If you’ve been seeing those ads claiming MEIDU 3-in-1 Hair Dye Shampoo can fix gray hair “in 20 minutes,” you’re not alone. The videos make it look like the shampoo works like magic, rub it in during your shower and walk out with rich, dark hair. It sounds convenient, almost too good to be true. So I decided to look into what this shampoo actually is, what ingredients it uses, and what real users are saying.
Here’s my honest experience and the research that made me rethink the whole product.
The Big Claim: Reverse Gray Hair With “Ancient Herbs”
MEIDU markets their shampoo around herbal ingredients, especially Polygonum Multiflorum, a traditional Chinese herb that’s often linked to hair and color restoration. The problem?
There is no biological way this herb can change your hair color in 20 minutes.
Hair pigmentation comes from melanin production inside your follicles, not from something you rub on for a few minutes. So the moment I saw these “instant transformation” videos, it was clear this wasn’t about herbs doing any work, it had to be synthetic dye.
The ads just dress it up as something natural.
Real User Experiences Tell a Very Different Story
Once I started reading customer feedback, a pattern started to form.
1. Orange and red tones instead of brown
A surprising number of people reported turning their hair orange, copper, or even red.
Not exactly the natural brown that the brand keeps promoting.
2. Color fading after just a couple of washes
While MEIDU claims the color lasts four weeks, many users said it barely made it past two shampoos. For something marketed as long-lasting, that’s disappointing, especially if you were hoping to maintain one color.
3. Nearly half the reviews are flagged as unreliable
Around 43% of the online reviews show signs of manipulation, repetition, or spam-style writing. When almost half the praise looks questionable, it’s hard to trust the overall rating.
Is the Shampoo Safe? This Part Worried Me the Most
I found several reports of:
- chemical burns
- allergic reactions
- scalp irritation
- redness and itching
This is especially concerning for a product marketed as “natural.”
If the color is happening instantly, it’s not herbs doing the job, it’s chemical dyes. And those can be harsh if you have sensitive skin or allergies.
Herbal branding doesn’t match the actual chemistry.
My Thoughts After Trying and Researching the Product
When I tested the MEIDU shampoo myself, here’s what stood out:
- The color took quickly, too quickly for any herb.
- The tone was darker but looked a bit flat and artificial.
- There was a strong chemical scent despite the “herbal” marketing.
- The color rinsed out faster than expected over the next few washes.
It basically behaved like a temporary or semi-permanent dye disguised as a natural shampoo.
What the Marketing Doesn’t Tell You
The product is built around quick cosmetic color, not long-term gray reversal.
There’s nothing wrong with a temporary dye if that’s what you want, but MEIDU frames it as a biological solution, and that’s misleading.
The idea that you can restore melanin in 20 minutes is scientifically impossible. Melanin production is not an “instant” process, and herbs cannot penetrate hair in the way these ads suggest.
Is MEIDU 3-in-1 Hair Dye Shampoo Worth It?
If you want a quick, temporary color fix, this shampoo might darken your hair for a short time, though the shade may not be what you expect.
But if you’re hoping for:
- natural ingredients
- long-lasting results
- gray reversal
- herbal restoration
- safe, gentle coloring
This isn’t the product for you.
Conclusion
Between the fading color, inconsistent tones, questionable reviews and reports of irritation, MEIDU feels more like a fast dye wrapped in a herbal story than a real solution for gray hair.
There are safer, clearer, and more reliable hair color options out there that don’t hide behind marketing.
Check out the Frownies Patch I reviewed earlier.