Onion Oil for Hair Growth: Benefits & How to Use

What Is Onion Oil and Why Is It Good for Hair?

Onion oil is exactly what it sounds like — an oil infused with the concentrated goodness of onion extract. It's been used in Indian homes for generations, long before it became a trending ingredient. Your dadi may have rubbed raw onion juice on her scalp and sworn by it. Modern science now backs up what she already knew.

The Science Behind Onion Oil for Hair

Onion oil works primarily because of its high sulfur content. Sulfur is a building block of keratin — the protein your hair is literally made of. When your scalp gets enough sulfur, it produces stronger, thicker strands from the root up.

Research also suggests that onion extract may help improve the hair growth cycle by nourishing hair follicles and reducing oxidative stress on the scalp. One small but widely cited study found that participants who applied onion juice twice daily saw significantly more hair regrowth compared to those who didn't.

Key Active Compounds: Sulfur, Quercetin & Antioxidants

• Sulfur: Supports keratin production and strengthens hair structure

• Quercetin: A powerful antioxidant that may reduce scalp inflammation

• Flavonoids: Help protect follicles from environmental damage — especially relevant in Indian cities with high pollution levels

• Antimicrobial compounds: Naturally combat scalp bacteria and fungal buildup

These aren't fancy lab chemicals. They're naturally occurring in the humble onion sitting in your kitchen right now.

Top Benefits of Onion Oil for Hair Growth

Here's why onion oil deserves a permanent spot in your hair care routine:

• Reduces hair fall: Sulfur strengthens the roots, so strands shed less during washing and combing

• Stimulates scalp circulation: Massaging onion oil into your scalp increases blood flow to follicles, which may encourage faster growth

• Fights dandruff and scalp infections: The natural antimicrobial properties help keep your scalp clean and balanced — a real blessing during India's humid monsoon months

• Adds shine and manageability: Regular oiling coats the hair shaft, reducing frizz and making hair easier to manage

• May delay premature greying: Quercetin's antioxidant action may help protect melanin-producing cells in the follicle

The WOW Skin Science Onion Hair Oil (200 ML) is a ready-to-use option that combines onion extract with a lightweight carrier oil base — great for daily scalp nourishment without the mess of DIY onion juice.

Shop: Onion Hair Oil For Hair Growth Hair Fall Control → →

How to Use Onion Oil for Best Results

Applying oil correctly matters more than most people realise. Slapping it on your lengths and calling it done? That won't cut it.

Step-by-Step Scalp Massage Routine

1. Part your hair into sections so the oil reaches your scalp directly

2. Warm the oil slightly — not hot, just warm. This improves absorption

3. Apply with fingertips directly to the scalp, not just the hair

4. Massage in circular motions for 5–10 minutes — this is the step most people skip, but it's crucial for circulation

5. Work the remaining oil down the lengths with your palms

6. Cover with a warm towel or shower cap to let it penetrate

How Long to Leave Onion Oil In

Leaving it on for at least one hour gives the actives time to work. Overnight application gives even better results — just wrap your hair in a soft cotton cloth to protect your pillow. If the smell is a concern, a one-hour treatment is perfectly effective too.

How Often Should You Apply?

Two to three times a week is the sweet spot. Daily oiling can clog follicles, especially if you have an oily scalp. Stick to consistency rather than frequency — results come from regular use over weeks, not one marathon session.

For an upgraded formula, the WOW Onion & Collagen Hair Oil combines onion extract with collagen for added strength and elasticity. Collagen supports the hair follicle structure, making this a good pick if your hair feels both thin and brittle.

Shop: Onion & Collagen Hair Oil Nourishes and Strengthens → →

Tips to Avoid the Onion Smell

• Add 2–3 drops of lavender or peppermint essential oil to your onion oil before applying

• Follow up with a good sulphate-free shampoo — wash twice if needed

• A diluted apple cider vinegar rinse after shampooing neutralises any lingering odour

• Don't stress — the smell fades quickly once hair dries

Building a Complete Onion Hair Care Routine

Oil alone is a great start. But pairing it with the right products makes a real difference.

• Step 1 – Pre-wash oil treatment: Apply onion oil 1–2 hours before washing. This is your foundation step

• Step 2 – Cleanse with an onion shampoo: Use a shampoo that continues the anti-hairfall work. The WOW Onion & Collagen Anti-Hairfall Shampoo (300 ML, ₹399) is sulfate-free and strengthens roots while cleansing gently

• Step 3 – Condition after every wash: Follow with the WOW Onion & Collagen Anti-Hairfall Conditioner (₹249) to restore softness and seal the cuticle

• Step 4 – Weekly hair mask: Once a week, use the WOW Onion & Collagen Hair Mask as a deep treatment — leave it on for 20 minutes before rinsing

• Step 5 – Daily leave-in protection: On non-oil days, a light spritz of the WOW Hairfall Control Onion Juice Spray (₹399) keeps roots nourished between washes

Consistency is everything. Eight to twelve weeks of this routine is when most people start noticing real change.

Frequently Asked Questions

How long does it take for onion oil to show results?

Most people see a noticeable reduction in hair fall within 4–6 weeks of consistent use. Visible new growth typically appears around the 8–12 week mark. Hair growth is slow by nature — be patient and stay consistent.

Can I use onion oil every day?

Daily use isn't necessary and may actually weigh hair down or clog follicles. Two to three times a week is ideal for most hair types. If your scalp is oily, stick to twice a week.

Does onion oil actually help stop hair fall?

Research suggests it may significantly reduce hair fall, particularly when caused by nutritional deficiency or weak roots. It works best as part of a consistent routine rather than a one-time fix. It is not a medical treatment for conditions like alopecia areata — consult a dermatologist if your hair fall is severe or sudden.

How do I get rid of the onion smell after applying onion oil?

Wash your hair twice with a good shampoo, or follow up with a diluted apple cider vinegar rinse. Adding a few drops of lavender or rose essential oil to your onion oil before applying also helps mask the smell during the treatment itself.

Is onion oil safe for color-treated or chemically processed hair?

Generally, yes. Onion oil is nourishing and shouldn't strip colour. That said, always do a patch test first and check that your chosen formula doesn't contain harsh alcohols or sulfates that might affect your colour. When in doubt, apply mainly to the scalp and avoid saturating the lengths.