Onion shampoo: everything you need to know

Onion shampoo is a product of natural origin that concentrates beneficial nutrients for the hair. It is believed to stimulate growth, reduce hair loss, and revitalize dry-looking strands. Do you dare to try it?

Last update: June 07, 2021

Right now, onion shampoo is one of the most popular hair products on the market. Due to its composition, it is an ideal complement to reduce the problems of excessive fall, dryness and breakage, among other hair alterations. It is effective? Is there evidence?

Although it may seem surprising, the onion has shown interesting properties for hair health. Its content of flavonoids, vitamins, minerals and other phytochemicals make it a good option to complement your beauty routine. This time we tell you everything you need to know about the shampoo made with this ingredient. Keep reading!

Onion shampoo benefits

When it comes to caring for hair health, there is no specific product that is 100% effective. Keep in mind that capillary alterations depend on many factors, such as nutrition, health status, drug consumption, among others. Therefore, it should be clarified that onion shampoo is not a miracle formula.

To date, the evidence on its effects is limited and more research is required to corroborate its efficacy. Still, anecdotal data and small studies suggest that it may be helpful in fighting alopecia, dandruff, and dry hair. Let's see in detail.

There are different methods that are recommended to stop hair loss. Although there is evidence in favor of onion, it should not be considered a magical product.

Also read: 3 homemade shampoos for every hair type

Hair growth

A study released through Journal of Drug Delivery and Therapeutics determined that onion is helpful in promoting healthy hair growth. In particular, its extracts added in a coconut, castor and eucalyptus shampoo provided the following benefits:

  • Strand growth stimulation.
  • Nutrition of hair follicles.
  • Hydrated hair strands and scalp.

Hydration and revitalization

The nutrients contained in the onion are useful to restore the healthy appearance of dry and brittle hair. As an article in Life Science Journal, contains flavonoids such as kampeferol and quercetin, that act as antioxidants and anti-inflammatories.

These substances not only minimize the negative impact of free radicals on the hair, but also promote blood flow and the transport of nutrients. The result? A more hydrated and silky hair.

Decrease in excessive fall

In addition to stimulating hair growth, onion shampoo seems to be an aid against excess hair loss. Regarding this, a small investigation in The Journal of Dermatology concluded that onion juice has potential as a treatment for alopecia. However, more evidence is needed.

Dandruff control

Onion-based remedies have been a widely used supplement to combat dandruff. Antifungal and antimicrobial properties are attributed, which could explain this benefit.

Through the magazine Phytotherapy, a study concludes that onion has promising effects against fungal-associated diseases. Especially in front of Malassezia furfur, which causes dandruff.

How to prepare onion shampoo?

On the market there is a wide variety of presentations of onion shampoo. Even so, there is a simple method to make it at home. Below we detail the ingredients and the step by step.


  • 1 medium red onion.
  • 350 milliliters of shampoo (brand of preference).


  1. First, make sure to get a heavy perfume shampoo that camouflages the aroma of the onion.
  2. Once you have it, chop the onion into small pieces and put them inside the shampoo bottle.
  3. Close the boat shake for a few seconds and let it rest in a cool dark place for 10 or 15 days.
  4. After the recommended time, filter the shampoo and start using it.

Application mode

  • Take the equivalent of a tablespoon of shampoo and apply it all over the hair and scalp. Let it act for 5 to 8 minutes while you massage.
  • Repeat its application 2 or 3 times a week for about 3 months.
  • Then let the hair rest for 1 month and repeat the treatment.
It is recommended to apply this shampoo for 3 months and then rest for another month. You then resume the cycle.

It may interest you: Dry shampoo, benefits and how to use it

Recommendations for using onion shampoo

The application of this shampoo can be irritating to people with sensitive scalps. Therefore, Before using it in its entirety, perform a small test. If there are no unwanted reactions, use it without problems. On the contrary, if you notice allergy or irritation, rinse instantly and discontinue use.

On the other hand, avoid using this product if you have diseases of the scalp. If so, it is best to consult a dermatologist to determine which substances are safe. The professional will evaluate whether or not it is good to use this type of shampoo.