What happens when you apply ONION JUICE to your hair twice a week?...
Dr. Eric Berg DC@dr_ericberg
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Jun 06, 2025
~3 min read
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What happens when you apply ONION JUICE to your hair twice a week?
This unusual remedy has quietly gained attention for promoting hair growth—especially with thinning or patchy hair.
But its effectiveness depends on proper use. Here’s what research says—and how to apply it. 🧵
This unusual remedy has quietly gained attention for promoting hair growth—especially with thinning or patchy hair.
But its effectiveness depends on proper use. Here’s what research says—and how to apply it. 🧵
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One common myth? That onion juice smells terrible and doesn’t work.
Yes, onions have a strong smell—but when used correctly, there’s no lingering odor, and the results can be impressive.
But what actually makes onion juice so powerful for hair?
Yes, onions have a strong smell—but when used correctly, there’s no lingering odor, and the results can be impressive.
But what actually makes onion juice so powerful for hair?
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Onions are rich in quercetin and sulfur—two compounds that support hair in key ways:
• Sulfur helps build keratin, the main protein in hair
• Quercetin reduces inflammation
• Natural antimicrobials fight fungus and scalp infections
But most people make one key mistake…
• Sulfur helps build keratin, the main protein in hair
• Quercetin reduces inflammation
• Natural antimicrobials fight fungus and scalp infections
But most people make one key mistake…
0:55
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Most people just blend an onion, strain the juice, and apply it directly.
But that skips a simple step that can significantly boost its effectiveness.
Here’s the right way to use it:
But that skips a simple step that can significantly boost its effectiveness.
Here’s the right way to use it:
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To maximize the benefits of onion juice, it should be fermented before use.
Fermentation enhances quercetin, increases the production of beneficial vitamins, and lowers the pH—making it ideal for the scalp’s natural environment.
Here’s why it matters:
Fermentation enhances quercetin, increases the production of beneficial vitamins, and lowers the pH—making it ideal for the scalp’s natural environment.
Here’s why it matters:
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When fermented for 72 hours, onion juice becomes a nutrient-rich scalp treatment that:
• Stimulates dormant hair follicles
• Balances scalp pH
• Boosts growth at the root
• Reduces inflammation and microbial overgrowth
The result? Thicker, stronger, faster-growing hair.
• Stimulates dormant hair follicles
• Balances scalp pH
• Boosts growth at the root
• Reduces inflammation and microbial overgrowth
The result? Thicker, stronger, faster-growing hair.
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Here’s how to make fermented onion juice:
• Chop 1 red onion and blend it
• Strain out the juice with cheesecloth
• Add 8oz water, 1 tsp sea salt, and ½ tsp raw honey
• Cover with cheesecloth or a coffee filter
• Let it sit on your counter for 72 hours
Now it’s ready.
• Chop 1 red onion and blend it
• Strain out the juice with cheesecloth
• Add 8oz water, 1 tsp sea salt, and ½ tsp raw honey
• Cover with cheesecloth or a coffee filter
• Let it sit on your counter for 72 hours
Now it’s ready.
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How to apply:
• Wet your hair
• Massage the juice into your scalp for 2–3 minutes
• Cover with a shower cap
• Leave it on for 30 minutes to 1 hour
• Rinse thoroughly and shampoo twice
• Repeat twice a week for 4–6 weeks
Want to make it even more effective?
• Wet your hair
• Massage the juice into your scalp for 2–3 minutes
• Cover with a shower cap
• Leave it on for 30 minutes to 1 hour
• Rinse thoroughly and shampoo twice
• Repeat twice a week for 4–6 weeks
Want to make it even more effective?
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Add 5 drops of rosemary oil to your onion juice.
Research shows rosemary oil matched the effects of top hair loss medications—without the side effects.
It helps by improving blood flow, reducing inflammation, and repairing hair follicles.
Research shows rosemary oil matched the effects of top hair loss medications—without the side effects.
It helps by improving blood flow, reducing inflammation, and repairing hair follicles.
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Fermented onion juice + rosemary oil = an effective treatment for:
• Bald patches (like alopecia)
• Weak or thinning hair
• Itchy, flaky scalp
• Slow-growing hair
Most importantly—visible hair regrowth within a few weeks.
But don’t forget one last piece: vitamin D…
• Bald patches (like alopecia)
• Weak or thinning hair
• Itchy, flaky scalp
• Slow-growing hair
Most importantly—visible hair regrowth within a few weeks.
But don’t forget one last piece: vitamin D…
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Low vitamin D levels are linked to hair loss—aim for 10,000–20,000 IU/day or regular sun.
Healthy hair starts from within.
Fermented onion juice is a simple, proven remedy that delivers real results.
To see exactly how to make and apply it, watch here: youtu.be/y29tJpldBok
Healthy hair starts from within.
Fermented onion juice is a simple, proven remedy that delivers real results.
To see exactly how to make and apply it, watch here: youtu.be/y29tJpldBok
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A bit about me:
I’m the creator of Healthy Keto® and Intermittent Fasting protocols, helping over 100M people make healthier choices.
Follow me @dr_ericberg for more evidence-based insights to improve your health and longevity.
I’m the creator of Healthy Keto® and Intermittent Fasting protocols, helping over 100M people make healthier choices.
Follow me @dr_ericberg for more evidence-based insights to improve your health and longevity.
