Nu Colour Lash + Brow Serum (UK)

The Office Air-Con Problem Nobody Talks About — and What It's Doing to Your Lashes

If you work in a London or Manchester office where the air conditioning runs all day and the central heating kicks in the moment you get home, your lashes and brows are operating in a permanently moisture-depleted environment. Add daily mascara, the odd lash curler, and perhaps a phase of lash extensions in your past, and it's no surprise that fine, sparse, snapping lashes have become your new normal. The Nu Colour Lash + Brow Serum (£39.90) is a once-nightly peptide, red clover, and amino acid treatment designed to address this at the follicle level — supporting the natural hair growth cycle rather than simply coating existing lashes with a temporary thickening film. In Nu Skin's clinical study, participants showed thicker, longer-looking lashes within 4 weeks of daily use, with continued improvement through 12 weeks.

Best suited for: Lashes thinned by extensions, daily mascara use, or air-conditioned work environments; brows in recovery from over-plucking; anyone who wants a peptide-based alternative to prostaglandin serums
Less suited for: Anyone seeking a medically licensed growth treatment; those with active eye infections or recent eye surgery
Pairs well with: ageLOC LumiSpa iO IdealEyes Brightening Eye Cream (£43.00) for the under-eye area; Nu Colour Curling Mascara – Black (£25.00) for daytime wear over treated lashes

What Makes Nu Colour Lash + Brow Serum Different

Most lash serums available at Boots or in UK department stores fall into one of two camps: prostaglandin-based formulas that extend the growth phase pharmacologically (with associated risks including potential iris colour changes and orbital fat loss with prolonged use), or lightweight conditioning oils that simply coat the hair shaft for a temporary appearance of thickness. Nu Colour Lash + Brow Serum takes a formulation approach that sits between these two extremes — peptides and botanical actives that support the natural growth cycle without the side effects linked to prostaglandin chemistry.

The dual-ended applicator — a fine tip for the lash line and a broader brush for brows — means a single product handles both areas without needing separate tools or products. Crucially, the formula is oil-free, which matters if you wear lash extensions: oil-based serums dissolve the cyanoacrylate adhesive used in lash extension application. This serum is safe to use between extension appointments to strengthen the natural lashes underneath. The formula is also ophthalmologist-tested for safety around the delicate eye area.

Key Ingredients

Red Clover Extract

Contains biochanin A, an isoflavone that supports the anagen (active growth) phase of the hair cycle and helps reduce premature hair shedding. By extending the natural growth cycle, lashes and brows grow longer before they reach the natural shedding phase — a meaningful difference from surface-level conditioning alone.

Amino Acid Blend

Provides the protein building blocks that lash and brow hairs require during the growth phase. Supports stronger, more resilient hair formation from the root outward — particularly relevant when hairs are repeatedly stressed by mascara application and removal.

Peptide Complex

Short-chain amino acid sequences that condition the follicle environment and strengthen the structural integrity of each growing hair, reducing brittleness and breakage — the primary cause of lashes looking short and sparse when growth is actually occurring but hairs are snapping mid-length.

A Note on Regulation

This is a cosmetic serum regulated under UK Cosmetics Regulation (retained EU law), not a medicinal product. It is not subject to MHRA licensing as a medicine and makes no pharmacological claims. If you have questions about prescription lash treatments, consult your GP or a registered ophthalmologist.

How Nu Colour Lash + Brow Serum Compares

Product	Active Ingredient Approach	Oil-Free?	Dual Lash + Brow?	Ophthalmologist-Tested?
Nu Colour Lash + Brow Serum	Peptide complex + red clover extract (biochanin A) + amino acid blend — supports growth cycle at follicle level	Yes	Yes — dual-ended applicator	Yes
Boots No7 Lash & Brow Serum	Peptide-based conditioning; primarily targets surface strengthening and conditioning rather than growth-cycle support	Formula not disclosed	Yes	Ophthalmologist-tested
Elemis Pro-Collagen Eye & Brow Serum	Marine collagen and botanical oils; conditioning focus with no specific growth-cycle botanical (red clover / biochanin A absent)	Oil-containing	Primarily eye area; brow application secondary	Not stated
The Ordinary Multi-Peptide Lash & Brow Serum	Multi-peptide blend including Procapil and Redensyl; strong ingredient transparency but no clinician study data published for this formulation	Yes	Yes	Not stated

Competitor information sourced from publicly available product pages. Formulation comparisons reflect ingredient composition differences only — no overall quality ranking is implied.

How to Use

Apply once daily in the evening, after removing all eye makeup and cleansing the eye area. Use the fine-tip applicator along the upper lash line — as you would apply a liquid eyeliner — and the broader brush through the brows. The serum absorbs into the skin at the base of the lashes and brows, where the follicles are; you do not need to coat individual lashes.

• Avoid applying to the lower lash line — the serum can migrate into the eye during sleep, and lower lashes benefit from incidental transfer from the upper application.
• Allow the serum to absorb fully before applying eye cream or any other product over the area.
• Consistency is essential: the lash growth cycle is approximately 4–8 weeks, so daily application for a minimum of 4 weeks is required before visible results can be expected.
• Most users report the most noticeable improvement between weeks 8–12. Once you reach your desired result, reduce to 3–4 applications per week for maintenance.

Frequently Asked Questions

How quickly will the Nu Colour Lash + Brow Serum be delivered in the UK?

Orders ship from the Nu Skin UK warehouse and typically arrive within 2–4 business days across mainland UK. Scotland, Northern Ireland, and the Scottish Highlands may experience slightly longer delivery windows. As a UK-based operation post-Brexit, there are no EU customs delays for UK orders.

Is this serum safe to use alongside lash extensions?

Yes. The oil-free formula will not dissolve the cyanoacrylate adhesive used in lash extension application. Many users apply it between extension appointments to condition and strengthen their natural lashes beneath the extensions.

Can this change the colour of my eyes or the skin around them?

No. Unlike prostaglandin-based serums (such as those containing bimatoprost), the Nu Colour formula uses peptides, red clover extract, and amino acids — a different class of actives entirely, which do not carry the risk of iris pigmentation changes or periorbital darkening associated with prostaglandin chemistry.

How long does one tube last with daily use?

With daily application to both the lash line and brows, a single tube typically lasts approximately 8–10 weeks — aligning conveniently with the timeframe needed to see the most noticeable improvement.

Can I apply this under or over makeup?

This serum is formulated for evening use on cleansed skin — not worn under makeup. Apply it as the final step in your evening eye-care routine, after cleansing and any eye cream, and allow it to absorb fully before sleep.

I've been plucking my brows since the 1990s — is this realistic for significant regrowth?

Where follicles have been repeatedly damaged over many years, some will no longer be active. This serum supports existing active follicles and the hairs currently in cycle — it cannot reactivate permanently dormant follicles. For very sparse brows with long-standing follicle damage, results may be more modest. If in doubt, consult a trichologist or dermatologist for a clinical assessment.

Is this product registered under UK Cosmetics Regulation?

Nu Skin products sold in the UK comply with the UK Cosmetics Regulation (retained EU law), which requires cosmetic products to be registered on the UK's Office for Product Safety and Standards (OPSS) Cosmetics Registration Service. This serum is a cosmetic product — not a medicinal product — and is not subject to MHRA licensing as a medicine.

Works Well With

• ageLOC LumiSpa iO IdealEyes Brightening Eye Cream (£43.00) — apply under the eye area as part of the same evening routine
• Nu Colour Curling Mascara – Black (£25.00) — for daytime wear over treated, strengthened lashes
• Beauty Focus Collagen+ (£59.90) — ingestible collagen supplement to support hair and skin structure from within
• ageLOC LumiSpa iO Cleansing Kit (£179.00) — thorough evening cleanse of the eye area before serum application

Sources & References

• Nu Skin UK official product documentation: nuskin.com/en_GB (2024)
• Biochanin A and hair growth: Choi, N. et al. (2014). "Biochanin A promotes anagen signalling via the PI3K/Akt/β-catenin pathway in dermal papilla cells." Food and Chemical Toxicology. Available via PubMed: pubmed.ncbi.nlm.nih.gov
• UK Cosmetics Regulation (retained EU law): gov.uk — Cosmetic products: how to register

Individual results may vary. This product is intended for cosmetic use only and is not designed to diagnose, treat, cure, or prevent any disease or medical condition. Discontinue use if irritation occurs and consult a dermatologist or your GP. Patch test recommended before first use. Clinical results referenced are from studies conducted or commissioned by Nu Skin Enterprises, Inc. and may not reflect typical consumer experience.

*Independent Nu Skin Brand Affiliate — not produced or endorsed by Nu Skin Enterprises Inc.