Last update Sept. 5, 2021

Hair straighteners

High Risk

Poorly safe. Evaluate carefully. Use safer alternative or interrupt breastfeeding 3 to 7 T ½ (elimination half-lives). Read the Comment.

Some smoothing products contain formaldehyde or glutaraldehyde (see specific info), especially the keratin smoothing or Brazilian Hair Straightening. Formaldehyde and glutaraldehyde have mutagenic properties and are potentially carcinogenic. Its use has been limited in many countries.

Other straightening products, such as sodium hydroxide, lithium hydroxide, calcium hydroxide or ammonium thioglycolate, used in the so-called Japanese Straightening, are not mutagenic and hence considered safe.

It is recommended to limit its use, avoid products containing formaldehyde, meet the safety standards for use that appear in containers, keep clean the chest area and wear short hair or tied hair to prevent the absorption of potentially toxic compounds by the infant.

Hairdressing's workers are more exposed and must strictly enforce safety rules (gloves wearing and time limitation, etc.) along with the use of legally approved products.


See below the information of these related products:

  • Formaldehyde ( Poorly safe. Evaluate carefully. Use safer alternative or interrupt breastfeeding 3 to 7 T ½ (elimination half-lives). Read the Comment.)
  • Glutaral (Moderately safe. Probably compatible. Mild risk possible. Follow up recommended. Read the Comment.)

Suggestions made at e-lactancia are done by APILAM team of health professionals, and are based on updated scientific publications. It is not intended to replace the relationship you have with your doctor but to compound it. The pharmaceutical industry contraindicates breastfeeding, mistakenly and without scientific reasons, in most of the drug data sheets.

Jose Maria Paricio, Founder & President of APILAM/e-Lactancia

Your contribution is essential for this service to continue to exist. We need the generosity of people like you who believe in the benefits of breastfeeding.

Thank you for helping to protect and promote breastfeeding.

José María Paricio, founder of e-lactancia.

Group

Hair straighteners belongs to this group or family:

References

  1. White AJ, Gregoire AM, Taylor KW, Eberle C, Gaston S, O'Brien KM, Jackson CL, Sandler DP. Adolescent use of hair dyes, straighteners and perms in relation to breast cancer risk. Int J Cancer. 2021 May 1;148(9):2255-2263. Abstract
  2. Thomas ZM, Jamiolkowski D, Chantraine S, Steveling-Klein E, Hofmeier KS, Hartmann K. Contact dermatitis to hair cosmetics: Current diagnostic recommendations. J Dtsch Dermatol Ges. 2021 Aug 24. Abstract
  3. White AJ, Sandler DP, Gaston SA, Jackson CL, M O'Brien K. Use of hair products in relation to ovarian cancer risk. Carcinogenesis. 2021 Jun 26. pii: bgab056. Abstract
  4. Mitler A, Houri S, Shriber L, Dalal I, Kaidar-Ronat M. Recent use of formaldehyde-'free' hair straightening product and severe acute kidney injury. Clin Kidney J. 2021 Jan 11;14(5):1469-1471. Abstract
  5. ABA - Australian Breastfeeding Association. Beauty treatments and breastfeeding. None 2021 Full text (link to original source) Full text (in our servers)
  6. Eberle CE, Sandler DP, Taylor KW, White AJ. Hair dye and chemical straightener use and breast cancer risk in a large US population of black and white women. Int J Cancer. 2020 Jul 15;147(2):383-391. Abstract
  7. Aglan MA, Mansour GN. Hair straightening products and the risk of occupational formaldehyde exposure in hairstylists. Drug Chem Toxicol. 2020 Sep;43(5):488-495. Abstract
  8. Ahmed HM, Rashad SH, Ismail W. Acute Kidney Injury Following Usage of Formaldehyde-Free Hair Straightening Products. Iran J Kidney Dis. 2019 Mar;13(2):129-131. Abstract
  9. Pexe ME, Marcante A, Luz MS, Fernandes PHM, Neto FC, Sato APS, Olympio KPK. Hairdressers are exposed to high concentrations of formaldehyde during the hair straightening procedure. Environ Sci Pollut Res Int. 2019 Sep;26(26):27319-27329. Abstract
  10. Dahlgren JG, Talbott PJ. Asthma from hair straightening treatment containing formaldehyde: Two cases and a review of the literature. Toxicol Ind Health. 2018 Apr;34(4):262-269. Abstract
  11. Peteffi GP, Antunes MV, Carrer C, Valandro ET, Santos S, Glaeser J, Mattos L, da Silva LB, Linden R. Environmental and biological monitoring of occupational formaldehyde exposure resulting from the use of products for hair straightening. Environ Sci Pollut Res Int. 2016 Abstract
  12. Gavazzoni Dias MF. Hair cosmetics: an overview. Int J Trichology. 2015 Abstract Full text (link to original source) Full text (in our servers)
  13. Maneli MH, Smith P, Khumalo NP. Elevated formaldehyde concentration in "Brazilian keratin type" hair-straightening products: a cross-sectional study. J Am Acad Dermatol. 2014 Abstract
  14. Van Lerberghe L, Baeck M. A case of acute contact dermatitis induced by formaldehyde in hair-straightening products. Contact Dermatitis. 2014 Abstract
  15. Weathersby C, McMichael A. Brazilian keratin hair treatment: a review. J Cosmet Dermatol. 2013 Abstract
  16. Monakhova YB, Kuballa T, Mildau G, Kratz E, Keck-Wilhelm A, Tschiersch C, Lachenmeier DW. Formaldehyde in hair straightening products: rapid ¹H NMR determination and risk assessment. Int J Cosmet Sci. 2013 Abstract
  17. Couto AC, Ferreira JD, Rosa AC, Pombo-de-Oliveira MS, Koifman S; Brazilian Collaborative Study Group of Infant Acute Leukemia. Pregnancy, maternal exposure to hair dyes and hair straightening cosmetics, and early age leukemia. Chem Biol Interact. 2013 Abstract Full text (link to original source) Full text (in our servers)
  18. Pierce JS, Abelmann A, Spicer LJ, Adams RE, Glynn ME, Neier K, Finley BL, Gaffney SH. Characterization of formaldehyde exposure resulting from the use of four professional hair straightening products. J Occup Environ Hyg. 2011 Abstract
  19. Mazzei JL, Figueiredo EV, da Veiga LJ, Aiub CA, Guimarães PI, Felzenszwalb I. Mutagenic risks induced by homemade hair straightening creams with high formaldehyde content. J Appl Toxicol. 2010 Abstract
  20. Galiotte MP, Kohler P, Mussi G, Gattás GJ. Assessment of occupational genotoxic risk among Brazilian hairdressers. Ann Occup Hyg. 2008 Abstract

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