15 Best Scalp Serum in Singapore that Soothe & Balance

Tired of scratching your scalp midday or wondering why your hair keeps thinning despite all your shampoo changes? 

Well it’s not just you wondering, we get this hair care question all the time from clients. 

Between sweat, scorching sun, and hair colouring, our scalps take a daily beating, and scalp serums are the step most people skip.

This guide reviews 15 scalp serums that actually work in Singapore's heat and humidity, from dermatologist-recommended picks to K-beauty tonics and stem cell-based innovations. 

Whether you're dealing with sebum, sensitivity, or slow regrowth, this list helps you find the right fix.

Scalp Serum Comparison Table (2025)

Product Name	Key Benefits	Ideal For	Texture
Act + Acre Cold Pressed Stem Cell Scalp Serum	Stem cell blend for healthy scalp barrier	Dry, sensitive, or stressed scalps	Lightweight, cooling fluid
Nutrafol Hair Serum	Hair growth with ashwagandha exosomes	Thinning hair and stressed scalp	Fast-absorbing serum
Vegamour GRO Hair Serum	Plant-based formula for fuller hair	Daily use for volume and thickness	Non-greasy daily drops
The INKEY List Salicylic Acid Oily Scalp Treatment	Salicylic acid clears oil and buildup	Oily, itchy or acne-prone scalp	Clear gel-texture treatment
Kérastase Nutritive Hydrating Scalp Serum	Hydrating for dry and flaky scalp	Flaky, dry, or tight-feeling scalp	Milky hydrating fluid
OLAPLEX No.0.5 Scalp Longevity Treatment	Scalp longevity and barrier strengthening	Ageing, inflamed, or weakened scalp	Light gel-lotion
Aromatica Rosemary Root Enhancer	Soothing, energising K-Beauty rosemary	All scalp types, especially weak roots	Water-light mist
Calecim Advanced Hair System	Exosome ampoule for scalp regeneration	Severe hair loss or post-medical treatment	High-performance ampoule
NUXE Scalp Serum	Botanical peptides, firming action	Mild irritation and hydration boost	Fluid botanical serum
CÉCRED Hair Density Booster	Density support, celebrity-backed launch	Early thinning and density support	Silky leave-in serum
HairRepro Scalp Grow α EX V5	Japanese ginseng formula for circulation	Hair loss with poor circulation	Light herbal essence
HairRepro Scalp Grow β EX V5	Advanced anti-thinning upgrade	Progressive thinning, hormonal loss	Refined Japanese tonic
Kérastase Genesis Anti‑Hair Fall Serum	Peptide serum to reduce breakage	Breakage-prone or postpartum shedding	Lightweight serum spray
OUAI Scalp Serum	Hydrating and balancing daily serum	Normal to oily scalp hydration	Water-like with subtle scent
Clynn Scalp Tonic 01 Strong Roots	Local DHT blocker for root strength	Oily roots and hormonal shedding	Botanical tonic mist

1. Act + Acre Cold Pressed Stem Cell Scalp Serum

A cooling serum that restores balance and improves scalp elasticity.

Formulated with cold-pressed stem cell extracts, this serum supports a healthy scalp barrier and reactivates hair growth at the root. It’s lightweight, residue-free, and won’t weigh you down, yes even in Singapore’s humidity.

It’s great for dry, itchy, or sensitive scalps caused by styling, sweat, or over-washing. Many users report less tightness and visible flake reduction after a few weeks of consistent use.

• Price: $72 SGD
• Ideal For: Dry, stressed, or flaky scalps
• Texture: Lightweight cooling fluid
• Use Tip: Apply post-shower on towel-dried scalp 2–3x weekly

2. Nutrafol Hair Serum

A fast-absorbing growth serum that boosts scalp density and resilience.

Powered by patented Ashwagandha Exosome technology, Nutrafol’s serum addresses hair thinning from within by signalling follicle repair. The water-light serum sinks in quickly with no stickiness or residue.

Especially helpful for stress-related hair thinning, postpartum hair loss, or early signs of receding. Use consistently and expect visible results in about 90 days.

• Price: $108 SGD
• Ideal For: Thinning hair, early-stage shedding
• Texture: Fast-absorbing liquid serum
• Use Tip: Use once daily, morning or night, on dry or damp scalp

3. Vegamour GRO Hair Serum

Plant-powered drops that support thicker, fuller hair with zero harsh chemicals.

This vegan serum uses mung bean, curcumin, and red clover to stimulate visibly denser growth over time. It’s non-greasy, clean, and designed for daily application, even if you skip the occasional hair wash days.

This is perfect for those who want a botanical option for volume without irritation. Ideal for mild thinning or just general maintenance.

• Price: $99 SGD
• Ideal For: Fine, thinning, or flat hair
• Texture: Non-greasy daily drops
• Use Tip: Apply along part lines and massage in every morning

4. The INKEY List Salicylic Acid Oily Scalp Treatment

An affordable, targeted formula that unclogs pores and removes excess oil.

This pre-wash serum uses salicylic acid (2%) to exfoliate the scalp gently, reducing itch, flakes, and product buildup. It’s great for oily roots, humid weather, or frequent styling.

If your scalp feels greasy by midday or reacts to heavy conditioners, this serum can restore balance fast.

• Price: $25 SGD
• Ideal For: Oily, itchy, or acne-prone scalps
• Texture: Clear gel-based serum
• Use Tip: Apply 10 minutes before shampooing, 1–2x per week

5. Kérastase Nutritive Hydrating Scalp Serum

A milky serum that instantly relieves dryness and tightness without residue.

Enriched with niacinamide and glycerin, this serum delivers hydration directly to the scalp barrier while maintaining soft, touchable hair. It’s lightweight enough for frequent use and works especially well under the Singapore sun.

Great for dry scalps caused by air-conditioning, bleaching, or environmental stress. Provides lasting comfort and reduces itch-related scratching.

• Price: $78 SGD
• Ideal For: Flaky, tight, or reactive scalps
• Texture: Milky hydrating fluid
• Use Tip: Use daily or after sun exposure on clean scalp

6. OLAPLEX No.0.5 Scalp Longevity Treatment

A barrier-strengthening serum that combats ageing and inflammation at the root.

OLAPLEX’s scalp serum contains hyaluronic acid, peptide complexes, and antioxidant-rich ingredients to soothe, repair, and protect thinning-prone scalps. It’s part of their bond-building family, but made specifically for skin, not hair.

Use it if your scalp feels irritated, red, or weakened from years of chemical colouring or age-related thinning. Results build gradually with consistent use.

• Price: $90 SGD
• Ideal For: Ageing, sensitive, or chemically compromised scalps
• Texture: Light gel-lotion
• Use Tip: Apply to dry scalp before styling or bedtime; no rinse needed

7. Aromatica Rosemary Root Enhancer

A K-Beauty favourite that refreshes, soothes, and energises the scalp daily.

Made with organic rosemary oil extract and biotin, this mist-like serum stimulates blood flow and creates a cooling sensation on contact. It’s vegan, silicone-free, and great for both men and women.

Highly recommended for itchy, dull-feeling scalps or as a midday reset during hot weather.

• Price: $38 SGD
• Ideal For: Weak roots, humidity-triggered itch
• Texture: Water-light mist
• Use Tip: Spray on dry scalp anytime for instant refresh without disrupting style

8. Calecim Advanced Hair System

A high-performance ampoule system using exosomes to trigger follicle repair.

This Singapore-based medical-grade formula features ethically derived stem cell extracts designed to reverse visible hair thinning. It’s used in dermatology clinics, and now available on store shelfs for at-home routines.

Best for users with significant shedding, patchiness, or post-chemo recovery.

• Price: $460 SGD (set of 6 ampoules)
• Ideal For: Severe hair loss, post-medical recovery
• Texture: Liquid ampoule (non-oily)
• Use Tip: Apply entire ampoule twice weekly after dermarolling or exfoliation

9. NUXE Scalp Serum

A gentle botanical formula that soothes and hydrates without heaviness.

This plant-based serum uses botanical peptides and oat extract to calm irritated scalps while supporting softness and shine. It’s fragrance-light and fast-absorbing, ideal for users with sensitivity to synthetic actives.

Best for mild flaking, tightness, or as a supportive serum during hair growth routines.

• Price: $52 SGD
• Ideal For: Mild irritation, dehydrated scalps
• Texture: Fluid botanical serum

Use Tip: Use nightly after shower or alongside other topical treatments

10. CÉCRED Hair Density Booster

A scalp serum designed to improve density and reduce shedding, backed by Beyoncé’s team.

This new release uses copper peptides, caffeine, and niacinamide to stimulate follicle health and support stronger hair anchoring. It’s fast-absorbing, silky, and comes from a science-backed, celeb-developed brand.

Suited for early-stage thinning, postpartum changes, or anyone looking to add a modern peptide serum to their routine.

• Price: ~$110 SGD
• Ideal For: Thinning roots, density maintenance
• Texture: Silky leave-in serum
• Use Tip: Massage in at night along part lines or receding areas

11. HairRepro Scalp Grow α EX V5

A Japanese scalp essence that boosts circulation and reduces early-stage thinning.

Formulated with ginseng, menthol, and amino acids, this serum is designed to support healthy hair cycles through improved blood flow and root stimulation. It absorbs quickly and leaves a mild cooling sensation.

Best for users with sluggish growth, early signs of hairline recession, or scalp fatigue from frequent styling.

• Price: $88 SGD
• Ideal For: Circulation-boosting, male-pattern thinning
• Texture: Light herbal essence
• Use Tip: Use every evening on clean scalp; no rinse needed

12. HairRepro Scalp Grow β EX V5

An advanced version of the α formula designed for progressive thinning and hormonal hair loss.

With added growth peptides and botanical DHT blockers, this refined tonic helps extend the hair’s growth phase while calming scalp inflammation. It’s a favourite in Japanese cosmeceutical circles.

Recommended for users experiencing chronic or hormonally triggered shedding, especially in the crown or temple areas.

• Price: $110 SGD
• Ideal For: Hormonal hair loss, postnatal or age-related thinning
• Texture: Refined herbal tonic
• Use Tip: Apply daily to targeted areas and massage in gently

13. Kérastase Genesis Anti‑Hair Fall Serum

A well-rounded peptide serum to strengthen fragile hair and minimise breakage.

Packed with aminexil and ginger root extract, Genesis is designed to reinforce the hair anchoring system while energising the scalp. Its lightweight formula doesn’t interfere with styling and dries quickly.

Perfect for users dealing with postpartum shedding, seasonal breakage, or mild mechanical damage from heat tools.

• Price: $82 SGD
• Ideal For: Fragile hair, post-shower shedding
• Texture: Lightweight serum spray
• Use Tip: Use on clean scalp before drying or styling; apply daily for 6 weeks

14. OUAI Scalp Serum

A skincare-inspired serum that balances oil, soothes, and protects the scalp barrier.

This gentle serum contains arctic root, hyaluronic acid, and adaptogens to improve hydration and soothe stress-induced scalp imbalance. With a barely-there texture, it’s excellent for humid climates like Singapore.

Ideal as a lightweight everyday serum to maintain scalp health and calm irritation.

• Price: $78 SGD
• Ideal For: Oily, sensitive, or stressed scalps
• Texture: Water-light serum
• Use Tip: Use morning or night, even on non-wash days

15. Clynn Scalp Tonic 01 Strong Roots

A locally developed scalp tonic that strengthens roots and targets hormonal hair loss.

Clynn’s formula includes saw palmetto, ginkgo biloba, and copper peptides to support DHT regulation and improve root anchoring. It’s especially suited to Singapore’s climate and lifestyle demands.

Best for oily-prone scalps and users looking to prevent long-term thinning before it starts.

• Price: $69 SGD
• Ideal For: Oily scalp, DHT-related shedding
• Texture: Botanical tonic mist
• Use Tip: Use after towel-drying or mid-day refresh; suitable for both men and women

How to Pick the Right Scalp Serum 

The best scalp serum for you really depends on your root cause, not just your hair goals.

But scalp serums aren’t just about regrowth. Some soothe inflammation, others rebalance oil, while a few strengthen hair anchoring over time. 

Picking the wrong type could worsen sensitivity or make hair feel greasy. Here's how to choose based on what your scalp actually needs:

Know What You’re Treating

Different serums are designed for different issues, so start there.

Scalp Concern	What to Look For	Example Products
Itch or flaking	Soothing botanicals, hyaluronic acid	Kérastase Nutritive, Aromatica, OUAI
Oily roots	Salicylic acid, rosemary, mist formulas	INKEY List, Clynn, Aromatica
Hair thinning	Peptides, caffeine, DHT blockers	Nutrafol, Vegamour, CÉCRED, HairRepro β
Stress-related loss	Adaptogens, exosomes, barrier repair actives	OLAPLEX No.0.5, OUAI, Calecim, Nutrafol
Dry/tight scalp	Niacinamide, panthenol, lightweight hydrators	Kérastase Nutritive, NUXE, Act + Acre

Tip: Don’t use a growth serum if your main issue is oil or sensitivity. Treat inflammation first.

Match Texture to Climate and Routine

Heavier serums don’t always equal better results, especially in humid environments like Singapore.

Choosing the right texture can make or break your serum routine. Singapore’s heat and high humidity demand lightweight, fast-absorbing formulas that don’t clog pores or cause midday stickiness.

Here’s how to match texture to your lifestyle:

Texture Type	Best For	Examples
Mist-style sprays	Post-gym use, midday refresh, oily scalps	Aromatica, Clynn
Fluid or gel serums	Daily application, sensitive scalps	Act + Acre, OUAI, Vegamour
Creamy or milky serums	Dry scalps, indoor air-conditioned settings	Kérastase Nutritive, OLAPLEX
Ampoules or oils	Weekly repair, overnight use, post-treatment	Calecim, HairRepro α / β

“If your scalp feels sticky or heavy after use, you’re likely using too much,or using the wrong texture.” - Senior hair stylist from REDS hair salon KSL.

Frequency Matters

Scalp serums work best when used regularly, but not excessively.

Over-applying can irritate sensitive scalps or counteract the effects. The key is to use the right product at the right frequency, just like you would with skincare.

Usage Frequency	When to Use	Recommended Products
Daily	For hydration, oil control, or early thinning	Nutrafol, OUAI, Vegamour
2–3x per week	For scalp rebalancing, inflammation, sebum	Act + Acre, INKEY List, Clynn
Weekly intensive	For repair, regrowth boosts, post-salon care	Calecim ampoules, HairRepro α/β

“Think of scalp serums like layering skincare: consistent, targeted use always beats overload.”

And remember: give it 30 days before judging results, regrowth and scalp rebalancing take time, not miracles.

Find All of the Scalp Serum That Work on Top Secret

At Top Secret, we’ve curated scalp serums that aren't just popular on Tiktok or Facebook, they’re effective, backed by science, and suitable for Singapore’s daily realities. 

Whether you're looking for a cooling mist, a growth-focused ampoule, or a balancing fluid for daily use, you'll find a match that fits both your scalp type and your lifestyle.

The best time to start was yesterday. The second-best time is now.

Find your serum, stick to your routine, and let your scalp thank you in the weeks ahead.

Shop our full selection of hair products for fast, local delivery and product recommendations that make sense.

Frequently Asked Questions About Scalp Serum

What Is The Best Scalp Serum In Singapore For Hair Growth?

Top picks for growth in 2025 include Nutrafol, Calecim Advanced Hair System, and HairRepro β EX V5. These serums target follicles with peptides, exosomes, or DHT blockers.

Can I use Scalp Serum every day?

Yes, many serums like OUAI and Vegamour are designed for daily use. Just be sure it suits your scalp type and doesn’t leave buildup or irritation.

Should I Apply Scalp Serum On Wet Or Dry Hair?

Apply scalp serum on a clean, towel-dried or dry scalp, never soaking wet. This helps actives absorb better and prevents dilutions.

How Long Does It Take For Scalp Serums To Show Results?

Most users see results in 30 to 90 days. Faster relief may come with hydrating or soothing serums, but regrowth takes consistent use.

Are Scalp Serums Safe For Colour-Treated Hair?

Yes, most modern scalp serums are colour-safe. Avoid harsh exfoliating serums post-colouring and stick with gentle, sulfate-free formulas.

Do Scalp Serums Really Work?

Yes, when used consistently and matched to your scalp concern, serums can help soothe irritation, rebalance oil, and support stronger hair growth over time.