I've tried several eyelash growth serums over the years. Not one of them made any difference and some of them really stung. However, this is the second Diablo serum I've ordered. It seems to help. My... See more
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Review summary
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A most responsive company. Great product. Order acknowledged immediately. Delivery prompt. Customer service 5 star. I have just ordered my third eye lash serum. Used regularly it is super. My las... See more
Ok where to begin. Having reached an age where I noticed my once good lashes have become short and sparse. Having tried that one extortionately priced serum, it wasn't one that I could afford either.... See more
There's a pretty intense learning curve to do this right but once you figure it out, the stuff really works!! I use it to laminate my brows as well as perm my lashes. The adhesive causes an allergic r... See more
Company details
Written by the company
Diablo Cosmetics is your destination for simple at-home beauty products.
Contact info
United Kingdom
- info@diablocosmetics.com
- diablocosmetics.com
4.3
Excellent
2K reviews
No recent history of asking for reviews
This company hasn't invited customers recently, so reviews may not be representative
Replied to 100% of negative reviews
Typically takes over 1 month to reply
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They were quick to respond and gave me…
They were quick to respond and gave me a replacement product.
September 9, 2026
Unprompted review
After surgery I had a really bad spell…
After surgery I had a really bad spell where my lashes almost disappeared. I have been using this for approx 5 weeks and I can already see a massive difference in the length of my lashes. I have just ordered a further bottle and hope to get even better results over the next weeks
September 6, 2026
Unprompted review
Wow excellent customer service!!!
Wow excellent customer service!!!! I changed my mind about a product did not have to return it and got the product that I wanted to exchange for sent out promptly just wow I haven’t had a customer service experience like this in a long time!!
September 4, 2026
Unprompted review
Amazing product and customer service
Automatic addresses on my Chrome browser led my package go all the way to NZ (I live in France)! The customer service team were kind enough to send out a replacement order to my real address. So kind and helpful, and saved me a lot of hassle.
I have been using Diablog Cosmetics now for 4 years, have tried others, but they are the only one that can really lift and curl stubborn straight lashes.
No need to mess around with mascaras which my eyes are pretty sensitive to.
Highly recommend!
September 1, 2026
Unprompted review
This actually works
This actually works! My lashes had become thin and I had difficulties putting mascara on. I started noticing the difference after a few weeks of appliyng the eyelash serum every night. Now I use Diablo Eyelash serum maybe a couple of times a week for maintainance.
August 29, 2026
Unprompted review
Have used this serum for quite a while…
Have used this serum for quite a while now. Just reordered as it really does work as long as you use it regularly. I’m 73 years old and my lashes are lovely
August 28, 2026
Unprompted review
Great company to deal with
Great company to deal with. Prompt delivery and follow up to make sure I was happy with their product. Eyelash serum is fabulous
August 23, 2026
Unprompted review
My eye lashes were very thin using this…
My eye lashes were very thin using this product they have definetly improved.Very pleased.
August 23, 2026
Unprompted review
The lash serum is awful
The lash serum is awful. Been using for a couple of months and my lashes look worse! They are short and thin now and fall out much more than usual. Don’t waste your money on this crap
August 19, 2026
Unprompted review
Reply from Diablo Cosmetics
Thanks for taking the time to review the serum, Monica, and we’re sorry it hasn’t worked out so far. We’d really like to understand what went wrong and help you get a better result. If you email info@diablocosmetics.com with your order number, we’ll take a look and sort out a solution for you.
Kind regards,
Diablo Cosmetics Support
Easy to use website lash serum made…
Easy to use website lash serum made lashes longer and healthier looking only put mascara on tips of lashes
August 20, 2026
Unprompted review
The delivery time is quite long
The delivery time is quite long as it comes from china, it arrived quite battered so no good as a gift and its in quite a cheap looking tube compared to other eyelash serums
August 12, 2026
Unprompted review
Reply from Diablo Cosmetics
Thank you for taking the time to share your feedback. We're sorry to hear that the delivery took longer than expected and that the packaging arrived battered.
As an international online retailer, some of our orders are fulfilled through our international fulfilment network, which can result in longer delivery times than domestic shipping. We understand that this can be disappointing, particularly if the product was intended as a gift.
We'd appreciate the opportunity to investigate this further. Please email info@diablocosmetics.com with your order details. We'll be happy to send you a replacement for your Eyelash Serum.
Thank you again for bringing this to our attention. We value your feedback and hope to have the opportunity to make things right.
Kind regards,
Diablo Cosmetics Support
I had tried other eyelash serums before…
I had tried other eyelash serums before with very little or no results. I then bought the Diablo eyelash serum and was so surprised by how quickly I saw results, not only did my lashes grow longer, I had new growth! All the gaps between my eyelashes started growing eyelashes! I also noticed I wasn't losing eyelashes every day as I seemed to be before starting this serum. Thank you Diablo, your product is amazing!
August 10, 2026
Unprompted review
I would highly recommend Diablo lash…
I would highly recommend Diablo lash serum. This product is amazing, my lashes are longer, thicker and healthier. I have sensitive eyes, but this product does not irritate them at all. The company as a whole are fabulous, easy to use website and fast delivery
August 5, 2026
Unprompted review
Long lashes without eye redness!!!
I saw an ad online and decided to try the Diablo eyelash serum. I’ve used revitalash and grandelash- both worked very well but my eyes were RED and irritated all the time. I didn’t put two and two together and thought red dry eyes were due to allergies, but when i started diablo the redness stops because it DOES NOT have prostaglandins!! Lashes really have grown, not as thick as with prostaglandins but really long! I also had great experience with their customer service- I HIGHLY RECOMMEND THIS PRODUCT!
July 27, 2026
Unprompted review
I'm not going to be able to really…
I'm not going to be able to really write a review it's ran out and haven't been using it for more than 2 weeks feels really dry and like it's finished surely it should last more than 2 weeks.
July 16, 2026
Unprompted review
Reply from Diablo Cosmetics
Thank you for taking the time to share your feedback Denise. We're sorry to learn that your serum appeared to run out after less than two weeks of use. This is certainly not the experience we want our customers to have.
We'd appreciate the opportunity to investigate this further. Please email info@diablocosmetics.com with your order details. We'll be happy to send you a replacement for your Eyelash Serum.
Thank you again for bringing this to our attention. We value your feedback and hope to have the opportunity to make things right.
Kind regards,
Diablo Cosmetics Support
Eyelash serum didn't work for me
Eyelash serum didn't work for me. Used twice for 8-12 weeks, no change seen. Posting here because diablo doesn't post negative reviews so beware. They seem to be a responsive company, and the formula isn't irritating to my eyes or cause darkness.
April 10, 2026
Unprompted review
Reply from Diablo Cosmetics
Thank you for taking the time to share your feedback Steph.
We're sorry to hear that our Eyelash Serum didn't deliver the results you were hoping for, despite your consistent use. We understand how disappointing that can be. While many of our customers experience visible improvements, individual results can vary depending on factors such as natural lash growth cycles, genetics, age, and other individual characteristics.
We're pleased to hear that you found the formula gentle and that it didn't cause irritation or darkening around your eyes.
We’d really like to understand what went wrong and help you get a better result. If you email info@diablocosmetics.com with your order number, we’ll take a look and sort out a solution for you.
Kind regards,
Diablo Cosmetics Support
Unbelievable customer service
Unbelievable customer service. My serum said it was delivered but it wasn’t and they posted a replacement with no charge. The original serum turned up 2 days later. They let me keep that and the replacement as a gift. It’s hard to find good customer service and it makes the experience so much better. Can’t wait to try the serum 🥰
August 1, 2026
Unprompted review
Excellent customer service
This company delivers excellent customer service! Nothing is too much trouble, they respond within 24 hrs..
A great product which does what it says on the tin!⭐️
July 31, 2026
Unprompted review
The best I've tried
I've tried several eyelash growth serums over the years. Not one of them made any difference and some of them really stung. However, this is the second Diablo serum I've ordered. It seems to help. My lashes are possibly a bit longer, if not noticeably much thicker. And the serum is kinder - no stinging at all. I don't expect miracles, so I'm happy that it's doing something positive for me. Ordering and delivery was good too.
July 27, 2026
Unprompted review
Reply from Diablo Cosmetics
Thank you so much for taking the time to share your experience Pam, and for choosing Diablo Eyelash Serum again.
We're delighted to hear that you've found our serum gentle to use and that it has helped improve the appearance of your lashes. It's especially encouraging to know that you experienced no stinging and that the ordering and delivery process met your expectations.
We appreciate your realistic approach and understand that results can vary from person to person. Your feedback means a great deal to us, and we're grateful for your continued support.
Thank you again for your kind review, and we look forward to serving you again in the future.
Kind regards,
Diablo Cosmetics Support
Customer service second to none!
Customer service second to none!
Ŵill let you know results of taking diablo serum when i have given it time to work its magic!
July 26, 2026
Unprompted review
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