20 Best Farm2derm Biotin Lash Serum [2024]

Are you looking for the best Farm2derm Biotin Lash Serum? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling Farm2derm Biotin Lash Serum.

We Recommended:

# Preview Product
1 Grande Cosmetics GrandeLASH-MD Lash Enhancing Serum, 1 ml - 6-week starter supply Grande Cosmetics GrandeLASH-MD Lash Enhancing Serum, 1 ml - 6-week starter supply
2 Premium Eyelash Growth Serum by VieBeauti, Lash boost Serum for Longer, Fuller Thicker Lashes (3ML),... Premium Eyelash Growth Serum by VieBeauti, Lash boost Serum for Longer, Fuller Thicker Lashes...
3 Biotin Hair Growth Serum - Biotin serum & Hair growth oil and hair serum - Topical hair growth... Biotin Hair Growth Serum - Biotin serum & Hair growth oil and hair serum - Topical hair growth...
4 Natural Eyelash Growth Serum and Brow Enhancer to Grow Thicker, Longer Lashes for Long, Luscious... Natural Eyelash Growth Serum and Brow Enhancer to Grow Thicker, Longer Lashes for Long, Luscious...
5 BABYPEACH Eyelash Growth Serum, Natural Eyebrow Enhancer with Biotin for Longer, Thicker, Lustrous... BABYPEACH Eyelash Growth Serum, Natural Eyebrow Enhancer with Biotin for Longer, Thicker,...
6 L'Oreal Paris Makeup Voluminous Lash Boosting Conditioning Primer Mascara, White Primer, 0.24 fl;... L'Oreal Paris Makeup Voluminous Lash Boosting Conditioning Primer Mascara, White Primer, 0.24 fl;...
7 essence | Lash Princess False Lash Effect Mascara | Gluten & Cruelty Free essence | Lash Princess False Lash Effect Mascara | Gluten & Cruelty Free
8 Neutrogena Healthy Lashes Lash Enhancer Serum Formulated with Biotin & Peptides; Nourishing &... Neutrogena Healthy Lashes Lash Enhancer Serum Formulated with Biotin & Peptides; Nourishing &...
9 Honest Beauty Extreme Length Mascara + Lash Primer | 2-in-1 Boosts Lash Length, Volume & Definition... Honest Beauty Extreme Length Mascara + Lash Primer | 2-in-1 Boosts Lash Length, Volume &...
10 Nature's Bounty Biotin, Supports Healthy Hair, Skin and Nails, 10000 mcg, Rapid Release Softgels,... Nature's Bounty Biotin, Supports Healthy Hair, Skin and Nails, 10000 mcg, Rapid Release Softgels,...
11 Castor Oil (2oz), USDA Certified Organic, 100% Pure, Cold Pressed, Hexane Free by Kate Blanc... Castor Oil (2oz), USDA Certified Organic, 100% Pure, Cold Pressed, Hexane Free by Kate Blanc...
12 Organic Castor Oil for Eyelashes and Eyebrows with Applicator Kit, Brow and Eyelash Growth Serum by... Organic Castor Oil for Eyelashes and Eyebrows with Applicator Kit, Brow and Eyelash Growth Serum...
13 COVERGIRL Lash Blast Lash & Brow Transparent Serum, TRANSLUCENT, 0.44 Fl Oz COVERGIRL Lash Blast Lash & Brow Transparent Serum, TRANSLUCENT, 0.44 Fl Oz
14 Renpure Originals Biotin & Collagen Thickening Conditioner, 32 Fl Oz (Pack of 1) Renpure Originals Biotin & Collagen Thickening Conditioner, 32 Fl Oz (Pack of 1)
15 SCULPT 3X Biotin Lash Enhance Serum 7 ml SCULPT 3X Biotin Lash Enhance Serum 7 ml
16 PURA D'OR Organic Castor Oil (4oz + 2 BONUS Pre-Filled Eyelash & Eyebrow Brushes) 100% Pure, Cold... PURA D'OR Organic Castor Oil (4oz + 2 BONUS Pre-Filled Eyelash & Eyebrow Brushes) 100% Pure, Cold...
17 Biotin 10000mcg | 250 Fast Dissolve Tablets | Max Strength | Vegetarian, Non-GMO, Gluten Free... Biotin 10000mcg | 250 Fast Dissolve Tablets | Max Strength | Vegetarian, Non-GMO, Gluten Free...
18 Eyelash Growth Serum, 5ML Lash serum, Advanced Eyelash Serum, Irritation Free Lash Serum for Eyelash... Eyelash Growth Serum, 5ML Lash serum, Advanced Eyelash Serum, Irritation Free Lash Serum for...
19 Eyelash Growth Serum & Eyebrow Enhancer - Biotin, Vitamin E & Collagen - Rapid Growth Serum for... Eyelash Growth Serum & Eyebrow Enhancer - Biotin, Vitamin E & Collagen - Rapid Growth Serum for...
20 Hairgenics Pronexa Hair Loss Therapy Conditioner – Hair Growth & Regrowth Conditioner With Biotin,... Hairgenics Pronexa Hair Loss Therapy Conditioner – Hair Growth & Regrowth Conditioner With...
Bestseller No. 1
Grande Cosmetics GrandeLASH-MD Lash Enhancing Serum, 1 ml - 6-week starter supply
  • It is long lasting results
  • Package Dimensions 5 inch L x 0.5 inch W x 5 inch H
  • Item model number GN1004R
  • Country of Orgin USA
SaleBestseller No. 2
Premium Eyelash Growth Serum by VieBeauti, Lash boost Serum for Longer, Fuller Thicker Lashes (3ML),...
  • LENGTHEN AND STRENGTHEN your eyelashes to achieve alluring eyes naturally. Our nourishing eyelash growth serum promotes new eyelash growth and...
  • POWERFUL AMINO ACIDS in L-Isoleucine support new growth by stimulating circulation to blood vessels around follicles. This fills-in patchy lash lines...
  • RICH IN NUTRIENTS to boost growth and volume, VieBeauti Eyelash Serum works wonders on the littlest of lashes. As an added bonus, arginine helps...
  • GENTLE FORMULATION is safe to use on the delicate tissues along the lash line. Botanically derived ingredients infuse sheen and luster without...
  • EASY TO APPLY with its own fine-tip wand, VieBeauti Eyelash Growth Serum goes on in the same way as your favorite eyeliner. Moving from the inner...
SaleBestseller No. 3
Biotin Hair Growth Serum - Biotin serum & Hair growth oil and hair serum - Topical hair growth...
  • Hair growth for men & women - The Biotin hair growth serum women love and men rely on. Pureauty's Biotin hair serum is ideal for supplementing hair...
  • The Biotin Hair Care Authority - Pair our Biotin serum with our Biotin Shampoo and Conditioner for maximum hair support. Add this to your daily...
  • Premium Biotin Product - Our Biotin for hair formula is Non-Greasy, and made with premium ingredients. The secret lies in the formula of Biotin, D...
  • Biotin Hair Growth - Give your hair the appearance of thicker hair with our Biotin hair serum. The Biotin oil alternative, our hair thickening serum...
  • Non-greasy, A little goes a long way - We stand by our high quality standards. Our non-greasy Biotin hair serum is made in the USA and is never tested...
SaleBestseller No. 4
Natural Eyelash Growth Serum and Brow Enhancer to Grow Thicker, Longer Lashes for Long, Luscious...
  • GET LONGER & THICKER EYELASHES: Terez & Honor Eyelash Growth Enhancer and Brow Serum gives extra volume even to your eyelash, grow eyelashes faster....
  • GENTLE and SAFE for ALL SKIN TYPES: Terez & Honor lash growth serum is proven by science and natural, experience drastic increases in length and...
  • STRONGER and HEALTHIER HAIR: Terez & Honor lash growth serum is made with only the highest quality ingredients. Everything in our serum is...
  • EASY to APPLY: Simply place a thin line along the base of your upper and lower lash line once a day at nighttime. Apply only at the root area of...
  • NOURISHING & NATURAL INGREDIENTS: Eyelash Growth Serum and Brow Enhancer is made from natural & highest quality ingredients.
Bestseller No. 5
BABYPEACH Eyelash Growth Serum, Natural Eyebrow Enhancer with Biotin for Longer, Thicker, Lustrous...
  • 【Super Effective】BABYPEACH botanical enhancing serum can be used on both eyelash and eyebrows. With the advanced natural formula to provide you an...
  • 【Rich in Biotin】The powerful biotin can help convert certain nutrients into energy and make your eyelash and brow longer, thicker, stronger and...
  • 【Nourishing & Natural Ingredients】Made with the highest quality ingredients including Retinol, Methionine, Hyaluronic Acid, Vitamin E and...
  • 【Visible Results in 4 week】Simply apply a thin layer of the serum from the inner corner of your eye to the outer corner or your eyebrow and you...
  • 【Why BABYPEACH】Developed and produced by BABYPEACH, a company passionate in beauty & personal care products. If you are not happy with this...
SaleBestseller No. 6
L'Oreal Paris Makeup Voluminous Lash Boosting Conditioning Primer Mascara, White Primer, 0.24 fl;...
  • Voluminous Lash Primer, the perfect partner to your favorite mascara to instantly boost every lash look; Lightweight eyelash primer instantly builds...
  • L'Oreal Paris Mascara: Get the long, full eyelashes you love with our best mascaras and primers; Choose from our innovative volumizing formulas and...
  • Create you perfect eye makeup look with our collection of Voluminous mascaras, achieve sleek lines with smudge proof eyeliner, define your brows and...
  • Because You're Worth It: L'Oreal Paris Makeup helps you create the look you want with our full line of makeup including foundations, concealers,...
  • Perfect To Pair With: Voluminous Original Volume Building Mascara, uniquely formulated to resist clumping, soften and build lashes up to 5X their...
Bestseller No. 7
essence | Lash Princess False Lash Effect Mascara | Gluten & Cruelty Free
  • If you receive this mascara UNWRAPPED, it did not come from essence cosmetics.
  • NO FALSIES NEEDED! Lash Princess False Lash Mascara defines and separates lashes while achieving a bold look.
  • DRAMATIC VOLUME: the conic shape fiber brush delivers dramatic volume and sculpted length WITHOUT clumps or globs.
  • LASTS ALL DAY: go about your day free from flaking & fading! This mascara does not flake, fade, or wear, making it a perfect all-day, longlasting...
  • CRUELTY FREE: essence cosmetics is certified and acknowledged by PETA as a cruelty-free brand. We do not test any of our products on animals.
SaleBestseller No. 8
Neutrogena Healthy Lashes Lash Enhancer Serum Formulated with Biotin & Peptides; Nourishing &...
  • 0.08-ounces of Neutrogena Lash Enhancer Serum with biotin and peptides to boost and enhance the natural look of lashes
  • Full lash serum helps nourish and condition from the root to promote healthier, fuller, and more beautiful-looking lashes
  • Formulated with biotin and peptides, this lash booster leaves lashes feeling moisturized and longer-looking in just 4 weeks with 9 out of 10 women...
  • This gentle lash boosting serum is safe to use around eyes and has a fine-tip brush applicator to make application quick and easy
  • To get fuller and healthier looking lashes, apply conditioning serum nightly at the base of the lash line and along lashes to the tip
Bestseller No. 9
Honest Beauty Extreme Length Mascara + Lash Primer | 2-in-1 Boosts Lash Length, Volume & Definition...
  • New look, same great formula; packaging may vary
  • Award-winning, bestselling double-sided mascara plus lash primer for ultimate length and volume
  • Ophthalmologist Tested
  • Cruelty free
  • EWG Certified
SaleBestseller No. 10
Nature's Bounty Biotin, Supports Healthy Hair, Skin and Nails, 10000 mcg, Rapid Release Softgels,...
  • SUPPORTS HEALTHY HAIR (1): As is a commonly used vitamin for healthy hair Biotin helps support and maintain healthy beautiful hair (1)
  • SKIN & NAIL HEALTH SUPPORT (1): Biotin plays an important role in the health of your skin and also supports healthy nails so you can continue to look...
  • NERVOUS SYSTEM SUPPORT (1): As part of the B Family of vitamins Biotin helps support a healthy nervous system and has other benefits as well (1)
  • ENERGY METABOLISM: Your body uses B-Vitamins, like Biotin to help convert foods into cellular energy; (1) Nature’s Bounty Biotin vitamins may play...
  • FROM THE TRUSTED WELLNESS EXPERTS: Nature’s Bounty Biotin Softgels are a product of nearly 50 years of dedication to quality consistency and...
SaleBestseller No. 11
Castor Oil (2oz), USDA Certified Organic, 100% Pure, Cold Pressed, Hexane Free by Kate Blanc...
  • USDA CERTIFIED ORGANIC CASTOR OIL - Kate Blanc’s Organic Cold Pressed Castor Oil is certified by USDA and is guaranteed to be authentic, pure,...
  • GROW LUSH LONG EYELASHES AND BOLD EYEBROWS - The eyelash and eyebrow kit allow simple application to eye lashes and brow lines to promote eyelash...
  • STIMULATE HAIR GROWTH - Grow longer and thicker hair in a quick, natural way, while also diminishing hair loss. Pure castor oil is a natural hair...
  • SMOOTHER SKIN - Keep your face moisturized and reduce blemishes, acne, pimples, scars, and fine lines without leaving your skin dry. Pure castor oil...
  • ONE YEAR WARRANTY - We aim to offer the highest quality and most authentic products. We guarantee your satisfaction. If you are not satisfied with...
SaleBestseller No. 12
Organic Castor Oil for Eyelashes and Eyebrows with Applicator Kit, Brow and Eyelash Growth Serum by...
  • Contains (1) 1 oz. bottle organic castor oil, (1) glass dropper, (5) wands, (5) brushes
  • Easily apply Castor Oil to thin or thinning hair to encourage eyebrow and eyelash growth and nourish follicles
  • Naturally rich in Vitamin E, Organic Castor Oil promotes health of brows and lashes
  • Pure Body Naturals fosters sustainable partnerships with artisan distillers to provide tested, safe essential oils
  • Vegan, organic and gluten-free; cruelty-free; never contains parabens, phthalates or unnatural scents, petrolatum or SL
SaleBestseller No. 13
COVERGIRL Lash Blast Lash & Brow Transparent Serum, TRANSLUCENT, 0.44 Fl Oz
  • LONGER LASHES: Clinically proven; lashes appear up to 24% longer in just 30 days
  • LONGER LASHES: Clinically proven; lashes appear up to 24% longer in just 30 days
  • PREVENT BREAKAGE: Serum helps lashes and brows appear thicker, fuller, and stronger after 30 days
  • FORMULATED WITHOUT: Parabens, sulfates, phthalates, mineral oil, fragrances, or dyes
  • VEGAN: Eyelash volume serum is infused with bamboo extract, biotin, peptides, and castor oil
SaleBestseller No. 14
Renpure Originals Biotin & Collagen Thickening Conditioner, 32 Fl Oz (Pack of 1)
  • Thickening Conditioner: Biotin and Collagen work together to increase strength and thickness for beautiful shine and body in this conditioner that...
  • Superior Shine: Our conditioners are plant-based for healthier hair from root to tip with superior shine, moisture and color retention with no...
  • The Renpure Collection: Try our full collection of responsibly sourced and ethically produced products for gentle cleansing from head to toe, from...
  • Gentle and Nourishing: We use gentle, plant-based cleansers with carefully chosen ingredients like tea tree oil, argan oil, shea butter and coconut to...
  • Plant Based Beauty: We’ve been making plant-based beauty products since day one. Our hair and body care products are free from sulfates, parabens,...
Bestseller No. 15
SCULPT 3X Biotin Lash Enhance Serum 7 ml
  • For Fuller, Longer Looking Lashes
  • Nourishes And Conditions For Dramatic Lashes
  • Biotin supports healthy lash growth
  • Hyaluronic acid nourishes and conditions
  • Pro B5 supports lash length and fullness
Bestseller No. 16
PURA D'OR Organic Castor Oil (4oz + 2 BONUS Pre-Filled Eyelash & Eyebrow Brushes) 100% Pure, Cold...
  • Use by date: This product’s use by date is determined by the Period After Opening symbol. The Period After Opening symbol is marked by a box with a...
  • FOR FULLER AND LUSCIOUS EYE-POPPING EYELASHES; Conceal thin, uneven lashes and brows with this amazing Castor Oil for thicker looking lashes and brows
  • ACHIEVE THICKER AND DARKER ARCHES FOR YOUR EYEBROWS; When It Comes To Eyebrows The Bigger The Better; Drop Those Tweezers And Naturally Achieve Fuller...
  • FRESHEN UP ANYWHERE AT ANYTIME; Our Cold Pressed Castor Oil Includes 2 Bonus On-The-Go Brush Mascara Wand And Bottles For Easy Application On Brows...
  • RICH CASTOR OIL WITH SOOTHING SCENT. Pura Dor's Castor Oil for eyebrows growth is Made With High Quality Organic Ingredient That Is Cold Pressed To...
SaleBestseller No. 17
Biotin 10000mcg | 250 Fast Dissolve Tablets | Max Strength | Vegetarian, Non-GMO, Gluten Free...
  • MAXIMUM BIOTIN: Support a strong beauty regimen daily with this Extra Strength Essential B Vitamin!
  • FAST DISSOLVE: Convenient tablets provide 10,000 mcg of Biotin with a natural berry flavor
  • EXPERTLY CRAFTED: Our vegetarian formula is backed by our commitment to purity and potency
  • CARLYLE MANUFACTURERS: Laboratory Tested, Trusted Ingredients, Superior Quality, 100% Guaranteed!
  • NATURALLY FREE OF: Gluten, Yeast, Milk, Lactose, Artificial Flavor, Preservatives and Non-GMO
Bestseller No. 18
Eyelash Growth Serum, 5ML Lash serum, Advanced Eyelash Serum, Irritation Free Lash Serum for Eyelash...
  • LONGER AND STRONGER: Our nourishing development lash growth serum encourages the growth of new eyelashes and strengthens existing hairs for bold,...
  • STRONG AMINO ACIDS: Lash serum has L-Isoleucine's Amino Acids promote blood vessel circulation surrounding follicles, supporting new growth. Patchy...
  • VERY NUTRIENT-RICH: Eyelash Serum works wonders on even the shortest lashes because lash serum for eyelash growth is rich in nutrients to promote...
  • GENTLEST FORMULA: The delicate tissues along your lash line are safe to utilize with a gentle formula. Eyelash growth serum ingredients from plants...
  • SIMPLE TO APPLY: Eyelash Growth Serum is as simple to apply as your go-to eyeliner and comes with a fine-tip brush. Brush on a thin coating at the...
Bestseller No. 19
Eyelash Growth Serum & Eyebrow Enhancer - Biotin, Vitamin E & Collagen - Rapid Growth Serum for...
  • Eyelash Serum To Grow Lashes - Formulated with Vitamins and clinical complexes to nourish your lashes and brows for rapid growth. Our formula...
  • Proven Ingredients - Our lash growth and eyebrow growth serum for women combines Biotin, Collagen, Panthenol and other hair growth ingredients that...
  • Lash Serum - This DHT blocking ingredient l-arginine prevents hair loss and fortifies and rejuvenates follicles. Our brow and lash boost serum is a...
  • Eyelash Conditioner - Rich with antioxidant Vitamin E and squalene work as a deep conditioner around the eye area, while antioxidant properties of...
  • Premium Ingredients- We use the best, specifically selected ingredients in our premium eyelash serum to grow lashes and brows. Our lash primer and...
Bestseller No. 20
Hairgenics Pronexa Hair Loss Therapy Conditioner – Hair Growth & Regrowth Conditioner With Biotin,...
  • USDA Biobased Certified Product, Certified Organic Ingredients and Sulfate Free! The amazing hair healing and regrowth ingredients include: Biotin,...
  • Contains clinically researched levels of Biotin for maximum hair growth and health. Biotin not only promotes healthy hair growth but also prevents...
  • Scientific research on hair loss has shown that the number one factor in hair loss is the production of dihydrotestosterone or DHT. Pronexa...
  • Pronexa Hair Loss Conditioner has been specially formulated to address the key conditions that contribute to hair loss and thinning hair as well as...
  • Hairgenics products are NEVER tested on animals and always cruelty-free. Only the best, and highest purity ingredients go into our products! 100%...

Having trouble finding a great Farm2derm Biotin Lash Serum?

This problem is well understood by us because we have gone through the entire Farm2derm Biotin Lash Serum research process ourselves, which is why we have put together a comprehensive list of the best Farm2derm Biotin Lash Serums available in the market today.

After hours of searching and using all the models on the market, we have found the best Farm2derm Biotin Lash Serum for 2023. See our ranking below!

How Do You Buy The Best Farm2derm Biotin Lash Serum?

Do you get stressed out thinking about shopping for a great Farm2derm Biotin Lash Serum? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching Farm2derm Biotin Lash Serum, which is why we have assembled a comprehensive list of the greatest Farm2derm Biotin Lash Serum available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for Farm2derm Biotin Lash Serum that you consider buying. Your questions might include the following:

  • Is it worth buying an Farm2derm Biotin Lash Serum?
  • What benefits are there with buying an Farm2derm Biotin Lash Serum?
  • What factors deserve consideration when shopping for an effective Farm2derm Biotin Lash Serum?
  • Why is it crucial to invest in any Farm2derm Biotin Lash Serum, much less the best one?
  • Which Farm2derm Biotin Lash Serum are good in the current market?
  • Where can you find information like this about Farm2derm Biotin Lash Serum?

We’re convinced that you likely have far more questions than just these regarding Farm2derm Biotin Lash Serum, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for Farm2derm Biotin Lash Serum, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible Farm2derm Biotin Lash Serum. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an Farm2derm Biotin Lash Serum buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available Farm2derm Biotin Lash Serum currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of Farm2derm Biotin Lash Serum has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an Farm2derm Biotin Lash Serum?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your Farm2derm Biotin Lash Serum.
  5. Customer Ratings: Number ratings grade Farm2derm Biotin Lash Serum objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Farm2derm Biotin Lash Serum.
  7. Product Quality: You don’t always get what you pay for with an Farm2derm Biotin Lash Serum, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an Farm2derm Biotin Lash Serum is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining Farm2derm Biotin Lash Serum information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding Farm2derm Biotin Lash Serum is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

Related Post:

FAQ:

Q: Does biotin make your eyelashes grow longer?

A: “Biotin is a B vitamin and helps lashes grow longer and thicker and stimulates the growth of additional eyelash follicles,” she explains. “Lipids condition and moisturize the lashes, and peptides specifically act on the skin cells of lashes to create a healthier foundation and boost volume.”

Q: What is the best serum for eyelash growth?

A: Rapidlash Eyelash Enhancing Serum “RapidLash also works,” says Dr. Patel. “Polypeptides, biotin, panthenol, amino acids, soybean oil, and pumpkin seed extracts act as conditioners to the lashes. It has prostaglandin derivatives to help lengthen the lashes.”

Q: Which prostaglandin formula is best for Lashes?

A: “My favorite, the one I use, is Grandelash MD,” says Dr. Patel of the formula that contains prostaglandin derivatives. “Prostaglandin analogues work by lengthening lashes by prolonging the anagen phase (active growth phase) of the hair follicles,” she shares.

Q: What are the benefits of Lash serums?

A: The conditioning treatments in lash serums contain ingredients like peptides to promote healthy hair follicles, vitamins like biotin to strengthen lashes, and amino acids, plant extracts, and oils (such as pumpkin seed extract and castor oil) that may prevent existing lash hair from falling out.