7 benefits of onions to help in hair growth

Table of Contents

Benefits of onions for hair

Hair loss is a recurring feature for many and the focus has shifted to hair growth using various products to arrest hair fall or improve hair growth. Amidst searching for chemical bound products for the hair, we often overlook one of the powerful hair growth agents from our kitchens- Onions! Explore the 7 benefits of onions to help in hair growth.

Onions are a rich source of Sulphur. Sulphur is a key ingredient in amino acids which boost keratin and the maintenance of collagen, in hair. Collagen is the skin structure that binds the hair follicle. And Keratin is a protein that builds the health of your hair. 95% of your hair is Keratin. Collagen are present in most parts of our body as they constitute the proteins which is the tissue that makes up our hair, nails, skin, internal organs and the like in our body.

benefits of onions for hair growth

Benefits of onion to help in hair growth

Onions are a rich source of flavonoids which have antioxidant, antibacterial and anti-inflammatory properties.  When consumed, onions have a host of health benefits including prevention of cancer, lowering cholesterol, fighting infections, protecting cellular activity, prevention of Alzheimer’s.

The elements in onions promote anti-aging, enabling great hair, improved skin, healthier nails, healthier bones and improved internal organs functioning.

Benefits of onion juice on hair and scalp

Research and studies have been conducted to understand the power of onions in enabling hair growth in people having alopecia areata. Alopecia areata is a scalp condition which is identified as hair loss in bald patches on the scalp.In a study, when a group of participants topically applied onion juice to their scalp twice a day, everyday for 2-3 weeks, they started seeing visible results sooner than expected.

7 benefits of Onions to help in hair growth

Benefit Details
Hair Growth Onions, being rich in sulphur add Keratin and strengthen collagen in the hair follicles. Keratin and Collagen improve hair structure and hair regeneration.
Scalp stimulation The high sulphur content in onion juice, stimulates the scalp and increases blood circulation on scalp which strengthens and boosts hair growth
Reduction in hair loss Hair thinning or hair fall is reduced drastically with onion juice topical application, on account of the nourishment from onions vitamins and minerals.
Stronger Hair Follicle The amino acids boost the collagen and strengthen the hair follicles which bind the hair bonds.
Anti-Bacterial Onions have antibacterial capabilities. Onion juice fights bacterial infections(if any) on scalp, due to their anti-bacterial properties.
Anti-dandruff Onion aids in reduction of dandruff on the scalp. And even more powerful, when applied on scalp in combination with lemon juice.
Anti-oxidant Onions have antioxidant properties. The antioxidant natures fights off free radicals that cause damage to hair follicles. And antioxidants delay premature greying of hair
Benefits: Applying Onion juice for hair growth

Benefits of onion to help in hair growth

How to make onion juice for topical application on hair/scalp?

Take 2-3 onions depending on the length of your hair and grind it into a pulp using a blender.

If you have more time on hand, take the pulp and use it as it is by applying it on the hair and scalp. This may take longer to wash off but is effective.

If time is limited, then drain out the pulp using a strainer and use only juice. Applying only juice will be less messier and will be easier to wash off.

How to store onion juice?

After making onion juice, store it in a container or a spray bottle and refrigerate it.

spray bottle for storing onion juice

Spray bottles are easily available in any supermarket. Spraying onion juice helps in even and hassle free topical application on hair, scalp.

The juice should NOT be stored for more than 3-4 days.

For best results, it is ideal to make fresh juice, as and when required and apply it immediately to the hair.

Steps to apply onion juice on hair and scalp:

Items required

  • Spray bottle (for onion juice to be stored in)
  • Cotton swab
  • Shoulder cover
  • Shower cap
  • Tissue papers

Steps to apply

  • Take hair into partitions and keep separate to see the scalp.
  • Slowly start spray the onion juice on to the scalp and let it sink in.
  • Massage with fingers, now and then.
  • After covering the entire scalp, spray onion juice directly along the length of the hair.
  • Clip up or bun up the hair and then, use a shower cap and cover head.
  • Let it dry for 20-30 minutes. During this time, you may feel warm heat emanating out of the scalp, this is the scalp being stimulated.
  • If time permits, soak up the cotton swab with some more onion juice and dab on scalp areas which dried up. Let it dry for another 10-15 minutes.
  • Rinse with plain water, thoroughly and dry the hair. You may use a mild shampoo after a day, to get rid of the smell.
  • If the onion juice smell is too pungent and you would like to get rid of the smell, use a mild shampoo to lather and wash off the smell.

Make use of the tissue papers to wipe the dripping onion juice from the scalp sides. And make sure you have a shoulder cover (either a cloth or a disposable sheet) to avoid onion stains on your clothing.

How often can we apply onion juice to the hair

Application of onion juice everyday can be done depending on your requirement and tolerance levels for the pungent smell of onion, tolerance of your scalp skin.

On an average, 2-3 days per week should do the magic and to start seeing results of hair growth, along with shiny, healthy hair.

How long does it take for onion juice to show hair regrowth?

Research indicates that onion juice application can be done, at least once every 2 days, for a duration of minimum of 4 weeks or more. If applied diligently, it normally takes about 1 month and more to start seeing results of hair regrowth.

What precautions need to be taken before applying onion juice?

Due to the high sulphur content of onions, it is advisable to do a patch test on your arm skin.

Apply fresh onion juice on a 2 inch width area on arm skin and let it stay on until dry.

Observe if there are any signs of extreme burning or continued itching or redness of skin.

While some of us could be allergic to onions, even those who are non-allergic to onions could see such redness or burning signs(continued signs), on topical application of the onion juice.

If you observe continuous burning or itching or redness, then stop usage or minimize frequency of application.

What if onion juice is not showing any signs of hair regrowth?

Hair loss can happen due to many reasons.

  • Hormonal imbalances

  • Thyroid issues

  • Alopecia

  • Stress

  • Lack of vitamins or iron deficiency

  • Genetic reasons or hereditary reasons

  • Infections on scalp

  • Side effects of some medicines

If topical application of onion juice is not showing results even after 2-3 months of care, then it is recommended to consult a doctor to understand the underlying root cause of hair fall. Often in such cases, hair fall could only be one of the indicators of the root cause.

Hence it is important to get a thorough medical check-up and take medical advice to get to the bottom of it, beyond addressing only the symptom.

Often caring for the health of one’s hair extends into the health of the body. Read more for healthy lifestyle tips, which highlights a holistic view on our lifestyle.

How to use onion juice on scalp when redness or itching is present ?

Due to the sensitive nature of some people’s scalp skin, redness or itching/burning may be experienced on the topical application of onion juice/pulp. Nevertheless, one can minimize the burning or redness by using the onion juice in combination with a mix of another essential oil or plant juice or pulp.

Rice water and Onion juice

Rice water and onion juice

Rice water is a powerhouse with essential nutrients required for the hair such as magnesium, niacin, iron, vitamin E and several other minerals which promote healthy hair growth. Fermented rice water, i.e., rice water soaked overnight mixed with onion juice can be applied on hair/scalp and washed off after 30-45 minutes. Women from China, Japan and Asia have been using this method for centuries.

Coconut oil and Onion juice

Coconut oil with onion juice for hair growth

Coconut oil with Onion juice

Coconut oil has been used for centuries for different uses right from moisturizing the skin, using it as a chemical free make-up remover and nourishing hair. It is packed with zinc, iron, vitamin E, lauric acid and antioxidants. Coconut oil alone can nourish hair from the root, but when used in combination with onion juice, healthy growth of hair can be achieved.  

Aloe vera and Onion juice

Aloe vera with onion juice for hair growth

Aloe Vera with Onion juice

Aloe vera is a super plant food that is well-known for its nutrients and multi-purpose uses. It is known for its vitamins, amino acids (vital for hair growth) , B12, zinc and copper and other essential enzymes. It aids in prevention of hair loss and arresting hair fall.

When used in combination with onion juice, fresh Aloe vera pulp can do wonders for the hair, right from soothing the scalp to nourishing, moisturizing the hair follicles and scalp to promoting hair growth.

Castor oil and Onion juice

Castor oil with onion juice for hair growth

Castor Oil with Onion juice

Castor oil has been used for centuries due to its dense nourishing properties. Topically applied on hair and on skin, this oil has essential fatty acids required for nourishing hair follicles and is high in retaining the moisture in protein substances such as hair. It is high in vitamin E as well.

As per recent research  on applying castor oil directly on the eye brows, distinct hair growth was visibly noticed for some participants. If castor oil could do this magic on eye brow hair follicles, one can understand the benefits castor oil offers in hair growth and in strengthening hair follicles.

Please note if the redness or burning or itching persist despite combining with any of the above mentioned combinations, you may discontinue use or application of onion juice on your scalp or hair. And consult a doctor for exploring alternate options or treatments.

Instructions on Redness or burning or Itching due to onion juice

One of the best DIY home remedies to treat hair loss

Research articles



https://pubs.acs.org/doi/10.1021/acs.jafc.9b07418    (antioxidant and anti-neuroinflammatory capacities in onions)




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