Tired of sparse, over-plucked brows that never seem to grow back? We’ve all been there—whether it’s years of aggressive tweezing, naturally thin brows, or simply wanting that fuller, more defined look without resorting to daily makeup routines. Finding a brow serum that actually delivers on its promises can feel like searching for a needle in a haystack.
That’s why we’re reviewing the neuBROW Brow Enhancing Serum by Skin Research Laboratories, a best-selling formula designed to promote the natural, healthy appearance of fuller, thicker-looking brows. This advanced serum has been making waves in the beauty community, and we wanted to see if it lives up to the buzz.
In this review, we’ll dive deep into the formula’s key ingredients, examine what real customers are reporting in their feedback (it currently holds a 4.1-star rating from 90 reviews), explore the application process and texture, and help you determine whether this serum is right for your brow goals. As clean beauty enthusiasts who understand the frustration of products that overpromise and underdeliver, we’re committed to giving you an honest, thorough assessment to help you make an informed decision about whether neuBROW deserves a spot in your beauty routine.
Product overview and What Makes neuBROW Different
We’ll be honest—we approached neuBROW Brow Enhancing Serum with our fair share of skepticism, as many beauty enthusiasts do when it comes to growth serums. This brow treatment from Skin Research Laboratories has positioned itself as a solution for those of us dealing with sparse, over-plucked, or naturally thin eyebrows.The brand claims their advanced formula promotes the natural and healthy appearance of brows, working to create fuller, thicker-looking brow hair over time. What immediately caught our attention in researching this product is the inclusion of isopropyl cloprostenate, a synthetic prostaglandin analog that’s known in the beauty community for its hair growth-stimulating properties. this ingredient works by potentially extending the growth phase of hair follicles, though it’s worth noting that prostaglandin analogs can cause sensitivity in some users (more on that in our experience section).
What sets neuBROW apart from other brow serums we’ve researched is its dual-action approach—customers report that it not only works as a treatment serum but also functions as a brow mascara for immediate styling, which means you’re getting both long-term growth support and instant grooming benefits. The product comes in a compact tube (approximately 1.76 ounces according to packaging specs) with a mascara-style applicator that makes targeted application straightforward.According to the manufacturer’s instructions, the serum is designed for twice-daily application—morning and evening—as part of your regular beauty routine. We appreciate that Skin Research Laboratories has been transparent about the commitment required: this isn’t an overnight miracle product, and both the brand and numerous customer reviews emphasize that consistent use over 30-60 days is necesary to see visible results.
application Experience and How to Use for Best Results
We found that applying neuBROW requires consistency and patience, but customers report the disciplined routine pays off. The brand recommends applying the serum twice daily—morning and evening—directly to clean, dry brows along the brow line where you want to encourage growth. Many reviewers emphasize that skipping applications can slow progress, with one user noting “do not skip application (morning & bedtime)” for optimal results. We appreciate that a little product goes a long way; customers consistently mention you don’t need much per application, which helps extend the bottle’s life. The serum absorbs quickly without leaving a sticky residue, making it easy to incorporate into your existing beauty routine before applying other brow products. One reviewer shared an fascinating bonus: “this doubles as a brow mascara so I no longer need to use my air brow,” suggesting the formula also conditions existing hairs for a fuller appearance throughout the day.
The timeline for visible results varies among users, but most customers noticed changes between 4-6 weeks of consistent use. One 50-year-old reviewer reported “it takes a month of disciplined use to see it working and then it builds from there,” while another saw “noticeably fuller” brows after just 30 days and was “thrilled” by 60 days. We want to be transparent about maintenance: several long-term users warn that discontinuing use can result in brows thinning out again, so this is a commitment rather than a one-time fix. Regarding bottle longevity, experiences differ—while the brand claims 8-12 weeks of treatment per tube, most customers report their bottles lasting closer to one month (4-6 weeks) with twice-daily application, which factors into the overall cost consideration. Vital safety note: this serum contains isopropyl cloprostenate, a prostaglandin analog, which one reviewer had a severe reaction to despite using eyelash serums without issue. We strongly recommend patch testing on your inner arm for 24-48 hours before applying to your brow area,especially if you have sensitive skin or a history of reactions to cosmetic products.
Read All Verified customer Reviews
Real Results Timeline and What We Noticed
Based on customer experiences, we noticed that patience is absolutely essential with this brow serum—most reviewers reported seeing initial changes around the 4-week mark, with more dramatic improvements becoming visible after 6-8 weeks of consistent twice-daily application. One long-term user noted that after a month of disciplined use, “you can see it working and then it builds from there,” while another customer shared that after 30 days their brows were “noticeably fuller” and by 60 days they were “thrilled” with the results. We found it interesting that several reviewers emphasized the importance of not skipping applications—morning and evening use appears to be the sweet spot for optimal results. The serum contains isopropyl cloprostenate, a prostaglandin analog that works by extending the growth phase of hair follicles, which explains why consistent application over several weeks is necessary to see meaningful changes in brow density.
What really stood out to us in the reviews was the consistency of results for those dealing with over-plucked or cosmetically damaged brows—multiple customers specifically mentioned regrowing areas that hadn’t filled in naturally for years. One reviewer noted their brows at age 50 are “a LOT thicker than they were over 20 years ago” thanks to continued use of this product. Though, we also noticed an critically importent pattern: maintenance is required. Several users mentioned that when they stopped using the serum, their brows began to thin out again, which makes sense given how prostaglandin analogs work—they support the active growth phase but don’t permanently alter your natural hair growth cycle. One word of caution we want to highlight: a small number of customers reported reactions to the prostaglandin analog ingredient, with one experiencing facial itching and eye swelling after just a few days. If you have sensitive skin or a history of reactions to lash serums, we’d strongly recommend doing a patch test on your inner arm for 48 hours before applying this to the delicate brow area.
Is It Worth the Investment Compared to Other Brow Serums
We’re not going to sugarcoat it—neuBROW sits at a higher price point than many drugstore brow serums, and this is the aspect that comes up most frequently in customer feedback. reviewers consistently mention that the bottle lasts approximately 4-6 weeks with twice-daily application, which is notably shorter than the brand’s claim of 8-12 weeks of treatment. One customer candidly shared, “I was definitely out after 6 weeks, and I don’t apply it like crazy or anything.No way I could have made it to 8 or 12 weeks.” This means if you’re committed to the regimen, you’re looking at a monthly investment to maintain results. However, many long-term users tell us the results justify the cost.As one reviewer who’s been using it for years explained, “It is pricey but worth it. The one thing in my beauty regimen I will not go without.” Several customers mention they’ve tried comparable serums like GrandeBrow before switching to neuBROW, with one noting they achieved better results with this formula even when using it just once daily instead of twice.
What sets this serum apart in the crowded brow-enhancing market is its formulation with isopropyl cloprostenate, a prostaglandin analog that’s the active ingredient responsible for promoting hair growth. This is the same category of ingredient found in many higher-end lash and brow serums, which explains both the efficacy and the price point. Customers report seeing noticeable thickness after about 4-6 weeks of consistent use, with one 50-year-old reviewer sharing, “Looking back at old photos of myself I can see my brows were always patchy and thin. Aged 50 now, my brows are a LOT thicker than they were over 20 years ago.” That said, we need to mention an important consideration: this active ingredient can cause reactions in some users. One customer experienced painful itching and eye swelling after just a couple days of use, which resolved after discontinuation. We strongly recommend doing a patch test before committing to full application, especially if you have sensitive skin or have had reactions to eyelash serums in the past. the value equation ultimately depends on your brow goals and budget—if you’re dealing with over-plucked or naturally sparse brows and can commit to the ongoing cost, reviewers suggest this delivers results that microblading touch-ups can’t match.
Customer reviews Analysis
Real User Experiences
Overall Sentiment and Rating Overview
The neuBROW Brow Enhancing Serum receives predominantly positive feedback from users, with most reviewers reporting visible brow growth and increased fullness. The majority of customers express satisfaction with the product’s effectiveness, though several note concerns about the high price point and product longevity. A small number of users experienced adverse reactions, highlighting the importance of checking ingredient compatibility before use.
Results Timeline and Expectations
First 2 Weeks:
Reviewers report no immediate visible changes during the initial application period. Users emphasize the importance of consistent, twice-daily application during this phase.
3-4 Weeks:
Multiple customers mention beginning to notice new hair growth around the one-month mark. One reviewer states, ”After just 30 days of regular use as specified, my eyebrows are noticeably fuller and are starting to look full again.”
6-8 Weeks:
This timeframe appears to be when most important results become apparent. One user notes, “I’ve had sparse brows my entire life, and this product has undeniably made them thicker (more hair growth— hair texture still remained the same) after about 6 weeks.”
2+ months:
Long-term users report sustained improvement with continued use. A 60-day user shares: “After 60 days I am thrilled at my new look!” Several reviewers emphasize that maintenance requires ongoing application, with one noting, “If you stop they thin out again.”
Texture, Scent, and Application Feedback
The reviews provided limited specific feedback on texture and scent. One reviewer mentions the product “doubles as a brow mascara,” suggesting a somewhat visible or tinted formula.Users consistently recommend applying the serum twice daily (morning and evening) for optimal results, with one noting “You do not need much” per application.
Common Praise
Effectiveness for over-Plucked Brows:
Multiple reviewers specifically mention success in regrowing brows after years of over-plucking. One long-term user states, “I credit the fact that my over plucked eyebrows re-grew and regenerated themselves solely to this product.”
Noticeable Growth:
Several customers describe results as significant, with one 50-year-old user reporting, “My brows are a LOT thicker than they were over 20 years ago.” Another excited reviewer notes,”This product works sooo well!!!” comparing it favorably to GrandeBrow and even microblading results.
Dual Functionality:
One customer appreciates that the serum can double as a brow mascara,eliminating the need for additional brow products during application.
Common Concerns
Cost and Product longevity:
The price point is consistently mentioned as a significant drawback. Multiple reviewers note the bottle lasts approximately 4-6 weeks with twice-daily use, which is notably shorter than the advertised 8-12 weeks. One user specifically states, “I was definitely out after 6 weeks, and I don’t apply it like crazy or anything. No way I could have made it to 8 or 12 weeks.”
Ongoing Maintenance Required:
Several users emphasize that results are not permanent. One reviewer warns, ”You have to maintain – if you stop they thin out again,” which adds to the long-term cost consideration.
Adverse Reactions:
One reviewer experienced a severe allergic reaction to the product, specifically identifying the ingredient isopropyl cloprostenate (a prostaglandin analog) as the cause. They report: “After only a couple of days of use my face slowly started getting very painfully itchy and then eyes started to swell as well.” This reviewer had previously used eyelash serums without issue, suggesting individual sensitivity varies.
Skin Type and sensitivity experiences
While most reviews don’t specify skin types, the sensitivity concern is notable. The one documented adverse reaction was severe enough to cause facial itching and eye swelling within days of use. However, the majority of reviewers report no sensitivity issues, even with application near the delicate eye area.
Notable Before/After Mentions
One reviewer provided photographic evidence, noting “The photo is of my eye with no editing whatsoever other than cropping the picture to try and get a fair comparison,” showing visible brow regrowth after consistent use. This same user describes their transformation from “patchy and thin” brows to significantly thicker brows at age 50.
Another user mentions avoiding a microblading touch-up due to the product’s effectiveness: “I only have one small section that needs to fill in & I won’t need a micro blade touch up.”
Bottom Line: The majority of reviewers report real brow growth with disciplined, twice-daily use over 4-8 weeks, especially for sparse or over-plucked brows. However, shoppers should weigh the ongoing cost (bottles lasting 4-6 weeks rather than advertised 8-12 weeks), the need for continuous maintenance, and potential sensitivity to prostaglandin analogs before purchasing. Those with a history of reactions to lash/brow serums should patch test or consult with a healthcare provider first.
Pros & Cons
What Skin Will Love
- Lightweight Serum Texture: Absorbs quickly into brow area skin without leaving tacky residue that could interfere with makeup application
- Targeted Application System: Precision applicator delivers controlled amount directly to brow skin, minimizing product waste and avoiding migration to surrounding eye area
- Dual-Function Formula: Acts as both treatment serum and brow grooming product, reducing steps in skincare and makeup routine
- Hydrating base Ingredients: Contains humectants that condition the delicate skin beneath brows while treating hair follicles
- non-Comedogenic Application: Serum formulation designed not to clog pores in the brow and forehead zone, suitable for acne-prone skin types
- Cruelty-Free and Vegan Certified: Ethical formulation aligns with clean beauty preferences without animal-derived ingredients
Things to Consider
- Contains Prostaglandin Analog (Isopropyl Cloprostenate): multiple users with sensitive skin reported severe itching, facial swelling, and allergic reactions within days of use; patch test essential before full application
- Continuous Use Required for Results: Customers report brows thin out again after discontinuing, requiring ongoing investment and daily application commitment rather than permanent improvement
- product Depletion Faster Than Claimed: Several reviewers ran out after 5-6 weeks despite advertised 8-12 week supply, increasing cost per treatment cycle significantly
- Premium Price Point: At approximately $30-40+ per bottle lasting only 1-1.5 months with twice-daily use, ongoing maintenance becomes expensive compared to drugstore brow treatments
Q&A
How long before I see results?
Based on customer reviews, most users notice visible brow growth within 4-6 weeks of consistent use. Some reviewers report seeing initial changes around the 30-day mark, with more dramatic results by 60 days. The key is disciplined,twice-daily application without skipping. Remember that results vary by individual—factors like the extent of brow damage, natural hair growth cycles, and consistency of use all play a role. Be patient and stick with the routine for at least 6-8 weeks before evaluating effectiveness.
How often should I apply this serum?
The brand recommends twice-daily application—morning and evening—for optimal results. Users who have seen the most dramatic growth emphasize the importance of not skipping applications and making it part of your daily routine. Some customers have successfully maintained results with once-daily application after achieving their desired brow thickness, though this may extend the maintenance phase. Apply to clean brows before other skincare or makeup products.
How long does one bottle last?
Customer experiences vary, but most report one bottle lasting approximately 4-6 weeks with twice-daily use. While the product is advertised to provide 8-12 weeks of treatment, actual usage reviews indicate shorter duration—typically around one month. A little goes a long way, so avoid over-applying. once you achieve your desired results, some users report extending bottle life by switching to maintenance mode with once-daily application or targeted application only where needed.
What happens if I stop using the serum?
Multiple reviewers note that brow thickness decreases if you discontinue use—the results are not permanent.This is an ongoing maintenance product rather than a one-time treatment. Users report that their brows gradually thin out again after stopping application. To maintain your results, you’ll need to continue regular use, though some find they can reduce frequency to once daily or every other day once they’ve achieved their desired brow fullness.
Is this suitable for sensitive skin or eyes?
this serum contains isopropyl cloprostenate, a prostaglandin analog that some users may be sensitive to.While many customers use it without issues, some have reported reactions including itching, facial irritation, and eye swelling—even users who’ve had no problems with eyelash serums in the past.always patch test before full application, especially if you have sensitive skin or a history of reactions to beauty products. If you experience any irritation,redness,or swelling,discontinue use immediately and consult a healthcare provider.
What are the active ingredients?
The key active ingredient is isopropyl cloprostenate,a synthetic prostaglandin analog that promotes hair growth by extending the growth phase of the hair cycle. This is a potent ingredient commonly found in lash and brow growth serums. If you have concerns about this ingredient or any sensitivities to prostaglandin analogs, review the full ingredient list on the packaging or consult with a dermatologist before use.
Does this work for over-plucked or damaged brows?
Yes! Multiple reviewers specifically mention success regrowing brows damaged by over-plucking, threading, or overzealous waxing—even after years of no regrowth.Users report that previously sparse, patchy areas filled in with consistent use over 1-3 months. One reviewer noted their 50-year-old brows are now thicker than they were 20 years ago. However, results depend on whether hair follicles are still viable; severely damaged follicles may not respond. Set realistic expectations and give it at least 6-8 weeks of consistent use.
Can I use this under makeup or with other brow products?
Yes, apply the serum to clean brows first and allow it to absorb before applying makeup. Some users report that the serum itself has a slight tinting or mascara-like effect that enhances brow appearance, potentially reducing the need for additional brow products. For best results, apply the serum on bare brows as the first step in your routine. in the evening,ensure brows are clean and makeup-free before application.
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Conclusion
The neuBROW Brow Enhancing Serum features isopropyl cloprostenate, a synthetic prostaglandin analog that encourages hair growth, along with conditioning agents to support overall brow health. The serum applies with a precision brush applicator and absorbs quickly into the brow line. Customer feedback consistently highlights visible results within 4-6 weeks of twice-daily application, with many noting significantly fuller, denser-looking brows after continued use.
Best For: Those with over-plucked, sparse, or thinning eyebrows seeking a concentrated treatment to promote the appearance of fuller brows. Particularly suited for individuals committed to a consistent twice-daily application routine and willing to maintain long-term use for sustained results.
Consider Alternatives If: You’re sensitive to prostaglandin analogs or synthetic hormones, as some users report irritation or allergic reactions. If you’re seeking a budget-friendly option, the $40+ price point and monthly replacement may not align with tighter budgets. Those wanting immediate results should look elsewhere—this requires 4-6 weeks minimum.
Skincare Tip: Always patch test products containing active growth-promoting ingredients behind your ear for 48 hours before applying near your eyes.
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Remember: Always patch test new products and introduce them gradually into your routine. What works for one person may not work for another, so listen to your skin!