Charcoal soap is everywhere, with big promises on the label. We read what health sources say about activated charcoal and what the makers of two charcoal bars publish. The honest summary: the evidence for skin benefits is thin.
Short answer: it is mostly a look
Activated charcoal has a real use in hospitals, but it is a different one from soap. StatPearls, a health reference from the U.S. National Library of Medicine, describes it as "a gastrointestinal adsorbent used in the management of acute oral poisoning and overdose." Adsorbent means things stick to its surface. That is inside the gut, in an emergency setting.
On skin, the picture is different. A 2020 review in Clinics in Dermatology says activated charcoal "has become popular in the cosmetic industry and is found in a variety of products, including facial cleansers and soaps." It then says that companies claim charcoal products help with several skin problems, "however, clinical evidence does not support these claims." The authors add that charcoal is "generally safe" but that there is "a lack of evidence to support its exfoliative or anti-aging abilities." A 2022 letter looked at charcoal on facial skin with imaging; we only read its title and citation, so we do not draw conclusions from it.
So the claims you see on labels ("deep cleans", "pulls out oil", "detoxes") are not backed by studies we could find. That does not make a charcoal bar bad. It makes it a bar soap with a dark color. If your skin is acting up, see a doctor instead of trying more products.
What a charcoal bar still is: soap
Whatever the color, a soap bar is made from oils and an alkali. A 2022 review of skin cleansers reports that soap has "a pH typically in the range of 8.5-11.0", while skin sits around 4.0 to 6.0, and that soap-based cleansers tend to disrupt the skin barrier more than milder synthetic cleansers. That applies to charcoal soap and plain soap alike. If your skin gets dry or tight after washing, the American Academy of Dermatology suggests a gentle cleanser, shorter showers (five to ten minutes in warm water) and, if dryness continues, a visit to a board-certified dermatologist.
Reading the label
Look for "activated charcoal" in the ingredient list if you want it in there. The ingredient list is also where you see what the bar is based on (for example "saponified" oils, which means oils turned into soap).
The scent comes from other ingredients. Two of the bars below use essential oils or a fragrance blend. The FDA says "fragrance" on a label can stand for a mix of many ingredients and that "some components of fragrance formulas may have a potential to cause allergic reactions or sensitivities for some people." Look for "fragrance-free" if your skin is sensitive.
Tea tree and peppermint oil. NIH's National Center for Complementary and Integrative Health says "most people can use topical products containing tea tree oil without problems, but some people may develop redness or irritation", and that the evidence for skin breakouts is small and "more studies are needed". A review of contact allergy found tea tree oil has caused more published allergic reactions than any other essential oil, mostly from using the pure oil. For peppermint oil, NCCIH says side effects on skin "can include skin rashes and irritation."
Two bars with charcoal on the label
Both are listed from the makers' own pages. We cannot say how well either works; we can only report what they publish.
1
Charcoal pick
Brickell Men's Purifying Charcoal Soap Bar (3-pack)
Best for: men who want a simple charcoal bar with a mint scent
Scent per the maker: "Energizing mint and tea tree scent"
Amazon lists it as a 3-pack of 5 oz bars
The brand marks some of the oils as certified organic. Check the Brickell page for the exact list. If mint or tea tree oils have bothered your skin before, skip it.
2
Scrubby option
Dr. Squatch Pine Tar Bar Soap
Best for: men who want a woodsy scent and a bit of grit
Ingredients (per Dr. Squatch): saponified oils (palm, coconut, olive), naturally derived fragrance, shea butter, pine tar, pine essential oil, oatmeal, sand, activated charcoal, kaolin clay, sea salt
Scent per the brand: "crisp pine, aromatic cedarwood, and refreshing eucalyptus"
Grit level listed as "Heavy"
Charcoal is one ingredient among many here; the grit comes from oatmeal and sand. Listed on Dr. Squatch's own page; check the Amazon listing for the pack size you choose.
Frequently Asked Questions
Does charcoal soap clean better than regular soap?
We found no study that shows it does. The review we read says the evidence does not support the marketing claims for charcoal skin products.
Is charcoal soap safe?
The same review calls activated charcoal generally safe. Any soap can bother some skin, and the scent ingredients (essential oils or fragrance) are a more likely cause than the charcoal. If a product irritates you, stop using it, and see a doctor if it does not clear up.
Can I use it on my face?
We did not find a source that answers this for these bars, and neither maker's page we read says it is meant for the face. Check the product page and, if you have a skin condition, ask a doctor.
Will it stain my towel?
We could not find a reliable source on this, so we do not say.
The verdict
Charcoal soap is a fine soap if you like the dark color and the scent. The science does not back claims about a deeper clean or fewer skin problems. Choose a bar by its full ingredient list and by whether you tolerate its scent ingredients, and use the Amazon links above to check current prices.
What skin-care experts say about washing oily, breakout-prone back skin: showering after sweat, mild cleansers, no hard scrubbing, and when to see a doctor.
