Light Heart Lash Serum | Prostaglandin Analog-Free Lash and Brow Serum

Patented peptides for longer, denser lashes — with none of the prostaglandin side effects.

Prostaglandin-free
Extension-safe
6-week supply

One-time purchase $50.00

60-day money-back guarantee
Free shipping over $75
Free gift on your first order
Skip or cancel anytime

Complete the ritual

$79.20~~$88.00~~ Save 10%

Gentle Foaming Lash Cleanser

$17.10 ~~$19.00~~

View product

Light Heart Lash Serum | Prostaglandin Analog-Free Lash and Brow SerumThis item

$45.00 ~~$50.00~~

View product

Peptide Eye Masks

$17.10 ~~$19.00~~

View product

Don't just take our word for it...

Hear what Nan has to say about her experience using the Light Heart Lash & Brow Serum

Real Results

Lash & Brow Transformations

Real transformations across multiple timelines

Light Heart lash and brow serum before and after, four weeks of nightly use

4 weeks

Lash serum before and after at two weeks of use

2 weeks

2.5 weeks

Natural lashes under extensions after four weeks of serum use and proper cleansing

4 weeks

Close-up before-and-after lash serum comparison of a human eye showing eyelash growth progress, labeled 'day 1' at the top and 'day 14' at the bottom.

14 days

Light Heart brow serum before and after over three months of use

90 days

Light Heart lash serum used alongside lash extensions, four week before and after

4 weeks

Close-up before-and-after comparison of eyelashes, with the top panel showing sparse, weak lashes and the bottom panel showing fuller, darker, and healthier lashes. A watermark reads '@lashedbykenzie98 6 week serumuse'.

6 weeks

Light Heart lash serum before and after on natural lashes

60 days

Light Heart lash serum before and after, eight weeks of nightly use
Close-up before-and-after comparison of a person's eye showing the effect of a serum on eyelashes. The top image shows shorter, sparser lashes, while the bottom image shows significantly longer, darker, and more defined lashes.

8 weeks

0%: Prostaglandins. Not now, not ever.
2–4: Weeks to first visible change.
5/5: Average rating across 13 reviews.
60: Day money-back guarantee.

What's inside.

Every ingredient is scientifically formulated to enhance your natural beauty.

Patented peptide complex: Conditions the follicle so lashes stay in their growth phase longer instead of shedding early.
Panthenol: Pro-vitamin B5. Softens and flexes the lash so it bends instead of snapping.
Biotin: Supports the keratin structure of each new hair as it grows in.
Hyaluronic acid: Holds moisture at the lash line, which is where dryness causes breakage.

Never: harsh chemicals, sulfates, added fragrance.

Questions, answered.

Is the Light Heart Serum safe during pregnancy and breastfeeding?

The Light Heart Serum is commonly used by during pregnant and breastfeeding mothers. Our formula is 100% prostaglandin free and relies on a gentle, clinically studied peptide blend, making it one of the safest lash and brow serums available. Our founder used the serum throughout her entire pregnancy and grew her eyelashes back from nothing.

How much product is in the bottle, and how long does it last?

Each bottle contains 3ml of serum. With twice-daily use it lasts approximately 1 month up to 2 months with once-daily application. We recommend using within 12 months of opening.

When will I see results from a lash serum?

Many people notice results in the first 2 weeks of consistent use. Most customers notice fuller, longer lashes and brows within 4–6 weeks of consistent use. For best results, apply once or twice daily to clean, dry lashes and brows and use continuously.

Can I use a lash serum with lash extensions?

Yes — the Light Heart Serum is completely safe to use alongside lash extensions. Apply a thin layer to the root of your natural lashes using the doe foot applicator. Avoid contact with extension bonds or adhesive.

Is the Light Heart Serum safe for sensitive eyes?

Yes. Our formula is prostaglandin analog free and designed specifically for sensitive eyes, including contact lens wearers. As with all eye-area products, avoid direct contact with the eyes themselves.

Does the Light Heart Growth Serum contain prostaglandins?

No — it is 100% prostaglandin and prostaglandin analog free. Instead of prostaglandins, we use a patented peptide blend (Biotinoyl Tripeptide-1 and Acetyl Tetrapeptide-3) clinically shown to stimulate lash and brow growth without the side effects associated with prostaglandin serums, such as iris pigmentation or eyelid darkening.

Can lash serum be used on eyebrows?

Yes — the Light Heart Serum works on both lashes and brows. Apply along the brow line with the doe foot applicator morning and/or evening for fuller, denser brows. Most customers see visible brow improvement within 4–6 weeks.

Can I use lash serum after a lash lift?

Yes — the Light Heart Growth Serum is safe to use after a lash lift. We recommend waiting 24–48 hours after your service before applying. Using the serum regularly after a lash lift helps maintain and strengthen your natural lashes between appointments.

How often should I use lash growth serum?

Apply once daily for steady results, or twice daily — morning and night — for more intensive growth. Consistency is key: most customers see noticeable results within 4–6 weeks of daily use.

Where is the Light Heart Growth Serum made?

The Light Heart Growth Serum is manufactured in the UK to the highest cosmetic standards and is internationally compliant for personal use and retail worldwide.

Why does the Growth Serum use a doe foot applicator instead of a brush?

Our soft doe foot applicator holds significantly more product than a standard fine-tip serum brush, delivering more serum to the lash and brow line with every application. The result is better coverage, more consistent results, and less product waste.

Is the Light Heart Growth Serum suitable for all skin types?

Yes, our sensitive formula is suitable for all skin types including dry, oily, combination, and reactive skin. It is free from prostaglandin analogues and formulated to minimise irritation.

Does lash serum expire?

Yes, we recommend using the Light Heart Growth Serum within 12 months of opening. Store in a cool, dry place away from direct sunlight to maintain the efficacy of the active peptide ingredients.