Hair loss and thinning can be caused by many factors — from stress and hormones to nutritional deficiencies — but nature offers some powerful remedies to support healthier, fuller hair. One of my all-time favorite DIY treatments is onion juice for hair growth.
It may sound intense, but onion juice is rich in sulfur, antioxidants, and antibacterial properties that can help reduce shedding, promote regrowth, and soothe scalp conditions like dandruff. It’s simple, affordable, and surprisingly effective when used consistently.
In this post, I’ll walk you through how to make onion juice, how to use it on your scalp, and a few powerful ingredient combinations to boost its effects.
What You’ll Need
- 1–2 red onions (organic if possible)
- A blender
- A nut milk bag, cheesecloth, or pantyhose
- A squeeze bottle for easy application
How to Make Onion Juice for Hair
- Chop the onion
Use two medium or one large red onion. Smaller red onions are said to have more benefits, but regular red onions work great too. - Blend
Add the chopped onion to a blender. You don’t need water if your blender is strong enough. - Strain the juice
Pour the mixture into a nut milk bag or pantyhose and squeeze out the juice. Discard the pulp. - Store
Transfer the onion juice into a squeeze bottle for easy scalp application. I like to make a fresh batch every time, but you can store leftovers in the fridge for a few days.
How to Use Onion Juice on Your Hair
- Apply the juice directly to your scalp using the squeeze bottle.
- Gently massage it in to stimulate circulation.
- Leave on for about 30 minutes.
- Rinse out with shampoo (try using my DIY Ayurvedic Herbal Shampoo for extra scalp support).
📌 Patch test first if you have sensitive skin — onion juice is potent!
💡 How Often to Use It
Use this treatment 2–3 times per week for at least a few months to see visible results. Natural remedies take time… consistency is key!
Onion Juice Hair Growth Combos
If you’re ready to take things further, here are some powerful ingredients to mix with onion juice:
✅ 1. Onion Juice + Coconut Oil
Coconut oil deeply moisturizes the scalp and helps calm irritation. Combine with onion juice to reduce flakiness while encouraging growth.
✅ 2. Onion Juice + Castor Oil
Castor oil is one of the best-known natural hair growth oils. Mixing it with onion juice creates a thick, nourishing treatment.
✅ 3. Onion Juice + Amla Oil Serum
I love adding a few drops of my favorite organic amla-based scalp serum. It’s full of herbs, oils, and extracts that work synergistically to boost growth and calm the scalp.
✅ 4. Onion Juice + Fenugreek
Soak fenugreek seeds overnight, then:
- Option A: Blend into a paste and mix with onion juice
- Option B: Boil and strain for fenugreek water, then combine with onion juice
Both methods help prevent hair fall and nourish the scalp.
✅ 5. Onion Juice + Flaxseed Gel
This is one of my favorites. Flaxseed gel gives the onion juice a better consistency, makes it easier to apply, and adds shine + moisture to the hair.
(Here’s how I make flaxseed gel if you missed that post!)
✅ 6. Onion Juice + Raw Honey
Raw or manuka honey is incredibly soothing and antibacterial. Combine 1 large spoon of honey with a few spoons of onion juice for a softening scalp mask.
🧖♀️ My Favorite Combo
Honestly? I often mix a few of these ingredients together into one powerhouse mask — like onion juice + flax gel + castor oil. It’s deeply nourishing, easy to apply, and leaves my scalp feeling refreshed and healthy.
Final Thoughts
Onion juice might not smell amazing, but it’s one of the most powerful natural remedies I’ve used for hair growth and scalp health. Be consistent, experiment with what works for your scalp, and remember — sometimes the simplest ingredients give the best results.
Want more DIY hair mask recipes? Check out my Flaxseed gel recipe.
