Safety Status:
Trying to Conceive: Safe
Pregnancy: Limited
Breastfeeding: Safe
What We Know: Hair dyes contain various chemicals including aromatic amines, phenols, and hydrogen peroxide. Modern hair dyes have been reformulated to reduce potentially harmful substances compared to earlier formulations.
For individuals trying to conceive, hair dye is generally considered safe. No clinical evidence suggests that hair dye negatively impacts fertility or conception rates. The FDA, which regulates hair dye products, has not identified fertility concerns related to typical consumer use of commercial hair dyes.
During pregnancy, hair dye receives a “Limited” classification primarily due to the precautionary approach recommended by experts. The American College of Obstetricians and Gynecologists (ACOG) acknowledges in their patient education materials that while there is no evidence that hair dye causes birth defects or miscarriages, many healthcare providers recommend waiting until after the first trimester to color hair, when organogenesis is complete. This recommendation is based on theoretical concerns rather than documented adverse outcomes.
Research indicates that systemic absorption of hair dye chemicals through the scalp is minimal, with studies showing less than 1% absorption of applied dyes. Additionally, many modern coloring techniques like highlights, balayage, and ombré involve minimal scalp contact, potentially reducing exposure further. If choosing to dye hair during pregnancy, the CDC recommends ensuring good ventilation, wearing gloves, following package instructions precisely, and not leaving the product on longer than directed.
For breastfeeding individuals, hair dye is considered safe. The minimal systemic absorption of hair dye chemicals makes significant transfer into breast milk highly unlikely. Neither the AAP nor ACOG has identified concerns regarding hair dye use during lactation. The NIH notes that topically applied products with limited systemic absorption generally pose minimal risk to breastfed infants.
Important considerations include potential skin sensitivity changes during pregnancy, which may increase the risk of allergic reactions. A patch test is recommended before application, even if you’ve previously used the same product without issues. Additionally, choosing well-ventilated environments for hair coloring services helps minimize inhalation exposure to chemical fumes.
Sources: American College of Obstetricians and Gynecologists (ACOG) Patient Education Materials, Food and Drug Administration (FDA) Hair Dye Safety Guidelines, Centers for Disease Control and Prevention (CDC) Environmental Exposures During Pregnancy Guidance, National Institutes of Health (NIH) LactMed Database