The hair-darkening shampoo bar is a new product that has recently hit the market. The shampoo bar is said to whiten hair and prevent hair loss.

There is absolutely no doubt that this sounds like something that would be highly beneficial for many people. But does the hair darkening shampoo bar really work?

Of course, to know more about this trending hair darkening shampoo bar, I had to try it myself.

I tested some brands that offer shampoo bars to see if they really work.

Now let’s look at the excellent shampoo bar and what makes it so unique.

Do Hair Darkening Shampoo Bars Work?

Hair Darkening Shampoo bars do work in general. They are a quick and effective way to hide gray hair without causing any harm.

I tried a hair darkening shampoo bar for about a month and a half, and they work. I see less gray strands on my hair. However, they don’t last as well as permanent dyes.

Do hair-darkening shampoo bars work

Of course there are some naysayers as shown below

honest hair darkening shampoo bar reviews
amazon review

Who Is It Useful For?

For those who wish to maintain their hair’s color without dye, the best hair darkening shampoos for you are the ones that do. The product can be used by women who conceal the first few gray hairs. This shampoo is excellent for people with other hair types as it doesn’t harm hair and can restore the color of light or dyed hair.

Redheads can darken their hair with shampoo containing copper and red hues pigments. This will preserve the color. To counteract the orange tones on your wires, use shampoos already for blondes.

But if you consider buying others, you can refer to our top best shampoo and conditioner.

Best Hair Darkening Shampoo Bar

There are tons of hair darkening shampoo bars you can find online or in physical stores. To help you choose which brand to buy, I have listed three of the best hair darkening shampoo bars.

Wuerjo Hair Darkening Shampoo Bar Natural Organic Conditioner and Maintenance (From Amazon) 

Best Darkening Shampoo Bar for Grey hair

This hair darkening shampoo has more than 2,000 reviews on Amazon. It claims to naturally restore the color of your hair as it is formulated with 100% organic herbs. 

Hair Darkening Shampoo Bar

This shampoo bar is also non-toxic and chemical-free, which is safer than traditional shampoo.

The ingredients of this shampoo bar also help in making your hair shiny and healthy. 

PURC Polygonum Shampoo Bar

Top Pick Hair Darkening Shampoo Bar

This #1 best-selling shampoo bar is a top choice for many shampoo bar fans. 

The shampoo bar contains polygonum oil which is responsible for darkening and thickening hair. It also has olive oil to strengthen your hair, keeping it away from dandruff and flakiness. 

PURC Polygonum Shampoo Bar

Another ingredient is Panax ginseng which helps restore your hair growth and strengthens follicles.

PURC Shampoo bar is a fan favorite as it is proven to bring back the original color of your hair without using dye. 

This product has tons of reviews on its website.

TruuMe Hair Darkening Shampoo Bar (From Amazon)

Natural Hair Darkening Shampoo Bar

The organic shampoo bars in this pack are made with high-quality, natural ingredients like shea butter, olive oil, ginger oil, and ginseng extract, leaving your hair looking and feeling great.

TruuMe Hair Shampoo Bar

With two different scent options – ginger and Polygonum – you can enjoy a refreshing, different experience every time you use them.

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How Do Hair Darkening Shampoo Bars Work?

These hair-darkening shampoo bars work in the same way as other hair-darkening products. They coat your hair with plant pigments to give it a darker look.

Personally, I just rubbed the shampoo bar on my hair or I also tried rubbing on my palms and directly massaging it on my hair strands.

They sit on top of the hair rather than fully absorbed by it. This is why they gradually fade and wash away with every wash. On the other hand, permanent dyes remove some of your hair’s natural colors and replace them with shades.

Hair-darkening shampoo bars work best if you leave the shampoo in your hair for some time. This allows the shampoo to absorb more plant pigments.

When I used this hair darkening shampoo bar, I left it on my hair for about 5 minutes before rinsing it.

How Do Hair-Darkening Shampoo Bars Work

The downside to hair-darkening shampoo bars for hair is their inability to last as long as permanent dyes. You will need to continue using them if you want your hair to remain darker.

Since I only tried it for about a month and a half, I stopped using it and I noticed that it fades quickly.

They are often made with natural ingredients and do not contain harsh chemicals like ammonia. They can be gentler on your hair.

This means that you don’t need to be concerned about the long-term effects it has on your hair and scalp, even though you use it more frequently.

How does organic darkening shampoo bar work?

An organic darkening shampoo bar is perfect for restoring pigment cells while conditioning your hair with 100% organic herbs. These herbs are non-toxic and chemical-free, making them safer than traditional shampoos. 

The Polygonum ingredient provides an all-around hair care solution, keeping the scalp healthy and natural hair moist and shiny. It also prevents hair loss and the growth of grey hair while repairing hair follicles and keeping them healthy, soft, and shiny.

Who Uses A Hair-Darkening Shampoo Bar?

Individuals who want to keep their hair darkened without having to dye it are recommended to use hair darkening shampoo bars.

This shampoo bar can be used to cover white hairs temporarily. It blackens the hair but does not make it permanent.

Like me, I tried a hair darkening shampoo bar since I am one of those people who are having gray strands of hair already. I tested the product to see if it will really work to bring back the natural color of my hair.

You may also prefer the shampoo bar for people with different hair types. It is gentler on hair and can restore color to dull or damaged hair.

These shampoos are popular because they contain copper or red pigments. This makes them easy to use to keep their red hair color. Blondes should use products with more violet and bluish tones to counteract the orange tones in their hair.

Polygonum Shampoo Bar

Benefits Of Hair Darkening Shampoo Bar

It is easy to doubt the effectiveness of hair-darkening shampoo bars if you haven’t tried it yet. These are some of the benefits of hair-darkening shampoo bars that might make you want to try them more.

  • Its effectiveness

You might be most interested in the fantastic bars. This bar can help you restore your natural hair color and beauty if you’ve been dealing with grey hairs in the past.

I saw results after a month and a half of using a hair darkening shampoo bar. But take note that effectiveness may vary depending on your hair type or the brand of shampoo bar you purchased.

You will see excellent reviews about the product, which will help you understand the customers’ satisfaction. It is highly effective and straightforward to use.

  • It is clean
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Customers are often concerned about the ingredients in products such as hair-darkening shampoo bars. You will be surprised to learn that the hair-darkening shampoo bars are made with only natural ingredients, which won’t harm your hair. It is chemical-free and preservative-free.

The shampoo bar I bought is non-toxic and chemical-free, plus it has organic and natural ingredients which I love.

  • Affordable

The 21st-century values money in a big way. If they felt that a product was not worth the price, they wouldn’t buy it. The price tag of hair-darkening shampoo bars is not a concern. For most generalized hair graying issues, shampoo bars are pretty affordable.

Benefits of hair darkening shampoo bar
  • It lasts longer

People today are more comfortable using liquid shampoos and soaps. The liquid shampoos can be more expensive and don’t last as long as the shampoos. They are more effective and last longer than other shampoos.

  • Transport is easy

Your hair hygiene products such as shampoos and soaps are essential when you travel for business or pleasure. However, if you have a liquid shampoo bottle with you, many risk factors could be involved in transport.

You are now free from such miseries because the hair-darkening shampoo bar is here to save you. You don’t have to answer anyone if you carry a hair-darkening cream bar.

  • You can do it yourself.

Many people spend a lot on liquid shampoos. These products are expensive because of the packaging and bottles. You don’t have to worry about buying bars as you can make a shampoo bar yourself.

You can order a few ingredients online or at the local grocery store. The basic rules for making shampoo bars can be followed and used for up to a year.

  • It’s green:

Natural ingredients are cheaper and more healthy than artificial ones. The hair-darkening shampoo bar can cause no harm unless you are allergic. Hair-darkening shampoo bars do not contain any harmful or preservative chemicals. It is all-natural and organic. Even the packages of the products are environment-friendly!

How long does hair darkening shampoo bar take to work?

There is no one-size-fits-all answer to how often you should use a shampoo bar, as it depends on your individual hair health, condition, and scalp type. 

Generally, it takes around 4-6 weeks for a shampoo bar to impact your scalp. After 2 weeks, you should start to notice some improved hair health.

A hair-darkening shampoo bar is a type of shampoo that is specifically made to darken one’s hair color. 

It usually contains natural ingredients such as henna, black walnut hulls, indigo leaves, black tea, blackberry leaf extract, and activated charcoal. These organic ingredients are known to safely and effectively dye the hair a darker color. 

Many people use these bars to achieve a darker shade of hair, as they are often more gentle and less harsh than traditional hair dyes.

This shampoo uses oxygen from the air to activate the dye. The oxidation process that causes the hair’s darkening takes place 10-15 minutes after application; however, smaller changes in hair color can still occur within the next 24 hours.

Disadvantages to Hair Darkening Shampoo Bar

Each product has its own set of disadvantages and advantages. In the previous section, you have read the benefits of using a hair-darkening Shampoo Bar. Now it’s time to look at the drawbacks and benefits of using a hair-darkening shampoo bar.

  • Hair-darkening shampoo bars come in a concentrated form that might not suit you.
  • After a prolonged period of using liquid shampoo on your hair, switching to the hair-darkening shampoo bars can hurt your hair’s follicles.
  • A hair-darkening shampoo can cause wax buildup in the hair follicles and other areas.
  • Oily hair, entangled hair, and dirty hair can all be problems.
  • Hair-darkening shampoo bars should not be used on people with curly hair or those who have thick hair.
Hair Darkening Shampoo Soap

How to Use Hair Darkening Shampoo Bar

Do you want to know how to get the best results from your hair-darkening shampoo bars? A hair-darkening shampoo can be used like any other shampoo.

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This means you only need to shampoo your hair, wash it thoroughly, then shampoo it. Rinse it off after the indicated time. These tips will help you maximize the results of hair-darkening shampoo bars.

Step 1: Wet Your Hair First

Warm water should be used to wash your hair. This will create a frothy foam that will give you the best shampooing experience.

Step 2: Make a Lather.

Then, rinse the shampoo bar under the water and massage it between your hands to create foam. Massage the shampoo bar into your hair. You can massage the bar directly into your hair, or you could do it in another way.

Step 3: Apply It To Your Hair

It would help to massage the shampoo into your hair like you would with a regular liquid shampoo. You should pay more attention to the roots and scalp.

Step 4: Rinse Your Hair and Condition It.

After shampooing your hair, rinse it off thoroughly. After shampooing, apply your regular conditioner or a firm conditioner bar to your hair.

Step 5: Comb Your Hair

After shampooing and conditioning your hair:

  • Use a towel to dry it.
  • Use a wide-toothed comb to remove any knots.
  • Start at the ends and work your way up to the roots.

Step 6: Style

The last thing you need to do is blow-dry or air-dry your hair. Style it as usual. Now you have beautifully darkened hair.

Honest Hair Darkening Shampoo Bar Reviews

Hair Darkening Shampoo Bars have been a trend today as it was said to replace almost three bottles of ordinary shampoo. Moreover, it claims that it helps darken hair color.

However, reviews about hair-darkening shampoo bars have been a little critical regardless of their brand.

Many users report that the hair darkening shampoo bars don’t do what it claims. One user said that he’s been using a shampoo bar for a month but still doesn’t see any results.

“This did not cover 1 strand of hair. So very disappointed. Don’t waste your money.”

Of course, despite all the negative reviews, there are also some positive reviews about hair darkening shampoo bars. I guess this will really depend on the brand.

Some users say that using it for 8 months made their hair soft and their gray hairs turn back to their original color.

“A miracle shampoo bar!

I have been using it for 8 months, and more and more grey hairs have turned back to the original dark brown!

Such a relief!

Smells pleasantly earthy, and there is great foam.

Absolutely recommended!”

As for me, it does work on my hair, but it will take time. Plus, I used a trusted hair-darkening shampoo bar to know it will be worth the money.

Hair Darkening Soap Bar: Questions

How Long Does A Hair Darkening Shampoo Bar Last?

To activate the dye, this shampoo uses oxygen from the atmosphere. After application, the oxidation process, which causes hair to darken, takes about 10-15 minutes. You may see a slight change in the hair’s color within 24 hours.

How Often Should You Use Hair Darkening Shampoo Bars?

Wet your hair first. Use some water to make a lather. Massage the shampoo bar into your hair for a few seconds, then rinse off thoroughly. You can use it 3-7 times per week or depend on your preference.

How often should you use hair-darkening shampoo bars


The shampoo bar does work, and it is a huge time saver. If you want to get rid of the gray in your hair, you should use this. The shampoo bar can whiten your hair, help prevent hair loss, and you can save tons of money while doing it.

The hair-darkening shampoo bar is a great product. So I encourage you to get your own and use it. You will be happy you did. Leave a Reply.


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