Over 10,000+ Happy Customers
Trinsic Natural Brow Serum
Prostaglandin-free multi-peptide eyebrow serum for thicker, fuller, healthier brows.
- check See visibly thicker, fuller eyebrows in just 3–4 weeks.
- check Prostaglandin-free formula — no irritation, no redness, no flaking.
- check Gentle enough for sensitive skin, post-lamination brows & brow tints.
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DESCRIPTION
Trinsic Natural Brow Serum is a prostaglandin-free eyebrow growth serum powered by five targeted peptides, biotin, caffeine, castor oil, and a blend of botanical extracts including aloe vera, chamomile, and green tea. The advanced multi-peptide brow serum stimulates brow follicles, reduces fallout, and hydrates from root to tip - without the irritation or dryness associated with prostaglandin-based formulas.
Whether you’re dealing with sparse, over-plucked, or naturally thin eyebrows, this eyebrow regrowth serum helps restore thickness and fullness. See visible eyebrow growth in 3–4 weeks, with full results in 8–12 weeks.
Suitable for all skin types, sensitive skin, post-lamination care, and brow tints. Works for both men and women. Vegan. Cruelty free. Made in the UK.
THE SCIENCE
1. Cleanse your face and ensure your brow area is free of makeup and skincare products.
2. Using the precision applicator, brush a thin layer of serum through each eyebrow, working from the inner brow to the tail. Focus on any sparse or patchy areas.
3. One to two dips of the wand is enough for both brows. Allow 1–2 minutes to dry before applying skincare or makeup.
4. Apply every morning and night for rapid brow growth. Start seeing improvements in 3–4 weeks. For full results, use consistently for 8–12 weeks.
5. Once you achieve your desired thickness and fullness, maintain by applying 3–4 times per week.
INGREDIENTS
Aqua (Water), Aloe Barbadensis Leaf Juice, Glycerin, Pentylene Glycol, Sodium Hyaluronate, Hydrolyzed Chenopodium Quinoa Seed, Serenoa Serrulata Fruit Extract, Caffeine, Biotin, Ricinus Communis (Castor) Seed Oil, Tocopherol, Panthenol, Sodium Benzoate, Potassium Sorbate, Lactic Acid, Cysteine, Proline, Hydroxyproline, Glutamic Acid, Serine, Glycine, Myristoyl Hexapeptide-16, Myristoyl Tetrapeptide-12, Biotinoyl Tripeptide-1, Myristoyl Pentapeptide-17, Acetyl Tetrapeptide-3, Cellulose, Algae Extract, Sodium PCA, Allantoin, Betaine, Chamomilla Recutita (Matricaria) Flower Extract, Larix Europaea Wood Extract, Camellia Sinensis Leaf Extract, Trifolium Pratense (Clover) Flower Extract, Olea Europaea (Olive) Leaf Extract, Pisum Sativum (Pea) Sprout Extract
HOW DOES IT WORK
Your eyebrows grow in three natural phases: the anagen (growth) phase, catagen (transition) phase, and telogen (resting) phase. Trinsic’s eyebrow growth serum works by targeting each stage:
Anagen Phase (Growth): Five peptides - including Biotinoyl Tripeptide-1, Acetyl Tetrapeptide-3, and Myristoyl Pentapeptide 17 — stimulate the brow follicle and extend the active growth phase, giving eyebrow hairs more time to grow thicker and fuller. Caffeine boosts circulation to the follicle, accelerating nutrient delivery where it’s needed most.
Catagen Phase (Transition): Biotin, panthenol (vitamin B5), and amino acids including cysteine, proline, and glycine strengthen and reinforce each brow hair during the transition phase, reducing premature shedding and breakage — a key cause of thin, patchy eyebrows.
Telogen Phase (Rest): Sodium hyaluronate deeply hydrates the brow line, while botanical extracts — chamomile, green tea, clover flower, olive leaf, pea sprout, and saw palmetto — nourish dormant follicles and create the ideal environment for healthy new eyebrow growth. Castor oil conditions and protects each hair, reducing brittleness.
This is why consistent daily application delivers the best results — you’re supporting every brow hair at every stage of its cycle.
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Frequently Asked Questions
Got questions? We’ve got answers!
Can I return it if I’m not happy?
Yes. If you’re not satisfied with your Trinsic Brow Serum, contact us and we’ll arrange return. Your satisfaction matters to us.
What makes Trinsic different from other eyebrow serums?
Trinsic is a prostaglandin-free eyebrow growth serum powered by five targeted peptides, caffeine, biotin, and castor oil. Most competing brow serums use either prostaglandins (which can cause irritation and skin sensitivity) or only 1–3 active peptides. Trinsic delivers a more advanced multipeptide formula without the harsh side effects — making it one of the top rated brow serums available in the UK.
How long until I see results?
Most customers notice thicker, fuller-looking eyebrows within 3–4 weeks of consistent daily use. Full results — maximum thickness and density — typically appear by 8–10 weeks as your natural eyebrow growth cycle completes. For the fastest eyebrow growth, apply morning and night without missing days.
Is Trinsic Brow Serum safe for sensitive eyes?
Yes. Our sensitive eyebrow growth serum is formulated without prostaglandins, harsh chemicals, or fragrances. It contains soothing ingredients like aloe vera, chamomile, and allantoin — making it a gentle brow treatment suitable for all skin types, including sensitive and reactive skin.
Can I use it after brow lamination?
Absolutely. Trinsic works as an ideal brow treatment post-lamination, helping to condition, hydrate, and strengthen brows after chemical processing. It’s also compatible with brow tints, microblading, and threading.
Does it work for men?
Yes. Trinsic Natural Brow Serum is designed for both men and women. Whether you want thicker eyebrows for a bolder look or you’re dealing with thinning brow hair, our peptide brow serum helps restore natural fullness. It’s one of the best eyebrow growth serums for men on the market.
Can it help with over-plucked eyebrows?
Yes. Our eyebrow regrowth serum is specifically formulated to revive dormant follicles. The combination of five peptides, castor oil, and caffeine stimulates regrowth in areas that have been over-plucked, over waxed, or thinned over time. Consistent use is key — most customers see significant eyebrow regrowth within 8–10 weeks.
Is this eyebrow serum vegan?
Yes. Trinsic Natural Brow Serum is 100% vegan and cruelty-free. It’s formulated with plant-based ingredients and is never tested on animals.
What are the key ingredients?
Five peptides (Biotinoyl Tripeptide-1, Myristoyl Pentapeptide-17, Acetyl Tetrapeptide-3, Myristoyl Hexapeptide-16, Myristoyl Tetrapeptide-12), biotin, caffeine, panthenol (vitamin B5), sodium hyaluronate, castor oil, and botanical extracts including aloe vera, chamomile, green tea, clover flower, olive leaf, pea sprout, and saw palmetto.
What does the castor oil do?
Castor oil is a natural eyebrow conditioner that moisturises, strengthens, and protects brow hairs. Rich in ricinoleic acid, it helps reduce breakage and brittleness — working alongside our peptide complex to support thicker, healthier eyebrow growth. It’s one of the most trusted natural ingredients for eyebrow care.
How fast will my order arrive?
We offer free UK shipping on all orders. Most orders are dispatched same day and arrive within 1–3 working days.
