An elegant product shot of the Tsu Sei Eyelash Serum box, opened to reveal the bottle nestled inside. The image highlights th

NATURAL Lashes
Eyelash & Brow Serum

Real Growth. Unreal Results.

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Don't compromise. Get our exclusive 6ml bottle for the price of 3ml and leave the competition's 3ml behind. More serum, bette

Grow Longer, Stronger, Bolder Lashes - Naturally.

TSU:SEI Natural Lashes is a clean, prostaglandin-free,

premium lash serum with an XL 6 ml pack - twice the typical 3ml category size.

Powered by four ingredient groups - Biotin Boost Complex, Active Hydration, Botanical Nutrition, and Conditioning Actives - it delivers longer, stronger, healthier lashes.

No prostaglandin analogues.

No chemicals.

Just clean, plant-powered results you can trust.

BEFORE & AFTER

A high-resolution product shot of the Tsu Sei eyelash serum box, highlighting the luxurious and sleek design. The box is pred

Before and After: Real results with Tsu Sei Eyelash Serum. See the difference and get inspired by these stunning lash growth

tsu sei natural lashes eyelash serum before and after 4 weeks initial results stronger conditioned lashes

CLINICALLY TESTED AND SAFE FOR CONTACT LENS WEARERS | 100% VEGAN & CRUELTY FREE | MONEY BACK GUARANTEE | 5+ MONTH SUPPLY |

Discover Tsu Sei Eyelash Growth Serum, the ultimate solution for longer, thicker, and fuller lashes. This powerful lash serum

What’s the Secret to Our Results?

No Secrets at All.

TSU:SEI Natural Lashes Serum isn’t just another lash product - it’s a smarter choice.

Firstly, we give you 6 ml for £29.99, while top competitors only offer 3 ml at the same price. That means double the value and a serum that lasts up to 6 months.

Secondly, our formula is powered by four clean ingredient groups, led by the Biotin Boost Complex, delivering longer, stronger, healthier lashes - naturally.

Double the serum, double the results

EVERY INGREDIENT HAS A PURPOSE.

100% active. 0% filler.

Our eyelash serum is formulated with transparency.

We break it down into four purposeful groups so you understand exactly what you’re putting on your lashes.

Each group plays a vital role in delivering real, visible results.

An image showcasing the four powerful ingredient groups in Tsu Sei eyelash serum that promote lash growth and strength. The v

Active Hydration System

Provides lightweight hydration, delivers actives into follicles, and maintains lash moisture balance.

BiotinBoost Complex

Biotin + peptides fuel keratin, anchor lashes, and support real growth.

Botanical Nutrition

Stimulates circulation, boosts oxygen and nutrients to follicles, and supports lash vitality.

Conditioning Actives

Strengthens lash fibres, conditions against breakage, and protects from environmental stress.

Aqua (Water) | Hyaluronate | Pentylene Glycol

Panax Ginseng Extract | Swertia Japonica Extract | Pumpkin Seed Extract | Acorus Calamus Root Extract

Biotin | Biotinoyl Tripeptide-1 | Myristoyl Pentapeptide-17

Panthenol (Pro-Vitamin B5) | Serenoa | Serrulata Fruit Extract | Tocopherol (Vitamin E) | Oligopeptide-10

A product photo of an open bottle of Tsu Sei eyelash serum, showcasing the applicator wand. The image highlights the clean be

TSU:SEI Biotin Boost Complex

Unites biotin with clinically studied peptides to fuel lash growth at the root. Supported by nutrient-rich botanicals, a blend of conditioning and protective actives, and an active hydration system, every drop of our serum is optimised to deliver

longer, stronger, healthier-looking lashes.

Get more. Spend less. Clean beauty without compromise.