to maintain your current color, consider these tips:
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