★★★★★
Solid lash serum for me. I can put it on and forget about it and my lashes look fuller at the base. I'm still early in, but so far I like it.
Olivia L. · Verified
6 reasons this is the only lash serum worth using.
Most lash serums work in two weeks because they use a drug ingredient from glaucoma eye drops. That's the part nobody prints on the front of the tube. Rosela Nightly leaves it out, so it takes ten to twelve weeks instead of two. Here's why that trade is worth it.
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0%Prostaglandin, the eye-drop ingredient
10 secA night, once
12 wksTo the full result
90Night money-back
★★★★★4.9 from 892 reviews
We read the ingredient lists first. Almost every serum that promised results in two weeks had the same kind of ingredient in it. So we made one that doesn't.
Rosela · makers of the Cover Stick
01
Reason one
The fast ones put a glaucoma-drug ingredient on your eyelid.
Most lash serums that show results in two to four weeks contain a prostaglandin, a drug molecule that appears on the label as isopropyl cloprostenate, bimatoprost, DDDE or MDN. It is the same family of molecule used in glaucoma eye drops. It works. It also comes with side effects: darker eyelids, red or itchy lids, a hollow look under the eye, and in some people the colored part of the eye turns darker and stays that way.
Europe's safety regulator agrees
In February 2026 the EU's Scientific Committee on Consumer Safety concluded that isopropyl cloprostenate, DDDE and MDN cannot be considered safe in cosmetic products for lashes and brows.
Opinion SCCS/1680/25, adopted 2 February 2026
Check your tube. Look for anything ending in -prost, or the letters DDDE or MDN.
- isopropyl cloprostenate
- bimatoprost
- DDDE
- MDN
- added hormones
- silicones
Nightly is 0% prostaglandin. The full ingredient list is on the product page, in order.
02
Reason two
It conditions the lashes you have, so fewer of them break off.
Nightly is a conditioning serum. Five ingredients do the work: arginine, panthenol, biotin, hyaluronic acid and rosemary leaf oil. They condition each lash from base to tip so it is less brittle, breaks less and sheds less. You keep more of the lashes you already have, and as your lash cycle turns over on its own schedule the lash line looks fuller and longer. That is all it does. No drug, no shortcut.
Water-light, clear and oil-free. Dries in about a minute. No sting.
03
Reason three
It takes ten to twelve weeks. That's on purpose.
Nothing conditions a lash in two weeks. A serum that changes lashes that fast is doing it with a drug. Nightly works with your natural lash cycle, so the full result lands at weeks ten to twelve. Here is the honest calendar. Week two looks like nothing, and knowing that in advance is what gets you to week twelve.
Don't wait for reason six
Start your ninety nights tonight.
20% off for presale, on top of the bundle prices. Code NIGHTLY20 is applied for you at checkout.
From $39.20 with the code · 15 ml a tube · 90 nights · 90-night money back04
Reason four
Ten seconds a night. That's the whole routine.
- 1Clean and dry.Take your makeup off, pat the lash line dry.
- 2One stroke at the base.Along the upper lash line, like eyeliner.
- 3Brush through.The spoolie carries it to the tips. Let it dry for a minute. Go to bed.
Nightly uses a spoolie, the small brush a mascara wand has, not a pointed liner tip, so it coats the whole lash instead of painting the lid. Fine over extensions, lifts and tints. Fine with contacts; put them in after it dries.
05
Reason five
Ninety nights, or we refund it and you keep the tube.
One tube is ninety nights. Take a photo on night one and a photo on night ninety, same light, no mascara. If your lashes don't look fuller, email us and we refund every dollar. You don't send anything back.
The guarantee is longer than the product takes to work. A 30-day guarantee on a serum that needs twelve weeks runs out before you can judge it.
- 54¢
- A night at full price
- 44¢
- A night with the code
06
Reason six
It costs less than one extension fill.
A set of extensions is $150 to $250, then $80 to $120 every three weeks for as long as you keep them. The glue and the pulling are why so many people come to a serum in the first place. Nightly is $49 for ninety nights, and it works on the lashes you already have.
| Rosela Nightly | Prostaglandin serums | Extensions | Mascara | |
|---|---|---|---|---|
| Prostaglandin, the eye-drop ingredient | None | Yes | n/a | n/a |
| Risk of permanent eye color change | None | Documented | n/a | n/a |
| Works on your own lashes | Yes | Yes | No | No |
| Cost per month | About $16 | $25 to $50 | $80 to $200 | $10 |
| Time per day | 10 seconds | 10 seconds | Salon visit | 2 minutes |
| Fine with contacts | Yes | Varies | Varies | Yes |
Extension and prostaglandin-serum costs are typical US ranges. Nightly per month is one $49 tube over three months.
What people say
4.9★★★★★ from 892 reviews
★★★★★
Pretty happy with this so far. After six weeks my lashes look longer. I like that the texture is watery and dries quickly. The change was gradual, which I actually preferred.
Avery S. · Verified
★★★★★
Wasn't expecting a huge difference but here we are. My lashes look more even from side to side after a little over two months. The little brush is easy to control, which makes it easy to remember every night.
Ella N.
★★★★★
I've tried a few lash products and this one surprised me. My lashes feel softer and more conditioned after a month. It fits into my routine without adding another complicated step.
Jenna L. · Verified
★★★★★
I like it. Mascara looks better because I have more to work with after a little over two months, although I got some product on the lid the first few times. Overall I'm glad I tried it.
Tessa R.
★★★★☆
Used it for six weeks and my lashes feel softer and more conditioned. No complicated routine, just apply and go. The first week was hard to judge. Still, I'm really happy with it.
Lucy G. · Verified
Reviews from the Rosela Nightly product page. Individual results vary.
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Prices shown in USD with code NIGHTLY20 applied. The bundle discount and the code both show as separate lines at checkout. One use per customer.
- 90-night money back
- Free shipping over $50
- Ships within 24 hours
- 0% prostaglandin
Questions
Before you decide.
How long until I see something?
Weeks one to three look like nothing; that is normal. Most people notice less shedding around weeks four to six and fuller-looking lashes by weeks seven to nine. The full result is at weeks ten to twelve, which is why the guarantee is ninety nights.
Can I use it with extensions or a lash lift?
Yes. Apply it to the base of your natural lashes as usual. It does not affect the glue or the lift.
What about contacts?
Fine. Apply, let it dry for a minute, then put your lenses in.
Will it darken my eyelids or change my eye color?
No. Those effects come from prostaglandin analogues, and Nightly contains none.
What happens when I stop?
Your lashes go back to their normal cycle over a few months. Nothing is taken away; you simply stop conditioning them.
Why not a $15 serum?
You can buy one. Read the label first. If it lists anything ending in -prost, that is the ingredient reason one is about. If it doesn't, ask what is in it and at what strength. Nightly publishes its full list in order and backs it with ninety nights.
Can I use it on brows?
Yes. Brush it through the brow the same way, once a night.
How does the guarantee work?
Use it every night for ninety nights. If you're not happy, email us with your night-one and night-ninety photos and we refund you in full. You keep the tube.
Rosela Nightly