Best Formaldehyde-Free Hair Relaxers of 2025
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On the hunt for the UK's best formaldehyde-free hair relaxers? We're here to help. We've scoured the market to round up some of the very best formaldehyde-free hair relaxers you can buy, including brands like inokeratin, Laura Sim's, KATIVA, VAUS, Be Natural.
In our top 5 Best Formaldehyde-Free Hair Relaxers, the best one you can get is inokeratin Hair Relaxer in terms of overall performance. All the recommendations are of great value, read on and find the most suitable one!
At a Glance: Our Top Picks
#TOP 1
9.8
#TOP 2
9.7
#TOP 3
9.5
Top 5 Formaldehyde-Free Hair Relaxers
Inokeratin Brazilian Straightening Kit - 2 x 1L
Brazilian Keratin and Brazil Nut Hair Smoothing Kit
Kativa Keratin And Argan Oil Brazilian Straightening Kit Pack 3x150 ml
VAUS | European Hair Straightening Kit
Be Natural - Brazilian Keratimask Straightening Kit
Frequently Asked Questions (FAQs)
1. Do hair relaxers contain formaldehyde?
A hair straightening or smoothing solution is usually applied to human hair followed by a heat treatment that seals the solution in. These products often contain formaldehyde, also known as formalin and methylene glycol. When the solution is heated, the formaldehyde in the products is released into the air as a gas.
2. Can you straighten hair without formaldehyde?
Real-talk time: There's no such thing as a truly chemical-free hair-straightening treatment. For a keratin treatment to give you shiny, straighter, frizz-free hair for months, it must contain formalin or another chemical in the same family.
3. Does all keratin have formaldehyde?
Many (but not all) keratin treatments contain formaldehyde, which can be dangerous if inhaled. Formaldehyde is what actually makes the hair look straighter. According to an Environmental Working Group investigation, some companies will actually try to hide the fact that their keratin product contains the chemical.
During our formaldehyde-free hair relaxer research, we found 7 formaldehyde-free hair relaxer products and shortlisted 5 quality products. We collected and analyzed 2,716 customer reviews through our big data system to write the formaldehyde-free hair relaxers list. We found that most customers choose formaldehyde-free hair relaxers with an average price of £20.23.
The formaldehyde-free hair relaxers are available for purchase. We have researched hundreds of brands and picked the top brands of formaldehyde-free hair relaxers, including inokeratin, Laura Sim's, KATIVA, VAUS, Be Natural. The seller of top 1 product has received honest feedback from 2 consumers with an average rating of 1.0.
Charlotte Powell is a dermatologist and a licensed cosmetologist from Westminster, London. However, she was first a cosmetologist from London Beauty Training School. According to Charlotte, she needed better insight into the human skin, hence the dermatology degree. Long before she acquired her degree, she wrote and edited articles, eBooks, and editorials for companies and websites. Charlotte combines her skill and knowledge in providing DIY Beauty tips amongst other fashion related topics.