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2021's Top Lash Serums for Long, Thick, Voluminous Lashes

We've compiled a list of the top 5 lash growth serums on the market today.

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At Smarter Reviews, we employ a comprehensive evaluation system to analyze and measure the full value of products, by looking at the ingredients, safety, projected effectiveness, return policies, and overall customer satisfaction. After extensive research, here are our picks for the top lash serums of 2021.

1. Lash24TM AM/PM Formula

Total Ranking

245 votes

9.4/10

A+

Overall Grade

  • Ingredient Safety
    8.2 Avg.

    9.5/10

  • Projected Effectiveness
    8.3 Avg.

    9.4/10

  • Value
    8.2 Avg.

    9.3/10

  • Return Policy
    8.1 Avg.

    9.5/10

  • Customer Satisfaction
    8.2 Avg.

    9.4/10

    Vote and Review

Vote and Review

5/10

PROS

  • AM Primer + PM Lash Serum
  • 8ml of product per tube
  • 2-month supply
  • Naturally derived ingredients
  • Silk amino acids
  • Hydrating fruit sugars
  • Keratin, biotin, & panthenol
  • Red clover extract
  • Prostaglandin-free
  • Paraben-free
  • 90-day return policy

CONS

  • Exclusively sold in the US and Canada
  • Only available online
The Bottom Line

Hair La Vie's Lash24 uses clinically studied, naturally derived ingredients, like biotin, keratin, green tea, and red clover extract —  each with distinct, lash-enhancing benefits. Its formula also includes silk amino acids and hydrating fruit sugars to help lock in moisture.

To top it all off, Lash24 is the first product of its kind to have dual purpose AM primer + PM serum formulas. Each tube contains 8ml of product, which should last around 2 months—this is almost 3x more than the other brands on our list. 

Users of Lash24 reported longer, fuller lashes within as little as 4 weeks. Hair La Vie also offers a 100% satisfaction, 90-day money-back guarantee, which shows us that they stand by their product.

*Results are based on the Smarter Reviews Ranking System and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.

Learn About Our Top Pick 

2. Lunar Lash 

Total Ranking

193 votes

9.1/10

A-

Overall Grade

  • Ingredient Safety
    8.2 Avg.

    8.9/10

  • Projected Effectiveness
    8.3 Avg.

    9.2/10

  • Value
    8.2 Avg.

    9.2/10

  • Return Policy
    8.1 Avg.

    9.1/10

  • Customer Satisfaction
    8.2 Avg.

    8.9/10

    Vote and Review

Vote and Review

5/10

PROS

  • Naturally derived ingredients
  • Red clover extract
  • Keratin
  • Biotin
  • Silk Amino Acids
  • Vitamin B5 (Panthenol)
  • Prostaglandin-free
  • Paraben-free
  • 60-day return policy

CONS

  • 3ml of product per tube
  • Can only be used at night
The Bottom Line

Lunar Lash by Tru Alchemy ranks #2 on our list of top five lash serums. This PM lash serum delivers potent conditioners to both help maintain hydration and support a longer, fuller look.


Lunar Lash is formulated with clean, clinically studied ingredients like red clover extract, keratin, biotin, silk amino acids, and vitamin B5, as well as other powerful ingredients that work together to visibly improve lash length and volume while also helping to nourish the skin along the lash line.


Tru Alchemy’s risk-free return policy includes a 60-day, no-questions-asked guarantee. It may not be needed, however, as the effectiveness of the product earned a top score.*

*Results are based on the Smarter Reviews Ranking System and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.

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3. Gro+ Advanced Lash Serum 

Total Ranking

274 votes

8.7/10

B+

Overall Grade

  • Ingredient Safety
    8.2 Avg.

    8/10

  • Projected Effectiveness
    8.3 Avg.

    8.7/10

  • Value
    8.2 Avg.

    8.4/10

  • Return Policy
    8.1 Avg.

    9/10

  • Customer Satisfaction
    8.2 Avg.

    8.7/10

    Vote and Review

Vote and Review

5/10

PROS

  • Naturally derived ingredients
  • Red clover extract
  • Mung bean extract
  • Prostaglandin-free
  • Paraben-free
  • 90-day return policy

CONS

  • 3ml of product per tube
  • Can only be used at night
  • Lacks keratin and biotin
  • Lacks amino acid complex
The Bottom Line

There's a lot to like about GRO+ Advanced Lash Serum by Vegamour. Like most contenders on our list, this serum is made with naturally derived ingredients, and is 100% vegan and cruelty-free

In addition to red clover extract, Vegamour's formula also includes clinically studied mung bean and hemp-derived cannabidiol, which has been shown to help reduce inflammation and help improve blood circulation.

Unfortunately, it lacks essential nutrients like keratin, biotin, and an amino acid complex. Their tube only contains 3ml of product and can only be used at night.

On the plus side, people who used this product left highly favorable reviews, and many people found it to be an effective lash serum. Additionally, Vegamour offers a solid 90-day money-back guarantee

*Results are based on the Smarter Reviews Ranking System and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.

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4. GrandeLASH-MD


Total Ranking

167 votes

7.9/10

B-

Overall Grade

  • Ingredient Safety
    8.2 Avg.

    7.8/10

  • Projected Effectiveness
    8.3 Avg.

    8.4/10

  • Value
    8.2 Avg.

    8.1/10

  • Return Policy
    8.1 Avg.

    9/10

  • Customer Satisfaction
    8.2 Avg.

    8/10

    Vote and Review

Vote and Review

5/10

PROS

  • Panthenol
  • Amino acid complex
  • Hydrating fruit sugars
  • Paraben-free
  • 90-day return policy

CONS

  • 4ml of product
  • Can only be used at night
  • Lacks keratin and biotin
  • Lacks red clover extract
  • Contains synthetic prostaglandin
The Bottom Line

GrandeLASH-MD's award-winning lash serum is infused with a potent blend of ingredients to help promote the appearance of naturally longer, thicker-looking lashes. Its formula includes panthenol, amino acids, and hydrating fruit sugars

However, it's also missing a lot of key ingredients: biotin, keratin, and red clover extract. And unfortunately, GrandeLASH-MD's formula contains a prostaglandin analog, which may be responsible for some users reporting discoloration around their eyes after use. 

Their formula comes in 2 different sizes, the larger containing 4ml of product, which still falls short of our top pick. Plus, it's only a night time serum. Grande Cosmetics offers a 90-day return policy if you're not 100% satisfied with their product. 

*Results are based on the Smarter Reviews Ranking System and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.

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5. Lash Boost


Total Ranking

219 votes

7.5/10

C

Overall Grade

  • Ingredient Safety
    8.2 Avg.

    7.5/10

  • Projected Effectiveness
    8.3 Avg.

    8.4/10

  • Value
    8.2 Avg.

    7.5/10

  • Return Policy
    8.1 Avg.

    8/10

  • Customer Satisfaction
    8.2 Avg.

    8.1/10

    Vote and Review

Vote and Review

5/10


PROS

  • Keratin and biotin
  • Panthenol
  • Hydrating fruit sugars
  • 5ml of product
  • Paraben-free 

CONS

  • Can only be used at night
  • Lacks several key ingredients
  • Contains synthetic prostaglandin 
  • High price point
The Bottom Line

Rounding out our list is Rodan + Fields Lash Boost. Their formula includes favorites like panthenol, keratin and biotin, however it's missing a lot of other important ingredients like red clover extract, silk amino acids, and hydrating fruit sugars. 

More importantly, Rodan + Fields recently came under fire for "deceptive labeling" and a lawsuit was filed on behalf of consumers, alleging a "failure to disclose the harmful side effects" of a synthetic prostaglandin found in their formula. 

Additionally, Rodan + Fields Lash Boost costs 2-3 times as much as the average eyelash serum. On the upside, it does contain 5ml of product per tube, and if you're not satisfied with this product, Rodan + Fields offers a 60-day money-back guarantee

*Results are based on the Smarter Reviews Ranking System and do not necessarily reflect typical results from the use of these products. Please visit product websites for more information.

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