Can a Shampoo Bar Actually Replace the Bottle?

The shampoo bar has an appealing simplicity.

Take something most of us have bought in plastic bottles our entire lives, remove most of the water, reduce the packaging, make it smaller to ship, and—ideally—keep everything people actually liked about shampoo in the first place.

That last part is important.

A lower-waste product isn't much of an improvement if people don't like using it. That’s why The Earthling Co. caught our attention.

The company makes solid shampoo and conditioner bars designed to reduce disposable packaging while still competing on the things consumers actually care about: volume, shine, softness, strength, frizz, convenience, and price. [1]

And unlike many brands selling an alternative to a familiar product, Earthling has made a meaningful effort to test whether its alternative actually performs. [1]

So we ask: Has Earthling built a genuinely useful replacement for bottled hair care—and does its marketing stay within what the evidence actually supports?

So far, the answer is encouraging. With a few important qualifications.

What Is Earthling Actually Trying to Fix?

Most conventional shampoo and conditioner are sold as a liquid. Earthling takes a different approach.

Its shampoo and conditioner come as concentrated solid bars, packaged primarily in paper-based materials, and designed to last through dozens of washes. The company says one bar can replace roughly two to three conventional bottles, depending on use. [1][5]

This is not a new category.

Other companies are solving the same problem in different ways. Swell Labs, for example, currently sells a concentrated solid product combining shampoo and conditioner into a single bar. [13]

That’s worth noting because Earthling does not need to be the only answer. It can simply be one good answer in a growing market trying to reduce packaging and unnecessary product weight without asking consumers to accept worse performance.

More good solutions mean more useful choices.

Does It Actually Work?

This is where Earthling becomes particularly interesting.

The company says its shampoo and conditioner bars underwent third-party testing measuring properties including volume, shine, softness and smoothness, strength, and frizz. [1][2]

Earthling currently reports results including an 85% increase in hair volume, 89% increase in shine, and 66% increase in softness and smoothness under its testing protocols. [1]

Those numbers should not be read as a promise that every customer’s hair will become 85% more voluminous.

They come from controlled testing. But that distinction does not make them meaningless.

Earthling is not relying entirely on testimonials such as “my hair feels amazing.”

It has attempted to measure whether the product changes the physical properties it claims to improve. Earthling also reports that 95% of users saw improved hair health within four weeks and describes its bars using clinical-performance language. Company materials also reference a study involving approximately 127 participants. [1][2]

That sounds promising. It also raises one of our biggest remaining questions.

What Does “Clinically Proven” Mean Here?

Earthling describes its bars using terms including “clinically shown,” “clinically tested,” and, on some company material, “the first clinically tested shampoo and conditioner bar.” [1][2]

Some of the testing Earthling has publicly described involves human hair tresses evaluated using laboratory methods.

That is meaningful product testing.

But testing hair samples in a laboratory is not necessarily the same thing as conducting a controlled clinical trial involving people.

Earthling also references a separate result in which 95% reportedly saw improved hair health within four weeks. [1]

That could materially strengthen the company’s case. What we have not yet been able to establish publicly is exactly how that portion of the research was conducted.

What counted as “improved hair health”? Was improvement instrumentally measured or reported by participants? Was there a comparator? Which formulations were tested?

Those details determine what the study actually proves. So we have asked Earthling for the underlying methodology and supporting documentation before finalizing this part of our assessment.

That is a much better problem to have than no testing at all.

Earthling appears to have done real performance testing. The exact scope of what its clinical language establishes still deserves clarification.

Earthling Does Not Need Conventional Shampoo to Be Dangerous

This is where the company’s case becomes less persuasive.

Its strongest argument is already fairly good: it built concentrated shampoo and conditioner bars, reduced disposable packaging, and tested whether they perform.

That can stand on its own. But some Earthling marketing goes further.

The company uses language involving “toxic” or “non-toxic” ingredients and highlights the absence of sulfates, silicones, parabens, synthetic fragrances, and other ingredients in its formulations. Some company pages also associate certain conventional hair-care ingredients with hair loss or damage. [1][9]

Consumers are perfectly entitled to prefer products without those ingredients. Earthling is equally entitled to formulate without them.

The problem comes when “we don’t use this ingredient” quietly becomes “this ingredient is therefore dangerous.” Those are different claims.

For example, the FDA says parabens are commonly used as preservatives to limit harmful bacterial and mold growth in cosmetics. The agency states that it currently does not have information showing that parabens, as they are used in cosmetics, have an effect on human health. [3]

FDA guidance also cautions consumers against assuming that a cosmetic is safer simply because its ingredients are described as natural or organic. Ingredient source alone does not determine safety. [4]

That does not mean every conventional shampoo is ideal for every person.

Harsh cleansing can contribute to dryness, and people with fragile or thinning hair may benefit from gentler products. The American Academy of Dermatology recommends gentle shampoo and conditioning for people dealing with thinning or fragile hair because reducing dryness and friction can help limit breakage. [6]

But dryness, breakage, shedding, and biological hair loss are not interchangeable. That distinction matters because some Earthling sales materials extend into claims involving hair loss, follicles, density, and hair growth. [9]

Those are materially stronger claims than saying a product improves shine or volume. Earthling’s testing gives us meaningful reason to believe its products can affect cosmetic characteristics of the hair.

It does not, from the evidence we have reviewed so far, automatically establish that the finished products reverse follicle damage, restore density, or meaningfully alter the biological causes of hair loss. And that is where the marketing begins to outrun the strongest evidence we found.

What Is Actually in the Bars?

One thing we appreciate is that Earthling does not pretend its products are simply plants pressed into a square.

Its current ingredient lists include botanical ingredients alongside functional cosmetic ingredients designed to clean, condition, improve manageability, and keep the formulation stable. [1][2]

That matters because alternative personal care sometimes turns chemistry itself into the villain. But chemistry is what makes shampoo work.

The more useful question is not “Is this synthetic?” It is: “What does this ingredient do, and is the finished product appropriate for its intended use?”

Earthling’s ingredient disclosure is comparatively transparent.

Consumers who prefer sulfate-free, silicone-free, paraben-free, or fragrance-free options can identify those choices clearly. [1]

That is useful. The absence of those ingredients, however, should not be treated by itself as proof that products containing them are unsafe. [3][4]

The Environmental Case Is Meaningful—But Keep It in Proportion

Earthling’s lower-waste design is more than a marketing theme.

The company uses concentrated solid bars and primarily paper-based packaging for the products we reviewed. It reports that its community has displaced more than 3.8 million plastic bottles and saved more than 335,000 gallons of water since 2020. [5]

Those totals are company calculations, and we have asked for more information about how they are derived.

But the underlying benefit is straightforward: a shampoo bar generally does not require a new disposable liquid-shampoo bottle each time it is replaced.

Earthling also has current independent climate certification.

The Climate Label lists The Earthling Co. as certified for 2026 and reports approximately 908 metric tons of 2025 greenhouse-gas emissions, an emissions intensity of approximately 0.69 kilograms CO₂e per unit of product, climate funding, and active emissions-reduction plans. [7]

That gives the company’s environmental program more substance than a generic sustainability badge. There is measurement. There is an external framework. And there are documented reduction efforts.

That deserves credit.

The public picture is thinner when it comes to upstream ingredient sourcing and supplier practices, so we would keep the broader sustainability claim more measured.

Earthling has established meaningful lower-waste packaging and climate-accounting practices. Some broader sourcing and cumulative impact claims remain more dependent on company representations.

That is still a positive finding. It simply tells us where the public evidence becomes less complete.

What Is It Like to Actually Buy From Them?

Earthling currently sells its bars through both one-time purchases and discounted automatic refills. Its product pages say subscriptions can be skipped, changed, or canceled, and customers are charged when the order ships. [1]

The company also currently advertises a 100-day results guarantee. [1]

That is meaningful protection for a product category where individual experience can vary considerably.

Hair is personal. A formulation that works beautifully for one person may leave another person’s hair feeling heavy, dry, flat, or difficult to style. No laboratory result eliminates that reality.

We also found a small cluster of public subscription-management complaints concentrated primarily in 2025. Public complaints included difficulty managing recurring orders and confusion involving subscription status or multiple subscriptions. [11][12]

Earthling publicly responded to several of those complaints, and at least some were resolved. [11][12]

We have not established that the same problems persist today. That time context matters.

We have asked Earthling whether it changed its subscription platform, cancellation flow, account system, or checkout disclosures after those complaints.

If the company identified a problem and corrected it, that improvement belongs in the record too.

Who Is Behind The Earthling Co.?

The Earthling Co. identifies Emelia DiBello and Kevin McQuiston as its co-founders. Emelia has described the frustration behind the company plainly: she wanted natural and low-waste products but found that many did not perform as well as she wanted. Her goal became combining efficacy with the ingredient preferences she was looking for. [8]

That philosophy matches much of what we found.

The Earthling Co. website is owned and operated by Bellodi LLC. [10] Earthling operates through Bellodi LLC and remains publicly associated with its founders.

Ownership alone does not determine whether a company is worthy. But knowing who stands behind a brand helps consumers understand what they are supporting.

One Credential Claim We Asked Earthling to Clarify

Earthling prominently features dermatologist Dr. Sanober Pezad and describes her as a “Double US Board Certified Dermatologist.” [2]

We found substantial evidence that Dr. Sanober Pezad has legitimate medical and dermatology training. Public professional descriptions identify credentials including an MD in Dermatology, Venereology and Leprology and DNB Dermatology, and her own professional materials describe her as a dermatologist. [14][15]

Our concern is narrower.

The public credential descriptions we located did not clearly identify the two U.S. boards referenced by Earthling’s wording. [14][15]

We are not passing judgment on the value of Dr. Pezad’s credentials.

We are simply documenting that Earthling’s wording and the public record we found did not clearly match, so we asked the company to clarify exactly which U.S. boards it is referencing.

If Earthling provides that clarification, we will incorporate it. If the wording needs correction, we hope the company corrects it.

Either way, the purpose is the same: professional credentials are used to increase consumer confidence, so they should be represented precisely.

Earthling Is Not the Only Good Answer

Earthling exists within a larger movement toward concentrated personal care.

Some companies combine shampoo and conditioner into one bar. Swell Labs, for example, currently markets its Stem as a combined shampoo-and-conditioner solid product. [13]

Some prioritize maximum use-life. Some focus on sensitive skin. Some emphasize fragrance-free formulations. Others concentrate on sourcing, price, or routine simplicity.

That is healthy. Consumers do not benefit when every product category is reduced to one biased winner surrounded by losers. They benefit when several companies compete to solve the same problem well.

Earthling therefore does not need every bottled shampoo to be bad. And it does not need every competing shampoo bar to be worse.

It only needs to show consumers what it does well enough for them to decide whether those differences matter.

Where We Stand

The Earthling Co. has earned our attention.

Its shampoo and conditioner bars address an understandable consumer problem: can we reduce packaging and unnecessary product weight without accepting worse hair care?

The company appears to have taken that question more seriously than simply replacing a plastic bottle with kraft paper and calling the job finished.

It invested in third-party performance testing. [1] It publishes detailed ingredient information. [1] It operates a concentrated solid-product model with lower-plastic packaging. [5] Its environmental program includes current outside climate certification. [7] And its founders appear to understand something important: a more sustainable product still has to work. [8]

Those are substantive strengths.

Where Earthling becomes less convincing is when portions of its marketing move beyond those demonstrated strengths into broader claims about toxic ingredients, hair loss, follicles, clinical proof, or long-term hair-health outcomes. [1][2][9]

Some of those claims may ultimately have stronger evidence behind them than we have located publicly. That is why we have given Earthling the opportunity to provide it.

But based on what we can establish today, Earthling’s strongest argument is the product it built—not fear about the product already sitting in someone’s shower.

That may ultimately be good news for the company. There appears to be plenty here worth considering without fear of doing the selling.

For some consumers, bottled shampoo will remain the better choice. For others, Earthling may offer a practical way to reduce recurring packaging while keeping a familiar shampoo-and-conditioner routine.

Other solid-hair-care companies may offer different tradeoffs that fit someone else better.

Our job is not to crown a winner. It is to make those differences easier to see.

Research deep. Publish clear.

Fearless in service. Careful in claims.

Sources & Bibliography

[1] The Earthling Co. — “Shampoo & Conditioner for Thickness & Volume”. Current product page reviewed October 2026. Supports performance claims, reported clinical results, ingredient-positioning language, automatic-refill terms, and the 100-day results guarantee. https://theearthlingco.com/products/shampoo-and-conditioner-bar?view=updated2026

[2] The Earthling Co. — “Shampoo Bar for Thickness & Volume”. Current product material reviewed October 2026. Supports “first clinically tested” language, performance figures, Dr. Sanober’s endorsement and credential wording, manufacturing representation, replacement-bottle claims, and hair-growth-oriented marketing. https://theearthlingco.com/products/shampoo-bars

[3] U.S. Food and Drug Administration — “Parabens in Cosmetics”. FDA consumer guidance on the preservative role of parabens and the agency’s current position on health effects from parabens as used in cosmetics. https://www.fda.gov/cosmetics/cosmetic-ingredients/parabens-cosmetics

[4] U.S. Food and Drug Administration — “Using Cosmetics Safely”. FDA consumer guidance explaining that ingredient source does not by itself determine cosmetic safety. https://www.fda.gov/cosmetics/resources-consumers-cosmetics/using-cosmetics-safely

[5] The Earthling Co. — “Sustainability”. Current company sustainability page. Supports packaging descriptions and company-reported cumulative plastic, water, carbon, and environmental impact figures. https://theearthlingco.com/pages/sustainability

[6] American Academy of Dermatology — “Hair Loss: Tips for Managing”. Guidance on gentle shampoo, conditioning, fragile hair, breakage, and hair-loss management. https://www.aad.org/public/diseases/hair-loss/treatment/tips

[7] The Climate Label / Change Climate — “The Earthling Co.”. Independent certification record listing 2026 certification, 2025 emissions, emissions intensity, climate funding, and reduction plans. https://explore.changeclimate.org/brand/the-earthling-co

[8] The Earthling Co. — “Behind the Brand: A Q&A with The Earthling Co. Founders”. Identifies Emelia DiBello and Kevi