Which is the best shampoo bar? Here are 7 solid shampoo bars that hydrate and nourish all hair types

The good news is, we've found the best shampoo bar on the market. The catch? Have you ever actually considered using shampoo bars instead of reaching for your go-to liquid shampoo? 

Using shampoo bars a couple of times a week – or however often is enough for your particular hair type and texture – is something many of us are starting to do. However, most of us will still very much be used to using a liquid shampoo as the first step to clean hair without ever really giving it a second thought.

But times are changing and the concept of using shampoo bars – solid, soap-esque versions of liquid shampoo – as an alternative is becoming more mainstream. Shampoo bars were once the best-kept secret of avid travelers who would use them with wild abandon thanks to the fact there’s no need to worry about them possibly leaking all over your suitcase. Plus, they take up much less space and don’t count towards the all-important liquid allowance.

Nowadays, not only are shampoo bars much more readily available, but those into sustainable living are choosing to make the switch thanks to their incredible eco-credentials. You could easily make your own shampoo bars, if you were that way inclined, however, it's not a must as there are great options to be able to buy now.

But the main question is this: how do shampoo bars compare to the liquid shampoo that we’re all so used to using? We put seven to the test, and Ethique Mintasy came out on top, leaving hair feeling clean and hydrated.

How to choose the best shampoo bar for your hair type

Although it hasn’t always been the case, the choice of shampoo bars that are now available span the majority of hair types in a similar way to liquid shampoo. 

Like traditional shampoos, ensuring you use the right one for your hair type is all down to what they contain. Shampoo bars tend to be made from all-natural ingredients, so it’s really just a case of researching the different types of oils used and working out what will benefit your hair type most. For example, nourishing shea butter is great for dry, textured hair while cocoa butter and coconut oil are both have supremely hydrating qualities meaning they work well on damaged, brittle hair. Seaweed is great for keeping fine hair smooth, while added sea salt will also work to add volume to thinner hair. If you’re prone to an oily scalp, look for a shampoo bar formulated with charcoal, which will work to remove excess oil while aloe vera will gently cleanse sensitive skin types without causing irritation. 

The one thing that you always need to remember, though, is that it might take a few washes for your hair to adapt properly. There is always a transition period that comes with making the switch from traditional shampoo to shampoo bars, and after the first couple of washes hair may feel waxy; that’s completely normal and is why you should always stick with your choice of product before deciding it’s not quite right. 

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The best shampoo bar for most hair types

Ethique’s bright green, square-shaped shampoo bar was a pleasure to use. It smelt super fresh and minty thanks to the peppermint oil, and it foamed up really quickly and easily in comparison to some of the others we tried. The minty scent felt like it was helping to cleanse the scalp as well as the air, and it was easy to wash out, too. It didn’t leave hair in a tangled, matted mess and while hair did feel a bit too squeaky clean, it still felt cleansed, smooth, and hydrated without that telltale waxy feel that some shampoo bars can have in the first few uses. 

Read the full Ethique Mintasy Solid Shampoo review.

The best budget shampoo bar

Sulfate-free and vegan-friendly, this shampoo bar is as effective as it is affordable.
This is a good size in that it’s not too big and not too small, therefore making it easy to grip once it’s wet – it didn’t slip and slide all over the place (which is no mean feat for a shampoo bar!). However, it was quite difficult to foam up – it took some doing both in my hands and by rubbing directly onto the hair, which did cause a bit of unnecessary tangling. Once washed out, hair didn’t feel as squeaky clean as some shampoo bars, instead, it felt like regular liquid shampoo had been used. It didn’t have much of a scent but we didn’t find that to be a problem at all. 

The best shampoo bar for dry hair

We followed the shampoo bar with the conditioning bar and were pleased with the results; be warned the shampoo bar doesn’t create much of a lather or foam though. That’s due to the fact that it’s sulfate-free and therefore doesn’t have the foaming agents in it, but that doesn’t make it any less effective and instead is much kinder to the scalp and is less likely to dry it out or cause irritation. It also doesn’t have much of a scent, but that’s not necessarily a problem, it’s just down to personal preference. However, it did leave hair feeling soft, smooth, and manageable with a great shine to boot. 

The best volumising shampoo bar

A super fun brand, Nuddy’s peach, and acai shampoo bar smells incredible and really works to help volumize hair. Super easy to use, it lathered up really quickly and easily. It didn’t leave hair feeling too clean, and nor was it too tangled or knotted after using. Nuddy claims there’s no transition period for this shampoo bar and we can wholeheartedly agree; hair felt smooth and soft like it usually would after using traditional liquid shampoo, plus it was still super manageable and easy to brush through post-wash. The added bounce and volume also lasted until the next wash. 

The best shampoo bar for damaged, coloured hair

We found that this shampoo bar took a while to foam up but when it did eventually start to later, it was definitely worth the wait. It didn’t smell very strongly though, and hair didn’t feel too squeaky clean. It was used with the solid conditioner from the same range, which actually left hair feeling much smoother and more hydrated than we thought it would. However, once hair had been dried and styled it did feet a bit limp and greasy, although the more the shampoo bar was used the less that tended to happen so that could just have been the tell-tale transition period. 

The best shampoo bar to moisturise hair

Super foamy and coconutty, this shampoo bar smelt incredible and had a lovely, rich lather. It cleaned effectively from the very first use, which was used on hair that was full of three-day-old grease, dirt, and dry shampoo. My hair was left feeling cleansed and much lighter. The double dose of coconut is really moisturizing but the addition of sodium coco sulfate, which although doesn’t contain palm oil, is still a type of sulfate used to help a product foam but that can often cause dryness on the scalp. It’s especially good for those with super dry and curly or textured hair because of the sheer amount of moisturizing properties it has. 

The best shampoo bar for a luxurious treat

The brand ethos is to create products that would be at home a French pharmacy whilst retaining the green California living factor. Aptly named 552M, which signifies the 552 million shampoo bottles that end up in landfills each year, this humble soap bar’s mission is simple: they save the planet and rather conveniently, your hair at the same time. As for the bar itself? Coconut oil wraps hair in moisture and helps to improve texture on even dry, frizzy, and color-treated hair. The soap-free formula is perfect for those with sensitive scalps.