Key Takeaways

• Our Trybello serum costs $39.95 with free shipping, Cosnori sells for about $22, and UKLASH costs $55 one-time or $44 on subscription.
• Our Trybello 2-in-1 serum pairs a growth serum with a volumizing mascara and skips prostaglandin analogs, while UKLASH relies on isopropyl cloprostenate and Cosnori uses a peptide blend.
  
• Trybello's result timeline runs four weeks, Cosnori advertises fuller lashes in about two weeks, and UKLASH sets an expectation of four to six weeks for visible change.
  
• All three rate highly, but our Trybello range stands out with a 4.8 from 40,000+ customers citing reduced fallout and easier recovery after extensions, matching UKLASH's 4.8 and edging Cosnori's 4.7.
• We back the Trybello 2-in-1 serum with a 60-day money-back guarantee and free shipping on every order, so you can try the four-week timeline risk-free.

What Separates Cosnori, UKLASH, & Trybello

The biggest divide between these three serums isn't price, but what goes into the bottle. UKLASH uses a prostaglandin analog to drive growth, while Cosnori and our Trybello serum both skip that ingredient, which matters to buyers watching for side effects like irritation or eye color change.

How you apply each one differs just as much. UKLASH is limited to the upper lash line and is not advised during pregnancy or nursing. Cosnori is pH-matched to tears and cleared for use after extensions, while our Trybello serum works on upper lashes, lower lashes, and brows.

We built the Trybello 2-in-1 serum for anyone who wants growth support and daily wear from one product, since the serum and mascara share a single tube.

“100% Natural Serum Delivers Visibly Longer, Fuller Lashes in Just 30 Days. The Safe Alternative to Extensions!"

Transform your lashes naturally with our plant-based formula, rated 4.8/5 by 40,000+ real customers, free from oils, hormones, silicones, and harsh chemicals.

Proven Natural Ingredients

• • Panax Ginseng – Revitalizes follicles for accelerated growth
• • Pumpkin Seed Extract – Restores and strengthens natural lashes
• • Grape Seed Extract – Reduces breakage for fuller lashes

Clean Beauty You Can Trust

• • Gluten-free, fragrance-free, no parabens
• • Works on upper, lower lashes, and eyebrows

60-Day Guarantee: No results? 100% money back.

Get Trybello Eyelash Growth Serum →

Trybello 2-in-1 Eyelash Growth Serum

Our Trybello serum carries a growth serum on one end of the wand and a volumizing mascara on the other. The formula pairs Pentapeptide-17 with Panax ginseng, pumpkin seed extract, and grape seed extract, plus hyaluronic acid, biotin, and panthenol.

It contains no oils, hormones, silicones, or prostaglandin analogs. Apply once daily in the morning, with additional applications as needed. Noticeable results appear in four weeks.

Trybello's 2-in-1 dual wand combines an eyelash growth serum and volumizing mascara in one daily-use product.

Cosnori Long Active Eyelash Serum

Cosnori is a Korean lash serum sold in a 9g (0.3 fl oz) tube. Its named actives are Myristoyl Pentapeptide-17 and Copper Tripeptide-1, alongside Centella asiatica extract, sodium hyaluronate, and tocopherol, on a water and glycol base.

The base is oil-free and water-based, pH-matched to tears, and has passed a low-irritation skin test for daily use, including after lash extensions. The applicator has two ends: a C-curled brush that coats the lash from root to tip, and a ball tip that delivers product between the lash roots. Cosnori positions the serum for thin or inelastic lashes and for lashes weakened by extensions or perms.

Cosnori's water-based lash serum features a dual applicator designed for thin, weakened, or extension-damaged lashes. (Image Courtesy of Amazon)

UKLASH Lash Serum

The formula combines Vitamin B5 (Panthenol), green tea extract, Biotinoyl Tripeptide-1 and Myristoyl Pentapeptide-17. It also contains isopropyl cloprostenate, listed on the product page as a low and safe level of a prostaglandin analog. The brand directs buyers who prefer to avoid it toward its Complex Peptide and Sensitive serums, both priced at $55.

Application is one stroke to the upper lash line only, once daily. UKLASH advises against use on the lower lash line and during pregnancy or nursing.

UKLASH Eyelash Serum uses peptides and a prostaglandin analog to promote longer, fuller lashes with once-daily application. (Image Courtesy of UKLASH)

Price Comparison

Our Trybello serum is $39.95, reduced from $49.95, with free shipping on all orders. The mascara is part of the same wand, so the price covers a step that would otherwise be a separate purchase.

Ulta lists the Cosnori Long Active Eyelash Serum at $22.00. Olive Young US charges $22.43 with free shipping over $35.

A single 3ml UKLASH tube is $55 as a one-time purchase, or $44 on subscription, which applies an extra 20% off the first order and 15% off subsequent orders. The two-tube duo pack is $99 instead of $110, but that bundle is excluded from the brand's money-back guarantee.

Results & Timelines

Cosnori

Cosnori's retail listings advertise stronger, fuller lashes in around two weeks. Its usage guidance is longer, recommending consistent application for a month or more, since a lash growth cycle runs roughly seven to eight weeks. The two-week claim covers conditioning and shine, not added length.

UKLASH

UKLASH advertises visibly longer lashes in as little as 25 days. Its FAQ sets a longer expectation of four to six weeks for visible results and twelve weeks for fuller ones. The published stages run from nourishment in weeks one to four, visible change at four to six, clearer volume at six to eight, and full results by twelve, followed by maintenance three to four times weekly.

Trybello

We work to a four-week timeline. Weeks one and two are the consistency phase, when daily application matters most even though little shows yet. Growth starts to become noticeable around week three, and by week four most consistent users see visibly longer, fuller lashes.

Condition improves before length does. Reduced fallout and healthier-feeling lashes tend to show up first, ahead of any real change you can measure. We recommend applying once each morning, with extra applications as needed. Missing a day is not a reset, so just apply the next day and keep going.

Customer Reviews

Olive Young US rates the Cosnori serum 4.7 out of 5 across 3,000+ reviews. Its smaller Ulta listing sits at 4.9 from 14 reviews, where buyers cite the applicator and the absence of irritation. One reviewer reported stinging after accidental eye contact, and another found the formula crusty when over-applied.

UKLASH holds 4.8 out of 5 from over 50,000 reviews. The site's review summary reports visible results for many users within three to eight weeks, minor irritation or redness for some, and no change for a small number despite regular use.

Trybello is rated 4.8 out of 5 by more than 40,000 customers across our range. Recurring themes in our lash feedback include recovery after extension wear, reduced fallout, and a visible difference within the first month.

Trybello customers report fuller, healthier lashes and recovery after extension wear, with visible results within the first month.

Cosnori vs UKLASH vs Trybello: Comparison Table

Grow Fuller Lashes in Four Weeks with Trybello

Trybello's 2-in-1 serum combines plant-based growth actives with volumizing mascara at $39.95, backed by a 60-day money-back guarantee.

Price, formula, and timeline pull in different directions across these three serums. The lowest-priced asks for the most patience, the priciest carries a prostaglandin analog many buyers would rather avoid, and each one usually makes you give up something to get the rest.

The Trybello 2-in-1 serum is built to close that gap. You get a plant-based formula with no prostaglandin analog, a four-week timeline that beats the wait time of most inexpensive options, and a volumizing mascara on the same tube, all for $39.95 with free shipping. If your lashes do not change after four consistent weeks, our 60-day guarantee returns your money. Order your Trybello Lash serum today.

Frequently Asked Questions (FAQs)