How many days should onion juice be used for hair?

In this article, we will answer the question “How many days should onion juice be used for hair?”, and what are the benefits of using onion juice for hair?

How many days should onion juice be used for hair?

Using onion juice for the scalp daily twice will show signs of hair regrowth after about 2 weeks. In some people, the effects might take as long as 6 weeks to appear. It is recommended to use onion juice daily for best results of at least twice a week. 

If you have sensitive skin or you are particularly allergic to onions, avoid using onion juice altogether to keep it on your scalp for short periods. 

To test if you are sensitive to onion juice or not, do a patch test as a precaution. Apply a small amount of onion juice to your inner elbow or back of the ear. If irritation or redness develops, do not use it for the scalp. Read on if you want to know how to use onion juice to target your specific hair-related problem.

What are the benefits of using onion juice for hair?

It encourages hair growth

A study conducted in 2018 proved the hair growth ability of onion juice when they mixed the onion extract in shampoos and cleansers. The shampoo with the onion juice was allowed to stay on the scalp a bit longer yet it did not irritate the scalp. 

Instead, it helped in hair growth, moisturized, and reinvigorated dry hair and scalp by nourishing hair follicles to the maximum. You extract onion juice using a muslin cloth from chopped onions at home. Mix it in your shampoo and add some lemon to avoid the pungent smell of onions.

Dietary sulfur 

The hair growth properties of onion juice have been attributed to its high dietary sulfur content. Sulfur is an important mineral in the production of essential enzymes and proteins. Sulfur is also a part of keratin protein. Sulfur nourishes the hair follicles and helps them grow.

Prevents the greying of hair

The catalase enzyme present in onions has excellent anti-oxidant properties. It reduces the levels of hydrogen peroxide levels around the hair roots which is responsible for depriving the hair of its pigments resulting in greying.

Mix 3 tbsp of onion juice with 2 tsp of lemon juice. Dab this mixture onto your skin using cotton or use a spray bottle instead. Keep it in your hair for at least 30 minutes and do this remedy 3-4 times every week until the hair starts to get better. Massage and rinse with a mild shampoo.

Reinvigorates dry and brittle hair

Kaempferol and quercetin; the flavanoids present in onion juice have anti-oxidant, anti-inflammatory, and excellent vasodilatory properties. They increase the blood circulation in the scalp and moisturize your damaged and dry hair.

Treats dry and itchy scalp

The proven anti-inflammatory properties of onion juice are the perfect weapon to calm and soothe your dry and itchy scalp. 

  1. Mix 2 tbsp onion juice/extract with ½ tbsp of pure honey. 
  2. Alternatively, mix olive oil and onion juice in a 1:3 ratio. 
  3. Another way is to combine 3tbsp onion juice with 5tsp of pure coconut oil and 1tsp lime juice to cut the strong onion odor.

Use any of these combinations and leave them on your scalp for at least 30 minutes. Rinse and wash with a mild shampoo afterward.

Other FAQs about Onions which you may be interested in.

How to skin an onion?

Can you boil onions?

What can I substitute for onion powder?

Cures Alopecia

Onion juice can be used to get rid of Alopecia areata. This scalp disease results in the formation of dry scalp areas that speed up hair loss. It might even lead to baldness. A controlled experiment showed onion juice can miraculously promote hair growth after 6 weeks of usage in patients with alopecia.

Prevents dandruff

Dandruff is caused by the growth of the fungus; Malassezia furfur. The excellent antimicrobial and anti-fungal properties of onion juice can be used to combat dandruff, especially in winters.

Use the following remedies to use onion juice for your dandruff.

  • Soak 2 tbsp ground fenugreek seeds in 2 tbsp onion juice and water until it forms a paste. Apply the paste to your scalp for at least 30.
  • Mixing 2 tbsp aloe vera gel with 3 tbsp onion juice. Apply it to your scalp for 10 minutes before.

Wash and rinse your hair with a mild shampoo. To get rid of the strong smell of the onions, add 2 tbsp of apple cider vinegar to 1 cup of water and use this mixture for the final rinse.


In this article, we answered the question “How many days should onion juice be used for hair?”, and what are the benefits of using onion juice for hair?


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