Can Onion Juice Help With Hair Regrowth? What Science Says About This Natural Remedy
by M. Anis Ul Hassan on Dec 08, 2025
Hair loss is a concern shared by millions, and with so many treatments on the market, it’s no wonder people are turning to natural remedies in search of effective, affordable solutions. One surprising ingredient gaining attention is onion juice — yes, the same onion you cook with. But does it actually work?
Research suggests it just might.
What a Dermatology Study Revealed
A study published in the Journal of Dermatology explored the effects of onion juice on individuals with alopecia areata, a type of patchy hair loss. Here’s what researchers found:
Participants applied onion juice twice a day.
New hair growth appeared within just 2 weeks for many.
After 8 weeks, almost 87% experienced significant regrowth.
In comparison, the control group saw only 13% regrowth.
These results highlight onion juice as a surprisingly powerful natural option for supporting hair growth.
What This Means for Hair Loss Sufferers
While the study focused on patchy hair loss—not male pattern baldness—it still offers exciting insight. Its success suggests that compounds found in onions may stimulate hair follicles and improve scalp health.
Researchers believe the benefits may come from:
Sulfur-rich compounds that promote collagen production
Antioxidants that reduce inflammation
Antimicrobial properties that support a healthier scalp environment
Although more research is needed, experts agree the early findings make onion juice an intriguing candidate for future hair restoration therapies.
How to Try Onion Juice at Home
If you’re curious and want to give it a try, here’s a simple approach:
Blend or grate a fresh onion and strain out the juice.
Apply it directly to your scalp.
Leave it on for 15–30 minutes, then rinse thoroughly.
Repeat daily or several times per week.
Tip: Mixing a few drops of essential oil (like lavender or rosemary) can help reduce the scent.
Should You Use Onion Juice for Hair Growth?
Onion juice isn’t a miracle cure, and results will vary — especially for different types of hair loss. But for many, it offers a low-cost, natural, and science-backed option worth exploring.
If you're seeking gentler, more holistic ways to support hair regrowth, onion juice might be the unexpected hero your routine has been missing.
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