Trinsic Natural Eyelash Growth Serum
Enhancing & Conditioning Lash Serum for Thicker, Longer, Healthier Eyelashes. Gentle & Safe Advanced Formula. 100% Natural.
Experience Natural Growth With Our:
- Prostaglandin Free Formula
- Multi-Peptide Complex
- Combination of Hyaluronic Acid, Vitamin B5, Biotin & Vitamin E
- Unique Blend of 4 Plant Extracts
Compatible with lash extentions, false eyelashes, LVL lashes, permed & tinted eyelashes.
Ingredients
How do I use this product?
When will I see results?
Most customers begin to see visible improvements in 4-6 weeks, with full results by 8-12 weeks of consistent daily use.
Is it safe for sensitive eyes?
Yes. Our formula is gentle, prostaglandin free and safe for sensitive eyes and skin.
What is your return policy?
We offer a 90-day satisfaction guarantee. If you're not completely happy, contact us for a full refund.
Are there any side effects?
Trinsic is prostaglandin-free so you won't experience the irritation, discoloration, or orbital fat loss linked to harsher formulas.
How long does one bottle last?
One bottle lasts approximately 45 days with twice daily use and 90 days with once daily use.
"I have incredibly sensitive eyes. False lashes simply aren’t an option for me, and even wearing mascara can cause discomfort. I have no idea how this serum works, but rather than my eyes feeling sore, it actually provides relief."
Buy Any 2 Save 15% / Buy Any 3 Save 20%
TRINSIC Trinsic Enhancing Brow Gel
Enhancing & Conditioning Brow Gel for Thicker, Longer, Healthier Eyebrows. Gentle & Safe Advanced Formula, Powered With Plant Extracts & Multi-Pe...
TRINSIC Trinsic Natural Brow Serum
Enhancing & Conditioning Brow Serum for Thicker, Longer, Healthier Eyebrows. Gentle & Safe Advanced Formula. 100% Natural. Experience Natural Growth...
Results You Can Expect In 8 Weeks
Achieve longer, fuller, more defined lashes with consistent use.
With consistent daily use, lashes and brows look progressively healthier, fuller, and more defined. In the first few weeks, you may notice improved hydration and less brittleness. By weeks 6–8, many users see visibly thicker-looking lashes, better density through the lash line, and brows that appear more filled in and easier to shape. With full results by week 12.
Fuller, More Defined Eyelashes in 3 Simple Steps
There's no harsh growth cycle, complicated routine, or stiff, overdone finish.
Brush On Before Bed
Glide a thin layer onto clean, dry lashes, especially where they look sparse or uneven.
Let It Absorb While You Sleep
In under a minute, it settles in without any flakes or crunch. By morning, lashes feel softer, more flexible, and easier to shape
Wake Up to Brows That Look Stronger
With consistent use, lashes appear gradually fuller and more filled in. Gaps look softer. Shape holds better. And you spend less time fixing them every day.
Clean, Conditioning Hold Every Day
Powered by our Triple-A base (Algae, Aloe Vera & Amino Acids), this lightweight formula visibly improves the lash line. Eyelashes look longer, healthier, and naturally fuller.
Safe for LVL, Permed Lashes, Lash Extensions and False Lashes Eyelashes
Prostaglandin-free and irritation-aware, this formula supports the skin and hair without disrupting treatments. It keeps lashes looking polished and lifted without dryness, crunch, or compromise.
Visible Fuller Eyelashes in Weeks
With consistent use, sparse areas appear denser and shape holds better. Many notice smoother, more conditioned lashes in 2 weeks, with fuller-looking definition building by weeks 8–12.
Your Trinsic Natural Eyelash Growth Serum Journey
1-2 Weeks
Softer, Healthier Base
lashes feel less dry and brittle. Shedding slows, and the hairs sit smoother against the skin, creating a stronger foundation for fuller-looking growth.
2-4 Weeks
Noticeably Stronger Brows
lashes feel more hydrated and conditioned, with reduced brittleness and shedding, creating a healthier base for visible growth.
6-8 Weeks
Fuller, Denser Appearance
The lash line looks more filled in and defined. Gaps soften, density improves, and lashes require less daily penciling or reshaping.
10-12 Weeks
Peak Definition
lashes look noticeably fuller from the inner corner to the tail, with fewer gaps to fix and less time spent penciling them in each morning.
Naturally Derived Ingredients
Trinsic's advanced formula brings together 37 naturally powerful ingredients — each chosen for its proven role in hydration, follicle nourishment and growth support.
Castor Oil
Conditions and coats each hair to improve the look of thickness and smoothness.
Coffee
Energizes the lash line and supports a healthier-looking follicle environment.
Quinoa Protein
Helps reinforce the structure of each hair, supporting strength.
Saw Palmetto
Supports strength and structure, which helps reduce the brittle look.
Hyaluronic Acid
Attracts moisture to keep lashes and brows hydrated and flexible.
Biotin (Vitamin B7)
Supports hair health at the follicle level.
Vitamin E
Conditions and helps protect the delicate lash and brow area.
Panthenol (Vitamin B5)
Smooths and softens hair so lashes and brows look healthier.
What People Are Saying
Real reviews from people who use Trinsic products daily.
Worth It!
I’ve been really impressed with this eyebrow serum. It’s gentle, easy to apply, and absorbs quickly without any irritation. After a few weeks of consistent use, my brows look fuller, healthier, and more defined, especially in sparse areas. I like that it’s prostaglandin free and packed with nourishing ingredients like castor oil and peptides.
Kavya Reddy
Easy Application - No Mess
I have sensitive eyes and wear contact lenses. The tiny little brush makes the application easy and comfortable and I had no irritation to my eyes — no chemical smells or scents. My lashes became softer and thicker. It feels like a luxury product at an affordable price point.
JB
Quick Results
It has quickly jumped into action and after a few days use I can already see the difference! Absolutely cannot wait to see what is to come from continuously using this! Great amount and easy to apply.
Thomas B.
This One Works!
This is the 4th eyelash serum I’ve tried and this one really does the job. The eyelashes on one eye had become really short and sparse for some reason, so in desperation I tried this serum. Used it every night for 2 or 3 weeks and avoided mascara unless I was going out somewhere significant! My eyelashes have now grown back healthily - very happy! I will continue to use it a few times a week.
Kathy D.
No Irritation
It’s very good as the product helps reduce the excessive shedding of my eyelashes. Quite happy with this. I used it and it didn’t leave any marks or irritation — my eyes didn’t water in contact with the product even though they are quite sensitive. The applicator is good and it slides nicely on the eyelashes; it doesn’t clump up with the product.
Matthew S.
Amazing Product
This is an amazing product. Firstly, it is very easy to apply. It glides on smoothly with no mess. I have been using this for a couple of weeks now and have already noticed an improvement in the thickness of my eyelashes. Looking forward to seeing the difference in another couple of weeks.
Louise Orne
Better
Left my brows feeling hydrated and I definitely noticed a difference. Will keep using.
Cheryl
Excellent Quality Serum
A really good serum. The product was easy to apply with the wand. The right amount of product came out each time to cover one brow. I have been using it for a couple of weeks now and noticed an increase in thickness. Will continue using.
Louise Orme
Great
I’ve been using the Trinsic Eyelash Serum consistently and I’m really impressed. It’s gentle on the eyes, doesn’t cause irritation, and feels lightweight. After a few weeks, my lashes look healthier, stronger, and noticeably fuller. I like that it’s prostaglandin free and made in the UK. Easy to apply and good quality packaging. Would definitely recommend for anyone wanting natural lash improvement.
Jiki
Amazing
Powerhouse ingredients, visible results. I bought this specifically for the peptides and biotin combo. It’s a great alternative to the expensive hormone-based serums. My lashes feel stronger and I’m seeing less fallout when I take my makeup off. The applicator is precise and the bottle lasts a long time.
JA.
Looking Fuller
This is a fantastic product to lengthen and thicken your lashes. I feel like my lashes are looking fuller and healthier. So easy to apply and doesn’t irritate my eyes as other serums have done.
Julie Ann B.
Easy To Apply
It’s super easy to apply, which is a real bonus. I’ve been using the Trinsic Eyelash Serum consistently and have been pleased with how gentle and lightweight it feels. It hasn’t caused any irritation, and over a few weeks I’ve noticed my lashes looking healthier, stronger, and a little fuller. It’s been a simple product to add to my routine, and the results so far have been reassuring.
Em
Frequently Asked Questions
Everything you need to know about Trinsic.
Should I apply the serum morning or night?
Trinsic products can be used either morning and or evening. We recommend once per day usage but the products can be used twice a day.
Are the serums free from parabens, sulphates, and fragrance?
Yes. All Trinsic formulas are completely free from parabens, sulphates, fragrance and harsh ingredients.
Can I use the serums with makeup?
Yes all products can be used under or alongside make-up.
Can I use the lash serum on my eyebrows too (or vice versa)
We do not recommend using our lash serum on the eyebrows and visa versa. Each prduct has the best applicator for the dedicated area. Trinsic offer muti-buy promotions automatically applied at checkout for customers to get the best value for money if they want to treat two areas.
What are the key active ingredients in Trinsic serums
Trinsic lash and brow serums use a prostaglandin-free, multi-active complex across 36 active ingredients, including:
- Multi-Peptide Complex — signals follicles to produce keratin, the protein lashes and brows are made of
- Biotin (Vitamin B7) — supports keratin synthesis at the cellular level
- Castor Oil — conditions the hair shaft and reduces breakage
- Hyaluronic Acid — creates a moisture barrier to improve lash and brow flexibility
- Caffeine — stimulates microcirculation to enhance nutrient delivery to the follicle
- Algae Extract — supports density and resilience
- Panthenol (Vitamin B5) — smooths and softens hair
- Aloe Vera — soothes and conditions the delicate eye area
- Chamomile — calms and reduces sensitivity around the lash and brow area
All Trinsic serums are 100% prostaglandin-free — meaning no risk of iris pigmentation changes or skin discolouration associated with prostaglandin-containing lash serums.
Are Trinsic serums safe for sensitive eyes?
Yes Trinsic serums are suitable for those with sensisitve eyes.
Is Trinsic safe to use during pregnancy or breastfeeding?
Trinsic lash serums, brow serums, and brow gel do not contain prostaglandins, retinoids, or other ingredients with known pregnancy contraindications. The formulas use gentle peptides, plant-derived actives, and vitamins.
As with any cosmetic applied near a mucous membrane, we recommend consulting your GP or midwife before use during pregnancy or while breastfeeding.
Are Trinsic serums vegan and cruelty-free
Yes. All Trinsic products are:
✓ Vegan
✓ Cruelty-Free
✓ Paraben-Free
✓ Sulphate-Free
✓ Fragrance-Free
✓ Prostaglandin-Free
✓ Made in the UK
All Trinsic products are formulated without synthetic fragrances, prostaglandins, parabens, or sulphates. Full INCI ingredient lists are printed on every product and published on each product page.
Trinsic Natural Eyelash Growth Serum
Enhancing & Conditioning Lash Serum for Thicker, Longer, Healthier Eyelashes. Gentle & Safe Advanced Formula. 100% Natural. Experience Natural Growth With Our: Prostaglandin Free Formula...
ADD TO CART - £34.99
Natural, Plant-Based Ingredients
Effective for Men & Women
Formula with 36 Key Ingredients"This is an amazing product. Firstly, it is very easy to apply. It glides on smoothly with no mess. I have been using this for a couple of weeks now and have already noticed an improvement in the thickness of my eyelashes. Looking forward to seeing the difference in another couple of weeks."