Many of the best-known lash serums get their results from a prostaglandin analog, an ingredient related to the active in certain glaucoma eye drops. They work for a lot of people, but a growing number of shoppers would rather keep that kind of ingredient away from their eyes. Maybe your eyes are sensitive, maybe you wear extensions or contact lenses, or maybe you simply want a formula you feel comfortable using every day for the long term.
If that sounds like you, you are looking for a lash serum without prostaglandin. Below we explain the difference between prostaglandin and prostaglandin-free lash serums, then compare five prostaglandin-free eyelash serums whose current ingredient lists we checked, so you can choose with confidence.
Quick answer: our top pick for the best lash serum without prostaglandin is Shigeru Lash & Brow Growth Serum. It is the prostaglandin-free formula our salon lash artists use every day. It nourishes and strengthens lashes and brows, it is gentle enough for sensitive eyes, it is oil-free and safe with extensions, and a 5 ml bottle lasts 60 days.
Best prostaglandin-free eyelash serums: quick comparison
| Serum | Key ingredients | Size and price* | Best for |
|---|---|---|---|
| Shigeru Lash & Brow Growth Serum | Ten amino acids, Fo-Ti, Blue Lotus | 5 ml, $69 | Best overall |
| Vegamour GRO Volumizing Lash Serum | Red clover, mung bean sprout, acetyl tetrapeptide-3 | 3 ml, $68 | Plant-focused shoppers |
| IGK Look Out Lash & Brow Boosting Peptide Serum | Copper tripeptide-1, acetyl tetrapeptide-3, biotin | 0.11 oz, $49 | Once-a-night routine |
| The Ordinary Multi-Peptide Lash and Brow Serum | Four peptides, caffeine, panthenol | 5 ml, $14.90 | Tight budgets |
| e.l.f. Enhancing Lash & Brow Serum | Hyaluronic acid, green tea, ginseng, castor oil | 0.12 oz, $8 | Lowest price |
*Brand or major retailer list prices in October 2026. We checked each published ingredient list for prostaglandin analogs in October 2026. Prices and formulas change, so check the current label before you buy.
What are prostaglandins in lash serums?
Prostaglandins are natural compounds the body makes. Lab-made versions, called prostaglandin analogs, are used in prescription eye drops for glaucoma, and longer, darker lashes were noticed as a side effect. One of them, bimatoprost, became Latisse, which the American Academy of Ophthalmology describes as the only FDA-approved eyelash growth treatment. It requires a prescription.
Many over-the-counter lash serums use related ingredients. On a label you will most often see isopropyl cloprostenate, and sometimes names such as cloprostenol ethyl amide or dechloro dihydroxy difluoro ethylcloprostenolamide. The American Academy of Ophthalmology notes that these cosmetic ingredients have not been tested and approved by the FDA the way bimatoprost has. It also lists possible side effects of prostaglandin lash treatments, including eye redness and irritation and darkening of the eyelid skin, which go away after stopping, and darkening of the iris, which has been reported and may not reverse.
Many people use prostaglandin serums without any trouble. The point is not that they are dangerous for everyone. It is that some people would rather not take on those possibilities for a cosmetic result, especially when gentler options exist.
Prostaglandin vs prostaglandin-free lash serums: what is the difference?
| Prostaglandin lash serums | Prostaglandin-free lash serums | |
|---|---|---|
| Key ingredient | A prostaglandin analog such as isopropyl cloprostenate | Amino acids, peptides, vitamins and plant extracts |
| How it works | Acts on the lash growth cycle | Nourishes and strengthens lashes so fewer break and more reach full length |
| Typical timeline | Brands often quote 4 to 12 weeks | Brands often quote 4 to 8 weeks; Shigeru about 30 days |
| Possible side effects | Irritation, redness, eyelid darkening; iris darkening reported with prescription bimatoprost | Irritation is possible with any product near the eyes, so patch test |
| Often chosen by | People comfortable with the ingredient who want a well-known formula | Sensitive eyes, extension wearers, long-term daily users |
| Use on brows | Often sold as separate lash and brow products | Many are made for both |
In short: a prostaglandin-free eyelash serum is the gentler route. Results build steadily with consistent use, and you avoid the specific side effects linked to prostaglandin analogs. For most people, and especially anyone with sensitive eyes or lash extensions, we recommend starting prostaglandin-free.
How to check a label for prostaglandin analogs
Brands do not always put "contains prostaglandin" on the front of the box. Read the full ingredient list and look for any name ending in -prost or -prostenol, or containing cloprostenate or cloprostenol. Some brands add "(a prostaglandin analog)" in the list, which helps. If a product only shows key ingredients and not the full list, check the brand site or a major retailer before you buy. The same check applies if you are looking for a brow serum without prostaglandin.
The 5 best lash serums without prostaglandin
1. Shigeru Lash & Brow Growth Serum: best overall
We developed our serum for the lash artists in our Beverly Hills and New York salons, who needed something they could recommend to every client, including those with sensitive eyes and those wearing extensions. It is a prostaglandin-free blend of ten amino acids, the building blocks of the keratin lashes are made of, with Fo-Ti, a botanical long used in traditional Asian hair care, and soothing Blue Lotus flower extract.
- Why it is our top pick: it nourishes and strengthens lashes and brows with no prostaglandin analog, and it is the formula our own lash artists use every day.
- Gentle enough for sensitive eyes: we have used it on hundreds of salon clients with no reported reactions.
- Extension safe: the formula is oil-free, so it will not weaken lash adhesive.
- Results: used morning and night, most people see visibly longer, fuller lashes in about 30 days, with the fullest results at around 60.
- Value: a full 5 ml bottle lasts 60 days at $69.
- Clean: vegan, paraben-free and cruelty-free.
Best for: anyone who wants visible results without a prostaglandin analog, on lashes and brows. See Shigeru Lash & Brow Growth Serum.
2. Vegamour GRO Volumizing Lash Serum: plant-based pick
Vegamour's lash serum is built around red clover and mung bean sprout extract with acetyl tetrapeptide-3. No prostaglandin analog appears on its ingredient list. It is applied to the roots of the upper and lower lashes up to twice a day, and the brand says to expect visible results in as soon as four to six weeks.
Best for: people who want a botanical formula.
3. IGK Look Out Lash & Brow Boosting Peptide Serum: simplest routine
IGK combines copper tripeptide-1 and acetyl tetrapeptide-3 with biotin and red clover flower extract, with no prostaglandin analog listed. It is applied once a night along the upper lash line and to the brows, and is described as fragrance-free and silicone-free.
Best for: people who want one nightly step.
4. The Ordinary Multi-Peptide Lash and Brow Serum: budget pick
At under fifteen dollars for a generous 5 ml, this peptide serum is one of the best values here. It uses four peptides with caffeine and panthenol, is applied morning and evening, and is labeled oil-free, vegan and cruelty-free.
Best for: trying a prostaglandin-free serum at low cost.
5. e.l.f. Enhancing Lash & Brow Serum: lowest price
e.l.f.'s serum combines sodium hyaluronate with larch, green tea and ginseng extracts and a little castor seed oil, with no prostaglandin analog listed. It costs $8 and is applied morning and night. Because it contains an oil, ask your lash artist before using it near extensions.
Best for: the smallest budget.
Who should choose a prostaglandin-free lash serum?
- Sensitive or watery eyes. A gentler formula is the sensible place to start. Patch test any new product for a couple of days.
- Lash extension wearers. Choose an oil-free serum, apply it at the lash line rather than along the extensions, and wait until the bond has set. A stronger natural lash gives each extension a better foundation, which is why so many of our salon clients use one.
- Contact lens wearers. Take lenses out before applying and let the serum dry before putting them back in.
- Light eyes. Some people with hazel, green or blue eyes choose prostaglandin-free because of the reported iris color changes with prescription prostaglandins.
- Brows too. Many prostaglandin-free serums, including ours, are made for lashes and brows.
If you are pregnant or breastfeeding, have an eye condition or use prescription eye drops, ask your doctor before starting any lash serum.
How long does a prostaglandin-free lash serum take to work?
Lashes grow in cycles, so no serum works overnight. Most prostaglandin-free serums quote four to eight weeks for a visible difference. With Shigeru, most people see visibly longer, fuller lashes in about 30 days and the fullest results at around 60. Results fade gradually if you stop. Our guide to whether lash serums really work covers the timeline in more detail.
Our verdict
If you want the best lash serum without prostaglandin, Shigeru Lash & Brow Growth Serum is our top pick. It is gentle enough for sensitive eyes, safe with extensions, works on lashes and brows, and is the formula our lash artists trust on their own clients. Most people see visibly longer, fuller lashes in about 30 days.
Vegamour suits plant-focused shoppers, IGK keeps things to one nightly step, and The Ordinary and e.l.f. are low-cost ways to try a prostaglandin-free formula. For a wider list that includes prostaglandin serums, see our roundup of the best eyelash growth serums of 2026.
Shop Shigeru Lash & Brow Growth Serum
Prostaglandin-free lash serum FAQs
Do non-prostaglandin eyelash serums really work?
Yes, with consistent daily use. They work by nourishing and strengthening lashes, so results build gradually. Give any serum at least two months.
Is a prostaglandin-free lash serum safer?
It avoids the side effects specifically linked to prostaglandin analogs, such as eyelid darkening. Any product used near the eyes can still irritate, so patch test and stop if you notice redness or stinging.
Is there a brow serum without prostaglandin?
Yes. Several serums on this list, including Shigeru, are made for brows as well as lashes and contain no prostaglandin analog.
Can I switch from a prostaglandin serum to a prostaglandin-free one?
Yes. You can switch at any time. Expect some lashes to shed as they return to their natural cycle, then let the new serum work for at least two months.
Want more lash, brow and skincare tips? Follow us on Instagram at @shigerubeauty for new guides and tips as we publish them.
This article is for general information and compares publicly listed ingredients and prices. Brand names belong to their respective owners. If you have ongoing lash loss, eye irritation or any eye condition, please speak with your doctor or an eye care professional.
The Shigeru Beauty Team