If you’ve ever tried onion juice for hair growth, you already know the struggle—the smell is… intense. But here’s the thing: people keep using it because it actually works.
So what if you could get the benefits without walking around smelling like your kitchen? Yes, it’s possible—and I’m going to show you exactly how to do it step by step.
Why Onion Juice Works for Hair Growth

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Let’s break it down in simple terms.
Onions—especially yellow onions—are packed with sulfur. That’s the key ingredient your hair loves.
Here’s what that means for you:
- Helps boost keratin production (stronger hair strands)
- Stimulates hair follicles for faster growth
- Improves scalp health (goodbye dandruff)
- Supports blood circulation to the scalp
And yes… that same sulfur is also why it smells so strong.

Supplies You’ll Need
Keep this simple—you don’t need anything fancy.
- 1 medium yellow onion (strongest and most effective)
- ½ cup water
- Blender
- Strainer or cloth (pantyhose works surprisingly well)
- Spray bottle
- Lemon essential oil
- Lemongrass oil (optional but highly recommended)

Step-by-Step: How to Make Onion Juice (Without the Smell)
Step 1: Chop Your Onion
Peel and chop your onion into small pieces. The smaller, the better for blending.
Step 2: Blend with Water
Add your chopped onion and about ½ cup of water into a blender.
Blend until smooth.
Step 3: Strain the Juice
Use a strainer or cloth to squeeze out the liquid.
You should end up with about ¼ cup of onion juice.
Step 4: Add the Smell-Fighting Oils
This is the game changer.
Add:
- 2–3 drops lemon oil
- 2–3 drops lemongrass oil
These oils:
- Neutralize the strong onion smell
- Help fight dandruff
- Keep your scalp fresh and clean
Step 5: Pour into a Spray Bottle
Transfer your mixture into a spray bottle for easy application.

How to Use Onion Juice on Your Hair
Here’s exactly how to apply it:
- Spray directly onto your scalp and roots
- Gently massage for 2–3 minutes
- Leave it on for about 1 hour
- Wash your hair thoroughly with shampoo
Do this 2–3 times per week for best results.

How to Store It (Without It Going Bad)
Let’s be real—fresh is best.
But if you want to prep ahead:
- Freeze the juice in ice cube trays
- Store in the fridge for up to 3 days
- Always use fresh batches when possible
Real Talk: Does It Actually Work?
Here’s the honest answer.
Onion juice isn’t magic—but it does support healthier hair growth when used consistently.
Most people notice:
- Less shedding
- Thicker-looking hair
- Healthier scalp
But consistency is everything. You won’t see results overnight.

Side Effects You Should Know
Before you jump in, keep this in mind:
- Strong smell (if you skip the oils)
- Possible scalp irritation for sensitive skin
- Can sting if you have cuts or scratches
Quick tip: Do a patch test first.
Pro Tips to Make This Work Even Better
If you want to level this up:
- Use it on clean or slightly damp hair
- Pair with a gentle, sulfate-free shampoo
- Follow with a deep conditioner
- Stay consistent for at least 4–6 weeks
Final Thoughts
Onion juice might not be glamorous—but it’s one of those old-school remedies people keep coming back to for a reason. If you’ve already tried simple DIY treatments like rosemary oil for hair growth or easy at-home scalp care routines, this is a great next step to level up your results.
And now that you know how to actually remove the smell, there’s really no excuse not to try it—especially if you’re looking for another affordable, natural way to boost your hair growth routine.