Nulastin Review: Are Revitalized Lashes Possible?

Nulastin Review: Are Revitalized Lashes Possible?

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Nulastin is a cosmetics company that sells products for improving the apperance of eyebrows, lashes, hair and skin. Their most popular product is a serum applied to the eyebrows used to increase their thickness.

But can topical treatments actually improve quality and apperance of lashes and eyebrows? Does Nulastin use science-backed ingredients? Does it contain any harmful additive ingredients? Has the company funded any studies proving their products work?

In this article we’ll answer all of these questions and more as we review every ingredient in Nulastin's brow serum and lash serum. We'll highlight issues we have with the company's "clinical studies," and share real, unsponsored user reviews of their most popular products.

Questionable Clinical Studies

Nulastin clinical claims


Nulastin claims their products are “clinically proven” to work and features a Science page on their website with several studies which test the effectiveness of their products. 

We do not consider research paid for by brands and conducted by for-profit research firms to be clinical research that’s valuable to consumers, because of the risk of bias.

None of the studies funded by Nulastin appear to be published in peer-reviewed scientific journals, like the ones we cite in our articles when we evaluate product health claims.

We recommend that consumers entirely disregard claims of clinical efficacy made by brands based on research that the brands fund themselves, and that is not published in peer-reviewed scientific journals.

As a consumer, ask yourself when was the last time you saw a company publish “clinical research” on their website which suggested their products were not effective. We’ve never seen it, and we’ve reviewed hundreds of products. That alone proves the bias regarding company-funded research.

We do not consider any of the research funded by Nulastin to be useful to consumers, and we urge the brand to remove all claims that their products are "clinically proven" to be effective if they have not been shown so in a clinical trial that's published in a scientific or medical journal.

Nulastin Brow Serum Review

Nulastin Brow Serum ingredients

Nulastin’s most popular product is their brow serum, which claims to thicken and lengthen eyebrows. The serum costs $79 for 0.1 fluid ounces (oz), which equates to around $12,000 per pound. This is more than 50% of the price of gold per pound at the time of updating this article.

The first active ingredient in Nulastin Brow Serum is myristoyl pentapeptide-17. A clinical trial published in the Journal of Clinical and Aesthetic Dermatology described this ingredient as having the "potential to stimulate eyelash growth" based on its ability to stimulate keratin production, which is a structural protein in hair.

We haven't come across any human trials proving this ingredient to be effective, so we'll consider it potentially effective.

Tropoelastin is produced by the body. We cannot identify any medical research suggesting this ingredient stimulates hair production or improves hair quality.

Keratin is the third ingredient in Nulastin. It’s the main structural protein in hair. There is some research suggesting that topically-applied keratin can improve hair quality, however the linked study used keratin-based particles formed by combining keratin and silk fibroin.

Another medical trial found that a recombinant keratin protein (chemically manipulated protein with modified gene sequences) was effective in treating damaged hair.

Since both of the medical studies above use a different form of keratin than Nulastin, we'll consider this ingredient potentially effective.

Hepatocyte growth factor has been shown in clinical research to stimulate hair growth, however there isn't enough research on the safety of this compound for us to recommend it. This compound is a cytokine, which means it can modulate immune system function, so a significant amount of safety data needs to be published before this ingredient should be used on humans in our opinion.

Phenoxyethanol is a synthetic preservative that we recommend avoiding. As we referenced in our Seint Makeup reviews article, clinical data has shown this ingredient to be toxic to human cells.

Triethanolamine is a pH balancer that was found in an animal study to be carcinogenic, which means it's potentially cancer-causing. The study authors stated that "there was equivocal evidence of carcinogenic activity of triethanolamine."

Overall we consider Nulastin Brow Serum to be potentially effective for increasing length and thickness of eyebrows, but we don't recommend it due to the inclusion of several questionable additive ingredients.

One of the most popular reviews of Nulastin Brow Serum comes from a YouTube channel called "Magical Muses & Monthly Musings" and includes before-and-after images:


Nulastin Lash Serum Review

Nulastin Lash Follicle Fortifying Serum contains the exact same ingredients, in the exact same order, at the exact same price of their brow serum.

We find it to be strange that Nulastin is using the exact same formulation to make different health claims about different body parts. The same ingredients are “follicle fortifying” for the lashes, and “shape altering” for the eyebrows. We consider these uncited claims to be unscientific, especially considering these varying claims are based on the exact same ingredient formulation.

We do not recommend this product.

Nulastin claims their brow formulation is “concentrated” and does not list this descriptor on their lash formulation, but they don’t explain which ingredients are concentrated and to what concentration/dosage.

Does Nulastin Cause Side Effects?

Consumers are often curious about whether Nulastin is likely to cause side effects, given that it's applied near the eyes which is a sensitive area with thin skin.

We believe that Nulastin carries some risk of eye and skin irritation due to the use of triethanolamine. This ingredient is a known cosmetic irritant, and was even used as a negative reference standard in a 2008 clinical trial on ocular irritants.

This means that triethanolamine is so well-known for causing eye irritation that researchers compared other ingredients against it to see which ingredients caused less irritation and may make better cosmetic ingredients.

Nulastin's "clinical trial" on their lash serum that they published on their website did not even include details about side effects, which further proves our point about why company-funded studies are not useful to consumers.

Nulastin Real Customer Reviews

Nulastin is sold on Amazon, which is a more objective resource for customer reviews than a brand's website in our opinion.

The brand's most popular product on Amazon is their Brow Serum, which has been reviewed over 400 times and has an average review rating of 3.8 out of 5 stars. The product has an "A" grade on Fakespot, which is a software tool that detects potentially fake Amazon reviews. This is a good sign that all of the reviews are likely legitimate.

The top positive review from a verified purchaser is written by a user named "Emily Nelson" who claims Nulastin Brow Serum improved her apperance:

"I have a friend who uses BOTH the NULASTIN brow and lash serums and swears by them so I had to try it out. Even just after a few weeks (using morning and night) I am starting to notice a difference. My brows look like I slightly filled them in with eyebrow pencil!"

The top negative review from a verified purchaser comes from a user named "Cindy" who claims the product is ineffective:

"There isn't enough product in the tiny tubes to do anything! For the high price there should be enough product to try it long enough to see if it will even work. Starting the second tube after 3 weeks of trying to get enough product on the brush to apply it out of the first tube. Second tube has less product in it than the first. No results at all. Waste of money!"

Our Non-Toxic Lash Boost Recommendation

We recommend a product called Organic Eyelash and Eyebrow Growth Serum from a brand called Live Fraiche.

This product has one single ingredient: organic castor oil, and most importantly it's entirely free of questionable filler ingredients like preservatives.

A medical review published in the Journal of Drugs in Dermatology described castor oil as having the potential to improve hair quality, and while we don't believe the medical evidence on castor oil for hair growth is particularly convincing, we definitely consider this to be a healthier option than commercial eyelash and eyebrow serums, and may be worth trying.

Live Fraiche's eyelash serum costs only $22 for 0.35 fluid ounces, while Nulastin costs $79 for 0.1 fluid ounces.

Interested consumers can check out Live Fraiche Organic Eyelash and Eyebrow Growth Serum at this link to its Amazon product page.

Stay up-to-date on our research reviews


While we consider Nulastin to be potentially effective for improving eyelash and eyebrow quality and thickness, we do not recommend the product overall due to the inclusion of several ingredients with questionable health effects that we would not recommend using near the eyes.

Nulastin is extremely expensive given the small portion size (0.1 fluid ounces).

Nulastin contains an ingredient called triethanolamine that's shown to be a cosmetic irritant in medical trials, and which we believe may cause side effects.

We urge Nulastin to remove statements of clinical efficacy from their website, given that these statements are based on self-funded trials that do not appear to be published in any peer-reviewed scientific or medical journals.

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