Moerie is a personalized hair growth brand. Customers fill out a quiz on the brand’s website and the brand claims to be "here to help with thin, damaged, slow-growing hair."
But is Moerie actually proven in clinical studies to be effective? Do their care products contain research-backed ingredients for hair regrowth? Do they contain any unhealthy additives? And how do real users rate and describe the effects of Moerie?
In this article we’ll answer all of these questions and more, as we analyze the ingredients in Moerie’s Ultimate Hair Growth Spray and Ultimate Hair Growth Shampoo to give our take on whether or not they're likely to be effective, and whether or not they're healthy.
We’ll share our concerns about Moerie's clinical claims, share our concerns about the brand's quiz and “customized” results, and feature real Moerie customer reviews.
Is “Personalized” Hair Care Unscientific?
Like many personalized cosmetic brands, Moerie has an intake form that asks health questions and then claims to formulate a custom product based on the answers.
However, the brand doesn’t provide any proof that this process yields better hair outcomes than regular hair care products, and the process seems somewhat unscientific in our opinion.
When we input sample responses into Moerie’s intake form, a graph shown below popped up suggesting our potential results:
How can Moerie claim this specific level of hair growth without any proof?
The brand doesn’t appear to have been studied in any clinical trials, and this graph is entirely uncited, so we have no idea where they’re pulling this data from.
The results page also included two confusing graphs shown below:
There is no explanation as to how the “damage” is quantified, and while these graphs look pretty, they don’t actually represent anything tangible because again the brand provides no explanation or proof of these suggested results.
We haven’t seen any convincing clinical evidence that personalized hair care is more effective than regular hair products that are mass-produced.
As we discussed in our review of another personalized hair care brand called Harklinikken, we consider personalized hair care more of a marketing strategy than a strategy founded on strong science.
What’s even more concerning about Moerie’s site is that the results appear to be the same for everyone, suggesting this is just a marketing play with fake numbers.
Input the following address into an incognito window and you’ll see the exact same results that we were shown: https://spray.moerie.com/results
Whether or not a hair care product will be effective depends on its ingredients, not whether or not it’s personalized.
If it contains ingredients proven in clinical trials to cause hair growth, then it’s likely to be effective. If it doesn’t, it’s likely not.
Ingredient Analysis
The ingredients in Moerie Ultimate Hair Growth Spray are shown above.
Mentha piperita (peppermint) oil is clinically shown to cause hair growth.
Onion was shown in a clinical trial published in The Journal of Dermatology to cause hair regrowth in 74% of trial participants.
Rosemary oil was shown to be equally effective to the active ingredient in Rogaine for causing hair regrowth after six months in a 2015 clinical trial.
This formulation also contains several additive ingredients that we consider questionable from a health perspective.
Phenoxyethanol is a synthetic preservative that's clinically shown to be toxic to human cells, as we documented in our Keeps review article.
Moerie updated this formulation since our initial review, and significantly improved it. We were unable to identify any active ingredients in the previous formulation which were clinically shown to cause hair growth.
We consider Moerie Ultimate Hair Growth Spray likely to be effective for supporting hair regrowth due to its numerous research-backed active ingredients.
We don't currently recommend this product due to the use of phenoxyethanol.
The ingredients in Moerie Ultimate Hair Growth Shampoo are shown below:
Betaine was shown to be effective as an oral supplement for hair growth in a 2016 clinical trial, but we can’t find any studies proving its effectiveness when used topically.
Arginine is an amino acid that can prevent hair damage, as we documented in our review of Redken Shampoo.
Caffeine may be effective for hair loss when applied topically.
A medical review published in the Skin Pharmacology and Physiology journal analyzed clinical trial data on the compound and concluded the following: “caffeine to alleviate hair loss may provide a much-needed alternative to drug-based approaches.”
Phenoxyethanol is included as a preservative in this formulation, and we explained in the section above why we recommend avoiding this ingredient.
We consider Moerie Ultimate Hair Growth Shampoo likely to be effective for supporting hair regrowth due to its numerous research-backed active ingredients.
We don't currently recommend this product due to the inclusion of phenoxyethanol.
Questionable Claims on Moerie Website
When we initially published this article, there was a banner on Moerie’s website (shown above) suggesting that the brand had been featured in a number of high-profile media publishers including The New York Times.
However, we couldn't find a single reference to the brand in three of the five publishers featured (Cosmopolitan, Healthline, Women’s Health), and the brand appears to have since removed this banner from their site.
We also shared our concerns about the brand describing their products as “clinically proven treatment,” while we couldn't find a clinical trial on Moerie published in any peer-reviewed journals, nor did the brand cite any such studies.
The brand has removed this claim since the publication of our article.
We also called out Moerie for having a page on their website with the header “Trust Through Transparency,” which featured an image of a young woman who was described as their “Hair Expert,” shown below:
However, this image actually came from a stock image. Here’s the link to buy the same image on Adobe Stock.
Moerie has removed the page and image since we called out this information.
We consider these claims to be a red flag about the brand's ethics.
Real People Try Moerie
A YouTube creator named Laura Cristina has a Moerie review video that includes before-and-after images:
A TikTok user named “My Rapunzel Hair Journey” shares a before-and-after image using some Moerie hair products:
@myrapunzelhairjourney Honest Moerie results after one use without any styling or other product. #moerie#moeriebeauty#moeriehair#moeriehairgrowth#hairgrowth#hairgrowthjourney#hairhealth#growmyhair#siliconefree#shampooandconditioner#rapunzel#hairtok#growmyhairlong#growmyhair#manifestinglonghair#manifesthairgrowth#harecare#moerieresults#moeriebeforeandafter#beforeandafterhair#longhair#fyp#blondehair#bleachedhair#hairwashday#longhealthyhair 💛 Moerie can you pretty please make me a #moeriepartner ♬ Sunny Day - Ted Fresco
Our Clean Hair Growth Picks
Happy Head Topical is our top hair growth solution.
This formulation uses FDA-approved hair loss ingredients like minoxidil which is clinically shown to increase hair count by 11%.
Ritual HyaCera is our top hair growth supplement.
This supplement contains wheat oil extract, and a 2024 clinical trial reported that a wheat lipid complex had "a reducing effect on hair shedding and a stimulating effect on hair reappearance and growth."
MBG Omega-3 Potency+ is our top hair thickness pick.
Supplementation with omega-3 fats and antioxidants is clinically shown to improve hair density, and MBG's supplement contains both.
All of the products recommended in this section are entirely free of ingredients we consider to be unhealthy.
Customers Rate Moerie
Amazon is a better resource for honest customer reviews than a brand’s website in our opinion.
Moerie Ultimate Hair Growth Spray has been reviewed over 2,500 times on Amazon, and currently has an average review rating of 4.1 out of 5 stars.
A top positive review from a verified purchaser comes from a user named “armartinez” who gave the product a 5/5 rating:
“I have had growth and I do believe it’s from this because my hair grows super slow in the winter, the hair loss has been less and my hair looks health and shiny.”
A top negative review from a verified purchaser is written by a user named “Flymariposa” who gave the product a 1/5 rating:
“I bought this product to help with my hair growth. I can hardly use it due to the horrible smell. It smells like janitorial cleaning fluid. So I honestly don’t know if the product is working or not. I just can’t stand the smell. So I have not used it completely up.”
Moerie has also received some complaints on the Better Business Bureau (BBB) website, and the brand has failed to respond to any of the complaints at the time of updating this article, which is a sign of low brand quality.
A BBB user named “Nicole P” claims the company overcharged her and won’t resolve the situation:
“These products do not work. The reviews are a scam. This business charges you three times the amount and calls it a subscription. There is no way to resolve this issue because the company does not return emails and they just keep charging you for the product.”
Moerie Pros and Cons
Here are the pros and cons of Moerie in our opinion:
Pros:
- Ultimate Hair Growth Spray has research-backed ingredients
- Ultimate Hair Growth Shampoo has research-backed ingredients
- Brand significantly improved both formulations since our initial review
- Mostly positive Amazon reviews
- Both products reviewed were fragrance-free
Cons:
- "Health quiz" results may be fake based on our tests
- Questionable media claims we called out
- Questionable team claims we called out
- Questionable clinical claims we called out
- Moerie has removed a number of uncited claims from their site since we called them out
- Both products reviewed contain phenoxyethanol
- Negative BBB rating
- Brand fails to respond to customer complaints on the BBB site
