Medical Treatments · Hair Restoration · IN Eternity Clinic
H2LT Laser in Singapore
Hair hyperstimulation laser therapy uses low-level red light to support follicles that are thinning but still alive. Performed by Dr Sin Yong at IN Eternity Clinic, usually as one part of a wider hair plan.
Written & medically reviewed by Dr Sin Yong · 8 October 2026
Quick answer
- Hair hyperstimulation laser therapy uses low-level red light to support follicles that are thinning but still alive. Performed by Dr Sin Yong at IN Eternity Clinic, usually as one part of a wider hair plan.
- Used for: Hair Loss in Men, Hair Thinning in Women.
- Performed by: Dr Sin Yong at IN Eternity Clinic, 9 Scotts Road, Pacific Plaza (beside Orchard MRT).
- Enquire: SkinRev Lab, CityLink Mall (City Hall MRT) passes enquiries to the clinic, or contact IN Eternity Clinic directly on +65 8815 3008.
- Suitability, number of sessions and pricing are decided at consultation; individual results vary.
H2LT stands for hair hyperstimulation laser therapy. If you have been looking up H2LT laser Singapore information, the short version is this: it is an in-clinic, low-level laser protocol for thinning hair, performed by Dr Sin Yong at IN Eternity Clinic. It uses gentle red laser light on the scalp to support follicles that are still producing hair, even if those hairs have become fine. It does not cut, heat-damage or remove anything, and there are no needles.
H2LT belongs to a family of treatments called low-level laser therapy (LLLT), or photobiomodulation. Home laser caps and combs work on the same broad principle, but H2LT is delivered on a professional-grade system in a supervised setting, with dosing and scheduling decided by a doctor. It is used for pattern thinning in men and women, for long-running shedding, after childbirth, and to help maintain a hair transplant. It is rarely used alone; it usually sits alongside medical treatment.
How it works
The mechanism,
in plain English
At low power, red laser light does not burn tissue. Instead, it is absorbed by an enzyme in the mitochondria — the energy-producing parts of cells — called cytochrome c oxidase. This is thought to raise cellular energy output, release small amounts of nitric oxide and improve local blood flow around the follicle. The main target is the dermal papilla, the cluster of signalling cells at the base of each hair that controls how long a hair keeps growing.
In pattern hair loss and chronic shedding, too many follicles drift into the resting (telogen) phase, and the growth (anagen) phase gets shorter. Low-level light appears to nudge resting follicles back into growth and help them stay there longer, so hairs come through thicker and are shed less often. This only works on follicles that are still alive. A smooth, shiny bald patch has no active follicles left to stimulate, so no amount of light will change it.
“H2LT can only wake up follicles that are still there — it supports thinning hair, it does not replace hair that has already gone.”
— Dr Sin Yong, IN Eternity Clinic
- Energy / product
- Low-level red laser light (photobiomodulation); non-thermal, non-ablative
- Target layer
- Dermal papilla and hair bulb in the deep dermis of the scalp
- Typical session
- About 15–20 minutes
- Downtime
- Usually none; normal activities the same day
- Works on
- Follicles that are still producing hair, even if the hairs are fine
- Performed by
- Dr Sin Yong, IN Eternity Clinic
Is it right for you
Who it suits,
and who it does not
H2LT suits men and women with early to moderate pattern thinning — a widening parting, a see-through crown or a receding hairline that still has fine hairs. It also suits people with shedding that has dragged on for months, women with hair loss after childbirth once the cause has been checked, and anyone who has had a hair transplant and wants to support the surrounding native hair. It is a reasonable choice for people who cannot take, or would rather limit, prescription medication, and as an add-on for those already on it.
H2LT is not a treatment for areas that are already bald and smooth, and it is not suitable for scarring alopecias, where follicles are destroyed by inflammation. An itchy, flaky or inflamed scalp, such as seborrhoeic dermatitis, is usually settled first, and any scalp infection is treated before starting. People with light-sensitive conditions or on medicines that increase light sensitivity need this reviewed. Pregnancy and breastfeeding are discussed at assessment. Sudden patchy loss or shedding with other symptoms is investigated before any laser is used.
Non-invasive alternative at SkinRev Lab
Rejuran® Scalp Care — Rejuran® Scalp Care at SkinRev is a PDRN treatment, delivered without needles, aimed at scalp condition and comfort. It is a scalp-care session rather than a hair regrowth treatment, so for active thinning or shedding, a doctor's assessment and options such as H2LT come first. Read more
What to expect
Consultation, session
and aftercare
Before starting, Dr Sin Yong confirms the type of hair loss with a history, a magnified scalp examination and, where indicated, blood tests such as iron, zinc and folate. Baseline photographs are taken from fixed angles. If H2LT fits, it is built into a plan with any other treatments you need, and a course is usually planned at consultation, followed by maintenance visits that are spaced further apart once things stabilise.
During a session you sit comfortably with protective eyewear while the laser is applied across the thinning areas. There is no numbing cream. Most people feel nothing, or a faint warmth or tingle. Each visit takes about 15–20 minutes and you can go straight back to work. Many people first notice less shedding, then gradual thickening; visible change is judged over months, and individual results vary.
Where this happens
Assessment and non-invasive care — SkinRev Lab, CityLink Mall #B1-28, 1 Raffles Link, Singapore 039393. Underground from City Hall MRT and Esplanade MRT; a short walk from Raffles Place, Marina Bay, Suntec and Bugis. Open daily 11am–8pm.
Medical treatment — IN Eternity Clinic, 9 Scotts Road, #12-01 Pacific Plaza, Singapore 228210, beside Orchard MRT (three stops from City Hall on the North-South line). Mon–Sat 11am–8pm, closed Sunday. Treatments are performed by Dr Sin Yong. WhatsApp +65 8815 3008.
Enquiries to SkinRev Lab about medical treatments are passed to IN Eternity Clinic, where Dr Sin Yong performs them.
Clinic page: H2LT Laser at IN Eternity Clinic ↗
What the research says
The evidence,
with sources
The strongest single study of low-level laser for hair is a multicentre, randomised, double-blind study comparing a laser device with an identical-looking sham device in men and women with pattern hair loss. Over 26 weeks, terminal hair density increased significantly more in the laser groups than in the sham groups, regardless of age or sex, and no serious adverse events were reported. A 2017 systematic review of 11 studies found that most showed improved hair counts or density, although patient-rated satisfaction was more modest than the measured changes.
A 2025 meta-analysis pooling 38 studies confirmed a significant increase in hair density with low-level laser or LED therapy compared with placebo in androgenetic alopecia, but found too little data to draw conclusions for other types of hair loss. One honest caveat: most published studies used home devices, so evidence specific to in-clinic protocols such as H2LT laser Singapore patients receive is more limited. The underlying mechanism, however, is the same.
References
- Jimenez JJ, Wikramanayake TC, Bergfeld W, et al. Efficacy and safety of a low-level laser device in the treatment of male and female pattern hair loss: a multicenter, randomized, sham device-controlled, double-blind study. Am J Clin Dermatol. 2014;15(2):115-127.
- Afifi L, Maranda EL, Zarei M, et al. Low-level laser therapy as a treatment for androgenetic alopecia. Lasers Surg Med. 2017;49(1):27-39.
- Perez SM, Vattigunta M, Kelly C, Eber A. Low-level laser and LED therapy in alopecia: a systematic review and meta-analysis. Dermatol Surg. 2025;51(2):179-183.
Common questions
Your questions,
answered
H2LT laser Singapore: how many sessions will I need?
A course is usually planned at consultation, because the number depends on the type of hair loss, how long it has been going on and what else is in the plan. H2LT is front-loaded with closer visits at the start, then moves to maintenance visits spaced further apart once shedding settles. Dr Sin Yong reviews progress with standardised photographs before adjusting the schedule.
How much does H2LT cost?
Pricing is given at consultation at IN Eternity Clinic, once Dr Sin Yong has confirmed the cause of your hair loss and decided whether H2LT fits on its own or alongside other treatment. The cost depends on the course and the maintenance plan, and you see it in full before deciding. There is no fixed menu price, because the plan is individual.
Does H2LT hurt?
Most people feel nothing at all, or a light warmth or tingling on the scalp. Low-level laser is non-thermal, which means it is not meant to heat or damage tissue, so no numbing cream or anaesthetic is used. You wear protective eyewear during the session. People with a sensitive or inflamed scalp may feel a little more and are usually treated for that first.
How is H2LT different from a home laser cap?
Both use low-level red light on the same broad principle. The differences are in the setting: H2LT runs on a professional-grade system, the dosing and schedule are set by a doctor, and it follows a proper diagnosis, so you are not using light to treat a thyroid problem or iron deficiency by mistake. Home devices can still be useful for maintenance between clinic visits.
Can women have H2LT?
Yes. Female pattern hair loss, shedding after childbirth and long-running shedding are all common reasons women have H2LT. Women's hair loss often has more than one cause, so blood tests for iron, thyroid and hormonal factors are usually part of the assessment. Pregnancy and breastfeeding are discussed before starting, and the plan is adjusted to fit.
When will I see results from H2LT?
Hair grows slowly, so change is measured in months. Many people first notice less hair on the pillow or in the shower, and later see finer hairs thickening. Full assessment usually happens around the six-month mark with comparison photographs. Individual results vary, and some people mainly see their thinning stabilise rather than reverse.
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