Skip to content

Malic acid for hair: what effect acidification has on the structure of hair & why you should try

You probably already know that recently acids are used to care for the skin. Now this care product, which may make some newcomers shy away at first, is also spreading to the hair. Acid is supposed to be a real miracle cure in the fight against brittle, dry and dull hair and act against brittle tips and weakened hair. Among other things, it is malic acid for hair. And who still frowns, it should be said that now even many care and styling products contain the acid – without you have suspected or paid attention.

How does malic acid work for the hair?

Malic acid for the hair - Why acidifying is a good idea.

How can acid, which is actually corrosive, be good for the hair? The secret is that it is able to balance the pH of the scalp and hair. And indeed, the hair has an acidic pH. But since most care and styling products are alkaline (basic), they upset this value – they raise it. As you know, especially hair dyes attack the hair.

Fruit acids improve the pH of the hair.

You can counteract this with malic acid for hair, because it is acidic and helps to rebuild and strengthen the hair by penetrating particularly deep into the hair. The agent repairs fractures between the amino acids in the hair fibers by attaching to them – like building blocks, so to speak. Hair becomes shinier again and frizz is reduced. Hair colors in turn become more intense and last longer.

Malic acid for hair makes hair smoother and shinier.

Here’s how acid works in summary:

  • Closes the cuticle. This makes the hair smoother.
  • The hair is less unruly and easier to comb through and style.
  • Works against electrifying the hair.
  • Intensifies hair color after hair coloring.
  • Is a natural and effective sunscreen for the hair.
  • Protects against oxidative stress.
  • The hair will be shinier.
  • The hair becomes softer.

By the way, not only malic acid can do this. Mandelic acid, amino acid and even lactic acid also have a positive effect on the hair structure.

The care product "malic acid" – application and tips

Malic acid for hair to repair brittle hair


How often you use malic acid for hair depends on your needs and care routines. While a single application per week is recommended as a guide, in some cases, however, it may be beneficial to perform hair acidification more often. For example, many women apply this type of regimen after every hair wash, as it helps close hair cuticles and smooth hair. However, what is right for you also depends on the hair structure and especially on the product you use:

Malic acid for hair protects against oxidative stress such as UV radiation.

The lower the pH of the product you use, the less often you should use it. At a value of 4 or 5, you may use it more often. Also, be sure to observe your hair’s reaction to the treatment to determine the optimal frequency. You apply the acid rinse after shampooing, it is the last step and is not washed out again.

Make your own acid rinse

Make your own acid rinse with apple cider vinegar as a nourishing hair conditioner.


  • Vinegar-lemon: 1 liter of water with 1 spoon of splash vinegar and 1 spoon of fresh lemon juice; the strongest pH and best for colored hair; not more often than once every 2 weeks.
  • Malic acid for hair: 1 liter with 2 spoons of high quality apple cider vinegar; possible after every hair wash
  • With beer: mix water and beer in the ratio 1:1; pH 4-5; once a week possible.
  • Coffee rinse: brew 2-3 spoons of freshly ground coffee in 1 liter of water, cool, strain; suitable for light acidification; may slightly discolor the hair.

The acidity of DIY products is best tested with litmus paper.

Care colored hair with acid and intensify the color.