Best Thicker Lashes

Looking for the best ways to achieve thicker, fuller lashes? Discover our top-tested lash serums, from organic oils to peptide-rich formulas, designed to deliver visible results safely and effortlessly.

Thicker, fuller lashes are a dream for many, and finding the right product can make all the difference. Whether you’re looking for natural ingredients, fast results, or gentle formulas, there’s a lash serum out there for you.

We’ve tested and reviewed the best options to help you achieve the lashes you’ve always wanted. From organic castor oil to peptide-powered serums, these products promise to deliver visible results safely and effectively.

List of Top 10 Thicker Lashes

Title	Best For	Price
USDA Organic Castor Oil Lash Serum – Premium All Natural Cold Pressed Castor Oil Eyelash Growth Serum with Mascara Tube – Eyelash Treatment and Conditioner – For Thicker and Fuller Lashes	This lash serum is perfect for anyone who wants grow longer eyelashes and thicker eyebrows the natural way. It’s mess-free, cold pressed, and USDA Certified Organic—ideal for all skin types and those who want safe, lasting results.	View on Amazon (paid link)
The Ordinary Multi-Peptide Lash and Brow Serum, Peptide-Powered Formula for Thicker, Fuller Looking Lashes & Brows, 0.16 Fl Oz	This serum is perfect for anyone who wants thicker, fuller lashes and brows. It’s easy to use and works fast, giving visible results in just four weeks.	View on Amazon (paid link)
Grande Cosmetics GrandeLASH-MD Lash Enhancing Serum – Peptide & Vitamin Infused Formula for Longer, Thicker, Fuller Looking Lashes – Ophthalmologist Tested, Cruelty-Free, 6 Week Supply (1mL)	This product is perfect for anyone wanting longer, thicker lashes without fake extensions. It’s ideal for those seeking a cruelty-free, ophthalmologist-tested formula that works in 6 weeks.	View on Amazon (paid link)
Lash Serum for Eyelash Growth, Premium Lash Enhancing Serum with Advanced Formula Volumizing Longer Fuller and Thicker Looking Lashes, Eyelash Growth for Sensitive Eyes (5 mL)	This lash serum is perfect for anyone wanting longer, fuller lashes without irritation. It’s ideal for sensitive eyes, offering a gentle, hypoallergenic formula that’s safe and effective.	View on Amazon (paid link)
ForChics Eyelash Growth Serum – Prostaglandin-Free Lash Enhancing Serum for Longer, Thicker Lashes and Brows- Natural Formula, Visible Results in 2 Weeks – Vegan, Hormone-Free 0.10 fl. oz / 3ml	ForChics Eyelash Growth Serum is perfect for anyone who wants longer, thicker lashes without harsh chemicals or side effects. It’s ideal for those with sensitive eyes, who want a vegan, hormone-free formula that’s safe for daily use and shows visible results in 2 weeks.	View on Amazon (paid link)
VieBeauti Lash Serum for Eyelash Growth: Eyelash Growth Serum with Advanced Formula to Boost Longer Fuller and Thicker Looking Lashes – Vegan & Cruelty-Free for Sensitive Eyes 3mL	This lash serum is perfect for anyone who wants longer, thicker lashes naturally. It’s safe for sensitive eyes and contact lens wearers, making it ideal for everyone.	View on Amazon (paid link)
Grande Cosmetics GrandeLASH-MD Lash Enhancing Serum – Peptide & Vitamin Infused Formula for Longer, Thicker, Fuller Looking Lashes – Ophthalmologist Tested, Cruelty-Free, 3 Month Supply (2mL)	GrandeLASH-MD Lash Enhancing Serum is perfect for anyone who wants longer, thicker, fuller lashes. It’s great for those who want to improve their lash health with a safe, tested formula.	View on Amazon (paid link)
Babe Lash Enhancing Conditioner – Conditioning Serum for Eyelashes, with Peptides and Biotin, Promotes Fuller & Thicker Looking Lashes, Companion to Essential Lash Serum \| 1mL, Starter Supply	Perfect for anyone wanting hydrated, healthier-looking lashes. This conditioner uses peptides and biotin to boost lash look, with a gentle formula safe for sensitive eyes and lash extensions.	View on Amazon (paid link)
Kate Blanc Cosmetics Castor Oil Organic for Hair, Lashes, Face (2oz), 100% Pure, Cold Pressed, Hexane Free Hair Oil. Lash Serum for Thicker-Looking Eyelashes & Eyebrows	This castor oil is perfect for anyone seeking natural ways to boost lash thickness, nourish hair, or smooth skin. USDA Certified Organic, Cold-Pressed, and Hexane-Free, it supports thicker-looking lashes, healthier hair, and glowing skin with pure, tested quality.	View on Amazon (paid link)
Eyelash Growth Serum with Natural Formula Advanced Lash Enhancing Serum for Longer,Thicker,Fuller Looking Lashes Gentle & Vegan for Eyelash Growth 0.17 Fl Oz (5mL)	This product is perfect for anyone with short, sparse lashes who want a natural, vegan formula to boost growth. It’s ideal for those seeking gentle care and visible results in 4-6 weeks without harsh chemicals.	View on Amazon (paid link)

Detailed Reviews

Discover the top 10 best thicker lash serums tested and trusted by experts. Each product is reviewed for results, safety, and value to match your unique needs. From organic castor oil to peptide-powered formulas, find the perfect fit for longer, fuller lashes. Dive in to pick your ideal match—clear, simple guides await to transform your lash game.

1. USDA Organic Castor Oil Lash Serum – Premium All Natural Cold Pressed Castor Oil Eyelash Growth Serum with Mascara Tube – Eyelash Treatment and Conditioner – For Thicker and Fuller Lashes

USDA Organic Castor Oil Lash Serum - Premium All Natural Cold Pressed Castor Oil Eyelash Growth Serum with Mascara Tube - Eyelash Treatment and Conditioner - For Thicker and Fuller Lashes

Grow thicker lashes and brows with our USDA Organic Castor Oil Lash Serum. It’s all-natural, cold-pressed, and prostaglandin-free, perfect for safe, healthy growth.

Easy to use, mess-free, and convenient. The dual-ended wand ensures precise application, and the mascara tube keeps it clean and hygienic.

Imported from India, our hexane-free oil is gentle on all skin types. One tube lasts 5-6 months, making it a great gift for natural beauty lovers.

Pros	Cons
Promotes longer lashes and fuller brows naturally. Prostaglandin-free formula safe for daily use. Mess-free application with clean, precise wand. USDA Certified Organic for pure, chemical-free care. Lasts 5-6 months with daily use – great gift.	Cold pressed oil may have shorter shelf life. Thick texture might cause application challenges. Results may take longer to show.

Perfect For:

This lash serum is perfect for anyone who wants grow longer eyelashes and thicker eyebrows the natural way. It’s mess-free, cold pressed, and USDA Certified Organic—ideal for all skin types and those who want safe, lasting results.

Ready to Purchase?

View Price on Amazon (paid link)

2. The Ordinary Multi-Peptide Lash and Brow Serum, Peptide-Powered Formula for Thicker, Fuller Looking Lashes & Brows, 0.16 Fl Oz

This serum boosts lash and brow thickness. It uses peptides to help them look fuller and healthier.

Key ingredients like SYMPEPTIDE, Anargy, and Widelash support density. The light, non-greasy formula feels gentle and absorbs fast. Apply twice daily to lash lines and brows.

Results may show in four weeks. Best effects come after 12 weeks of regular use. Patch test before trying to ensure safety.

Pros	Cons
Promotes thicker, fuller lashes and brows for a more defined look. Noticeable results in 4 weeks with consistent use, enhances density over time. Uses powerful peptide blends like Widelash and Capixyl for stronger growth. Lightweight, non-greasy formula ensures easy, twice-daily application.	Requires twice-daily application for best results Patch test required due to potential sensitivity risks Small bottle may require frequent repurchasing

Perfect For:

This serum is perfect for anyone who wants thicker, fuller lashes and brows. It’s easy to use and works fast, giving visible results in just four weeks.

Ready to Purchase?

View Price on Amazon (paid link)

3. Grande Cosmetics GrandeLASH-MD Lash Enhancing Serum – Peptide & Vitamin Infused Formula for Longer, Thicker, Fuller Looking Lashes – Ophthalmologist Tested, Cruelty-Free, 6 Week Supply (1mL)

Grande Cosmetics GrandeLASH-MD Lash Enhancing Serum - Peptide & Vitamin Infused Formula for Longer, Thicker, Fuller Looking Lashes - Ophthalmologist Tested, Cruelty-Free, 6 Week Supply (1mL)

GrandeLASH-MD is a lash-enhancing serum that helps you achieve longer, thicker, and fuller-looking lashes. It uses a peptide and vitamin-infused formula to nourish and strengthen your lashes. With consistent use, you’ll see noticeable results.

This serum is ophthalmologist-tested and cruelty-free, making it a safe and ethical choice. The 6-week supply comes in a compact package, measuring 5 inches in length, 0.5 inches in width, and 5 inches in height. It’s easy to use and fits seamlessly into your beauty routine.

The USA-made serum, with model number GN1004R, delivers long-lasting results. You’ll love the natural, beautiful look it gives your lashes. Try GrandeLASH-MD for healthier, more vibrant lashes.

Pros	Cons
Long-lasting results boost lash growth over time. Compact size fits travel or daily use. Made in the USA ensures quality and safety. Peptide & vitamin formula promotes fuller lashes. Ophthalmologist-tested for gentle, safe application.	Small size, only 1mL, may not last 6 weeks for all users. No immediate results, requires consistent use for visible changes. Pricey for tiny packaging, not budget-friendly for everyone.

Perfect For:

This product is perfect for anyone wanting longer, thicker lashes without fake extensions. It’s ideal for those seeking a cruelty-free, ophthalmologist-tested formula that works in 6 weeks.

Ready to Purchase?

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4. Lash Serum for Eyelash Growth, Premium Lash Enhancing Serum with Advanced Formula Volumizing Longer Fuller and Thicker Looking Lashes, Eyelash Growth for Sensitive Eyes (5 mL)

Lash Serum for Eyelash Growth, Premium Lash Enhancing Serum with Advanced Formula Volumizing Longer Fuller and Thicker Looking Lashes, Eyelash Growth for Sensitive Eyes (5 mL)

This lash serum uses a safe, gentle formula for sensitive eyes. It helps grow thicker, longer lashes naturally.

Strict clinical testing ensures safety. Easy to apply once daily. Contains Myristoyl Pentapeptide-4 for stronger, healthier lashes. 5 mL size for daily use.

Pros	Cons
Safe and gentle formula for sensitive eyes. Promotes thicker, longer lashes naturally. Clinically tested for safety and effectiveness. Easy daily application with precise brush. Contains nourishing ingredients for stronger lashes.	May cause irritation for some sensitive users despite claims. Requires consistent daily use for weeks to see results. Results may vary based on individual biology.

Perfect For:

This lash serum is perfect for anyone wanting longer, fuller lashes without irritation. It’s ideal for sensitive eyes, offering a gentle, hypoallergenic formula that’s safe and effective.

Ready to Purchase?

View Price on Amazon (paid link)

5. ForChics Eyelash Growth Serum – Prostaglandin-Free Lash Enhancing Serum for Longer, Thicker Lashes and Brows- Natural Formula, Visible Results in 2 Weeks – Vegan, Hormone-Free 0.10 fl. oz / 3ml

ForChics Eyelash Growth Serum - Prostaglandin-Free Lash Enhancing Serum for Longer, Thicker Lashes and Brows- Natural Formula, Visible Results in 2 Weeks - Vegan, Hormone-Free 0.10 fl. oz / 3ml

ForChics Eyelash Growth Serum gives longer, thicker lashes in 2 weeks. It’s vegan, hormone-free, and prostaglandin-free, so it’s safe for sensitive eyes.

This serum blends Rosemary, Saw Palmetto, and Polygonum Extracts. It also has peptides, caffeine, and biotin for stronger lashes. The fine-tip applicator makes daily use simple and clean.

Your eyes stay safe with a formula tested by experts. ForChics supports clean beauty and naturally beautiful lashes without harsh risks.

Pros	Cons
See longer, fuller lashes in just 2 weeks with ForChics. Safe, hormone-free formula, no scary side effects. Natural, vegan ingredients nourish and strengthen lashes. Easy to use, one swipe before bed for dream lashes.	Higher price than many alternatives Results may vary between users Small bottle (3ml only)

Perfect For:

ForChics Eyelash Growth Serum is perfect for anyone who wants longer, thicker lashes without harsh chemicals or side effects. It’s ideal for those with sensitive eyes, who want a vegan, hormone-free formula that’s safe for daily use and shows visible results in 2 weeks.

Ready to Purchase?

View Price on Amazon (paid link)

6. VieBeauti Lash Serum for Eyelash Growth: Eyelash Growth Serum with Advanced Formula to Boost Longer Fuller and Thicker Looking Lashes – Vegan & Cruelty-Free for Sensitive Eyes 3mL

VieBeauti Lash Serum for Eyelash Growth: Eyelash Growth Serum with Advanced Formula to Boost Longer Fuller and Thicker Looking Lashes - Vegan & Cruelty-Free for Sensitive Eyes 3mL

VieBeauti Lash Serum uses advanced natural ingredients like cacalia extract, peptides, and amino acids. It helps grow longer, fuller lashes safely for sensitive eyes and contact lens wearers.

This vegan, cruelty-free serum is gentle yet effective. A fine-tip wand makes applying easy—just swipe the lash line morning and night.

Results show in 4 weeks: thicker, longer lashes. It repairs damage from makeup or cleansing. Lashes look healthier, stronger with daily use.

Pros	Cons
Natural ingredients boost longer, fuller lashes Safe for sensitive eyes and contact lens users Visible results in 4 weeks with daily use Repairs damage, strengthens weak lashes gently Easy daily application with precise, mess-free wand	Results may take 4 weeks to appear Potential irritation for sensitive eyes Small 3mL size may require frequent repurchases

Perfect For:

This lash serum is perfect for anyone who wants longer, thicker lashes naturally. It’s safe for sensitive eyes and contact lens wearers, making it ideal for everyone.

Ready to Purchase?

View Price on Amazon (paid link)

7. Grande Cosmetics GrandeLASH-MD Lash Enhancing Serum – Peptide & Vitamin Infused Formula for Longer, Thicker, Fuller Looking Lashes – Ophthalmologist Tested, Cruelty-Free, 3 Month Supply (2mL)

GrandeLASH-MD is a lash serum with peptides, vitamins, and amino acids. It boosts lash look with a formula tested by eye doctors.

This 2mL bottle lasts 3 months. It’s cruelty-free and designed for daily use. Results: longer, thicker, fuller-looking lashes.

Packaging may vary—same great product. Not a tester—full-strength formula. Conditions lashes and brows gently.

Pros	Cons
Clinically tested formula for longer, thicker lashes. Ophthalmologist tested, safe for sensitive eyes. Cruelty-free and peptide-infused for healthy growth. 3-month supply for consistent, fuller-looking lashes.	Expensive compared to similar products. May cause eye irritation despite testing. Slow results require patience.

Perfect For:

GrandeLASH-MD Lash Enhancing Serum is perfect for anyone who wants longer, thicker, fuller lashes. It’s great for those who want to improve their lash health with a safe, tested formula.

Ready to Purchase?

View Price on Amazon (paid link)

8. Babe Lash Enhancing Conditioner – Conditioning Serum for Eyelashes, with Peptides and Biotin, Promotes Fuller & Thicker Looking Lashes, Companion to Essential Lash Serum | 1mL, Starter Supply

Babe Lash Enhancing Conditioner - Conditioning Serum for Eyelashes, with Peptides and Biotin, Promotes Fuller & Thicker Looking Lashes, Companion to Essential Lash Serum | 1mL, Starter Supply

Babe Lash Enhancing Conditioner hydrates and conditions lashes. It uses peptides and biotin for fuller, thicker-looking lashes. Daily use boosts lash health and appearance.

This gentle formula is safe for brows and lash extensions. Apply one brush stroke each morning for best results. Pair with the full Babe Lash Collection for stronger lashes.

Results show in weeks with consistent use. The natural ingredients nourish lashes daily. A simple, easy-to-use serum for healthier-looking lashes.

Pros	Cons
Hydrates and conditions for softer, healthier lashes. Peptides and biotin nourish for thicker, fuller lashes. Gentle formula safe for brows and lash extensions. Daily use shows visible results in lash appearance.	Small 1mL size runs out quickly Requires daily use for best results Results may take weeks to show

Perfect For:

Perfect for anyone wanting hydrated, healthier-looking lashes. This conditioner uses peptides and biotin to boost lash look, with a gentle formula safe for sensitive eyes and lash extensions.

Ready to Purchase?

View Price on Amazon (paid link)

9. Kate Blanc Cosmetics Castor Oil Organic for Hair, Lashes, Face (2oz), 100% Pure, Cold Pressed, Hexane Free Hair Oil. Lash Serum for Thicker-Looking Eyelashes & Eyebrows

Kate Blanc Cosmetics Castor Oil Organic for Hair, Lashes, Face (2oz), 100% Pure, Cold Pressed, Hexane Free Hair Oil. Lash Serum for Thicker-Looking Eyelashes & Eyebrows

Kate Blanc Cosmetics Castor Oil is pure and USDA certified organic. It’s made for hair, lashes, brows, and skin with cold-pressed, hexane-free care.

Use a drop to thicken-looking lashes and brows. Cold-pressed oil helps dry hair feel softer. Regular use may boost a healthier-looking scalp.

Apply daily for smoother skin texture. Fatty acids lock in moisture for supple, glowing skin. Third-party tested and made in the USA for safe, trusted quality.

Pros	Cons
USDA Certified Organic for pure, natural care. Thicker-looking lashes and brows with easy dropper application. Softens dry hair and supports a healthier scalp naturally. Locks in moisture for smoother, radiant skin with fatty acids. Third-party tested for purity and quality you can trust.	Thick texture may feel messy or heavy for some users. Results like thicker lashes/hair may vary between individuals. Oil might leave a greasy residue on skin or hair.

Perfect For:

This castor oil is perfect for anyone seeking natural ways to boost lash thickness, nourish hair, or smooth skin. USDA Certified Organic, Cold-Pressed, and Hexane-Free, it supports thicker-looking lashes, healthier hair, and glowing skin with pure, tested quality.

Ready to Purchase?

View Price on Amazon (paid link)

10. Eyelash Growth Serum with Natural Formula Advanced Lash Enhancing Serum for Longer,Thicker,Fuller Looking Lashes Gentle & Vegan for Eyelash Growth 0.17 Fl Oz (5mL)

Eyelash Growth Serum with Natural Formula Advanced Lash Enhancing Serum for Longer,Thicker,Fuller Looking Lashes Gentle & Vegan for Eyelash Growth 0.17 Fl Oz (5mL)

Tinclen eyelash growth serum helps you grow longer, thicker lashes naturally. Its vegan formula uses plant-based ingredients to nourish lashes and boost growth.
The serum has a slow-release formula with oat extract for steady care. Apply it twice daily with the precision brush for targeted results. Most users see visible improvements in 4-6 weeks.
This gentle serum strengthens lashes from root to tip. Daily use leads to fuller, healthier lashes that enhance your look effortlessly.

Pros	Cons
Promotes longer, thicker, fuller lashes naturally. Natural ingredients nourish and strengthen delicate lashes. Gentle formula safe for sensitive eyes and daily use. Easy application with precise brush for consistent results. Visible improvement in 4-6 weeks with regular use.	Potential for allergic reactions due to natural botanicals like oat extract. Requires twice-daily application to maintain consistent lash growth.

Perfect For:

This product is perfect for anyone with short, sparse lashes who want a natural, vegan formula to boost growth. It’s ideal for those seeking gentle care and visible results in 4-6 weeks without harsh chemicals.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Thicker lashes can boost your confidence. The right serum makes all the difference. Choose one that fits your needs and lifestyle.

Natural Ingredients: Look for serums with organic oils or plant-based extracts. These soothe skin and reduce irritation risks.
Peptide Power: Peptides strengthen lashes for fuller, healthier growth. They work best with consistent, long-term use.
Prostaglandin-Free: Avoid harsh chemicals. Prostaglandin-free formulas are safer for sensitive eyes and prevent unwanted side effects.
Easy Application: A precise brush or wand ensures clean, mess-free use. Daily routines need a tool that’s simple and hygienic.
Visible Results: Check timelines—some show changes in 2 weeks, others take 12 weeks. Pair patience with the right product for lasting effects.
Cruelty-Free & Vegan: Ethical choices matter. Opt for serums that are vegan, cruelty-free, and third-party tested for safety.
Value & Longevity: Compare sizes and prices. A 5mL bottle or a 3-month supply offers better value than smaller, pricier options.

Pick a serum that matches your goals. Whether you want natural oils or peptide science, the perfect formula is out there. Your lashes deserve the best care!