Evo što kaže LLLI:

According to the BREASTFEEDING ANSWER BOOK, published by La Leche League International, no evidence exists that the nursing mother's use of hair-care products, such as hair dyes and permanents, has any effect on her breastfeeding baby. When a mother uses hair-care products, some of the chemicals will be absorbed through her skin. If her scalp is healthy and intact, less will be absorbed than if the skin on her scalp is scratched or abraded.
iliti:

Nije primijećeno da preljevi i boje za kosu imaju ikakav utjecaj na dijete koje doji.
Kada majka koristi prozvode za njegu kose, neke kemikalije će se apsorbirati kroz kožu. Ako je koža vlasišta zdrava i neoštećena, apsorpcija će biti manja nego ako je koža izgrebana i oštećena.