6 Impressive Onion Juice Benefits for Hair

Health Insurance Plans starting at Rs.15/day*

Health Insurance Plans starting at Rs.15/day*


Hair problems are universal. Everyone naturally wants healthy, beautiful hair, which is considered the crowning glory. However, balding, hair thinning and dandruff are frequent issues that people have to deal with for several reasons, including pollution, lifestyle choices, and age.

All the hair issues result in unhealthy, short hair. Dodge the worries as we have one of the most powerful ingredients for hair—Onion juice. This simple component effectively treats hair loss and hair thinning.

Though the strong, pungent scent of onions is a turn-off, onion juice is beneficial and a natural cure for hair issues. 

Why is onion juice healthy for hair? 

Onion juice and oil have become extremely popular when it comes to preventing hair loss and promoting hair growth. The presence of Sulphur is to be lauded for the benefits it offers. It is this component that promotes hair growth due to its anti-inflammatory and antioxidant characteristics.

Sulphur is said to be present in the protein keratin, which makes up the hair. Using onion juice on the hair and scalp may provide additional Sulphur to maintain strong, thick hair, thereby preventing hair loss and promoting hair growth.

Onion juice boosts hair growth by increasing the antioxidant enzyme catalase. 

Regular usage nourishes dry hair and stimulates hair follicles, reducing hair loss and improving hair growth due to their Sulphur content.

Onion juice helps prevent environmental damage because it is an excellent source of antioxidants. This indicates that frequently rubbing the scalp with onion juice will stop and delay hair greying.

Onion juice’s antimicrobial properties prevent scalp infections and promote healthy hair growth. Regularly applying onion juice on the scalp is a great method to see a noticeable decrease in hair fall.

Benefits of onion juice for hair 

Prevents hair loss 

The Sulphur content in onion juice helps prevent hair loss. Collagen, which promotes the growth of new hair follicles, is produced with the help of Sulphur.

Nourishes dry hair 

The micronutrients in onion juice help repair and strengthen weak and damaged hair. It has anti-inflammatory and antioxidant properties that play a role in boosting blood flow to the hair roots.

Control dandruff 

Dandruff treatment is one of the main benefits of onion for hair. Applying onion juice inhibits the growth of the fungus and bacteria that cause dandruff because of its antibacterial and antifungal properties. 

Due to this, onion juice is recommended as an effective disease treatment by several natural health authorities. 

The fungus Malassezia furfur is the cause of dandruff in many people. Hence the antifungal properties of onions could be useful in the fight against dandruff.

Treats dry scalp 

Onions’ anti-inflammatory properties help soothe itching scalps. Using onion juice enhances blood flow to the epidermis, which adds to the hydration of the scalp.

Prevents hair greying 

Catalase, an antioxidant found in onion juice, aids in reducing hydrogen peroxide at the hair roots. Lowering the amount of hydrogen peroxide in the hair can delay or even stop hair ageing.

Treats Alopecia 

Alopecia areata is a condition where patients experience patchy hair loss. Onion juice can effectively treat alopecia. 

Onion juice can offer more Sulphur to the hair and scalp to promote strong, thick hair, reducing hair loss and boosting hair growth. 

The Sulphur in onion may also boost the formation of collagen. In turn, collagen promotes the formation of healthy skin cells and hair.

The best alternative for onion juice 

Genetics play a large role in hair loss. Hair density is largely based on genes inherited from the parents, with the exception of diseases and hormone imbalances.

The best alternative for onion juice would be diet. Focusing on getting adequate nutrition by avoiding processed foods and choosing a diet high in protein, vitamins and minerals. 

Noting that a Mediterranean diet and foods high in protein may be helpful for preventing hair loss.

Onion juice hair packs 

Onion juice and potato 

  • In a bowl, mix equal quantities of onion and potato juice. Whisk the mixture well, forming a smooth combination as the potato contains starch.
  • Apply the mixture to the entire scalp and gently massage in a circular motion. 
  • Massage the mixture into the scalp for around 10 minutes and let it sit for 15 minutes.
  • Wash the hair completely with a gentle shampoo. 

Potato juice is incredibly good for the hair as it is rich in minerals like zinc, iron, niacin, and vitamins B and C. Potato juice nourishes the hair follicles from the inside, promoting healthy hair growth when combined with onion juice. 

Onion juice and egg 

  • An egg, onion juice and a few drops of essential oil are all required to prepare the hair mask. 
  • Mix together the egg, onion juice and essential oil. Apply the mixture to the entire scalp and hair.
  • Leave the mixture on the hair for 20 to 30 minutes. Wash the hair with a gentle, sulphate-free shampoo. 
  • Use the mask once to twice a week.

Castor oil and onion juice 

This hair mask requires two tablespoons of castor oil and onion juice.

  • Combine castor oil and onion juice to form a mixture. 
  • Apply this to the scalp and give it a gentle, circular massage.
  • Leave this oil on the hair for about an hour.
  • Wash the hair with a gentle shampoo.

One of the most common treatments for accelerating hair growth is castor oil. Animal studies have demonstrated that it keeps the hair healthy and thickens it. Castor oil reduces hair loss and more hair volume when combined with onion juice.

Olive oil and onion juice 

To prepare the hair mask, take three tablespoons of onion juice with half the quantity of olive oil

  • Mix olive oil and onion juice to form a mixture. 
  • Apply this mixture to the scalp and gently massage it in a circular motion.
  • Leave the oil on the hair for at least 2 hours. 
  • Then, wash the hair with a gentle shampoo. 

Olive oil is another component that effectively removes dandruff. The onion juice stimulates hair growth while also conditioning the hair and scalp to leave them with a velvety lustre.

How to apply onion juice on hair? 

Here is the procedure to apply onion juice to the hair. 

  • Soak a cotton pad with onion juice.
  • Apply onion juice to the scalp using the cotton pad. 
  • Massage the scalp gently for a few minutes after applying the juice.
  • Leave it on for about 15 to 45 minutes on the hair. 
  • Use a shampoo to wash the hair.

How often to use onion on your hair? 

Use onion juice a couple of times per week to get the best results from this treatment.

Side effects of using onion juice 

Burning and itching

Using onion juice is known to cause itching scalp as it contains high sulphur.

Hair loss and irritation

Overusing onion juice can worsen dandruff, dry skin and inflammation, contributing to hair loss.


Applying onion juice to the scalp might cause topical scalp eczema in people with sensitive skin.

Allergic reactions

Hives and skin rashes could result from onion juice.


Onion juice or water is a well-known remedy to enhance the health of the scalp and improve the overall appearance of the hair. The practice has its roots in Ayurvedic traditions.

There is not enough scientific data to support the use of onion remedies for scalp and hair problems, though some claim that they help alleviate dandruff, prevent hair loss and increase lustre. 

Consult a dermatologist or trichologist before attempting the remedy because not all hair issues can benefit from it. 


Does onion help in hair growth? 

Yes, onions promote hair growth. Onion juice contains sulphur, which helps with hair follicle rejuvenation and is an essential component of proteins or amino acids. Antioxidants can also help fight free radicals and promote the growth of damaged hair when applied directly to the scalp.

Can I apply onion juice on oiled hair? 

Onion juice can be used on mildly oiled hair. Using onion oil in a moderate or even slightly reduced proportion has advantages. After evenly applying oil over the area, massage the scalp. Apply onion juice to the hair after oiling it, let it sit for about a half-hour to an hour, and then shampoo it.

How to make onion juice? 

Peel, chop and blend the onions. Use a muslin cloth to filter the juice. 

How to remove the onion smell from the hair? 

To remove the onion odour from the hair, use a fragrant clarifying shampoo, an ACV (apple cider vinegar) rinse, or a lemon-water solution to rinse hair. We may also add a few drops of tea tree and witch hazel essential oils to the hair cleanser.

Can I leave the onion juice in my hair overnight?

It is not advised to leave the onion juice in the hair overnight for beginners. People who have tried the remedy can leave it overnight. Spread out a towel to prevent getting the mixture on the pillows.


The Information including but not limited to text, graphics, images and other material contained on this blog are intended for education and awareness only. No material on this blog is intended to be a substitute for professional medical help including diagnosis or treatment. It is always advisable to consult medical professional before relying on the content. Neither the Author nor Star Health and Allied Insurance Co. Ltd accepts any responsibility for any potential risk to any visitor/reader.

Scroll to Top