Trinsic Natural Brow Serum
Enhancing & Conditioning Brow Serum for Thicker, Longer, Healthier Eyebrows. 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 dyed, laminated, tattooed and microbladed eyebrows.
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."
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Trinsic Enhancing Brow Gel
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Trinsic Natural Eyelash Growth Serum
Enhancing & Conditioning Lash Serum for Thicker, Longer, Healthier Eyelashes. Gentle & Safe Advanced Formula. 100% Natural. Expe...
Results You Can Expect In 8 Weeks
Achieve longer, fuller, more defined lashes with consistent 8-week 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.
Fuller, More Defined Eyebrow 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 brows, 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, brows feel softer, more flexible, and easier to shape
Wake Up to Brows That Look Stronger
With consistent use, brows 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. Eyebrow look longer, healthier, and naturally fuller.
Safe for LVL, Permed Lashes, Lash Extensions and False Lashes Eyebrow
Prostaglandin-free and irritation-aware, this formula supports the skin and hair without disrupting treatments. It keeps brows looking polished and lifted without dryness, crunch, or compromise.
Visible Fuller Eyebrow in Weeks
With consistent use, sparse areas appear denser and shape holds better. Many notice smoother, more conditioned brows in 2 weeks, with fuller-looking definition building by weeks 8–12.
Your Trinsic Natural Brow Serum Journey
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1-2 Weeks
Softer, Healthier Base
brows feel less dry and brittle. Shedding slows, and the hairs sit smoother against the skin, creating a stronger foundation for fuller-looking growth.
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2-4 Weeks
Noticeably Stronger Brows
brows feel more hydrated and conditioned, with reduced brittleness and shedding, creating a healthier base for visible growth.
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6-8 Weeks
Fuller, Denser Appearance
The brow line looks more filled in and defined. Gaps soften, density improves, and brows require less daily penciling or reshaping.
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10-12 Weeks
Peak Definition
brows 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
Instead of aggressive growth actives, Trinsic formulas rely on a Triple-A botanical base and 36 carefully selected ingredients that support hydration, comfort, and the natural lash and brow environment over time.
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.
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.
Niki
Easy to Use
Product is easy to use and causes no irritation. It conditions my eyebrows and they appear thicker and healthier. I am happy with the results.
Wilson
Really Helped
Very gentle on the skin, which helps for use on all skin types! It really helped nourish, hydrate, and strengthen my brows. I felt and noticed the difference fairly quickly. A big plus for me is that it's vegan and free from harsh chemicals, which is always a bonus. Very recommended for a natural boost to brow growth!
Thomas B.
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 Brow Serum
Enhancing & Conditioning Brow Serum for Thicker, Longer, Healthier Eyebrows. Gentle & Safe Advanced Formula. 100% Natural. Experience Natural Growth With Our: Prostaglandin Free Formula ...
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."
