Low Level Laser Therapy For Hair: Does It Regrow Hair?

Losing hair is more than a physical change, it can affect how you see yourself. People begin with oils, shampoos or supplements but when they see no satisfactory improvement, they switch to more specific options.

Low level laser therapy (LLLT) hair is one of these new treatments. It is a non-invasive, FDA cleared treatment that applies red, or near infrared light, to hair follicles. In contrast to surgical treatments, LLLT is painless, does not require a recovery period and can be performed in the comfort of one’s home. 

By the end of this guide, you will understand what LLLT means, how it works, its advantages, who is most likely to benefit, the side effects, and the best methods to maximize the benefits.

What Is Low Level Laser Therapy Hair?

The Low Level Laser Therapy (LLLT) uses certain red and near infrared light wavelengths at around 650-680 nm into the scalp to reactivate damaged hair follicles. The wavelength in this range effectively reaches the base of the follicles without damaging the adjacent tissue.

How Low Level Laser Therapy Hair Works

LLLT works on the phenomenon of photobiomodulation, the transferring of light energy into cellular energy. On exposure to red light of the appropriate wavelength, the hair follicles are activated to generate more ATP by the mitochondria. 

This increases the energy which helps in activating follicles which are in telogen (resting) phase and triggering them to move towards anagen (growth) stage.

• Light Absorption: The cytochrome c oxidase enzyme within the mitochondria, the powerhouses of our cells, absorbs the photons.
• Energy Boost: This stimulates production of more ATP (adenosine triphosphate) that helps to supply energy to the follicle cells.
• Improved Circulation: LLLT promotes the blood flow to the scalp that enables increased oxygen and nutrients.

In contrast to hair removal lasers which operate using highly intense beams to destroy follicles, LLLT involves specifically low-intensity light that is non-destructive. 

Expected Outcomes of LLLT for Hair Loss

Scientific studies indicate that LLLT can do the following:

• Increase hair density by 20–35% within 16–26 weeks.
• Improve hair shaft thickness.
• Reduce inflammation in the scalp.

The therapy also:

• Improves delivery of oxygen and nutrients to the follicles.
• Increases keratin production, essential for hair strength.
• Restores normal follicle cycling patterns.

It does not work overnight, the average person can see results between 3 to 6 months of regular use. To get the optimal results, use the device following the manufacturer recommendations, most often 3-4 times a week.

What Are The Benefits Of Low-Level Laser Therapy Hair?

LLLT causes a visible improvement in the hair, particularly where there is a thinning at an earlier stage. A Journal of Clinical and Aesthetic Dermatology study found users had 35 percent more hair density in 16 weeks.

• Reduced Hair Shedding: Fewer hairs in the shower drains, brushes and pillows.
• Thicker, Stronger Strands: As time goes by, hair shafts grow stronger.
• Improved Scalp Health: Circulation improves and this promotes the scalp health.
• Increased Number of Active Follicles: The inactive follicles pass into the active phase.
• Fuller Hairline Appearance: In the frontal and crown areas in particular.
• Boosted Confidence: When hairs grow back, self-esteem improves.

Laser Treatment for Hair Growth: What Science Says

The mechanism of hair growth through LLLT is extremely powerful, especially when it comes to androgenetic alopecia. The results of the clinical trials that have been conducted during the past twenty years confirm that low-level red light activates the hair follicles and increases hair density.

Key findings include:

2009 Clinical Trial (HairMax LaserComb) – The participants treated with the device saw an average increase of 19.8 hairs/cm2 at the end of 26 weeks.

2020 NIH Review – LLLT was confirmed to make the hair thicker and reduce shedding of individuals with androgenetic alopecia (men and women).

Telogen Effluvium Studies – Patients using LLLT recovered faster compared to those who did not use it, highlighting its role in stimulating dormant follicles.

Researchers believe the success comes from three main mechanisms:

1. Increased ATP production in follicle cells.
2. Enhanced blood circulation to the scalp.
3. Reduced inflammation and oxidative stress.

Although results differ per person, usage over 12 to 24 weeks is generally necessary before improvements are noted. It is possible that adding LLLT to other treatments such as minoxidil will produce even greater improvements but many individuals experience beneficial changes with LLLT alone.

Who Is An Ideal Candidate For LLLT Hair Regrowth?

LLLT works best for adults with early-stage, non-scarring hair loss.

• Men and women aged 18–55 with androgenetic alopecia.
• Individuals with telogen effluvium after illness, stress, or postpartum recovery.
• People with miniaturized follicles but not complete baldness.
• Those seeking a drug-free, pain-free regrowth solution.
• Users committed to consistent, long-term use.

Studies by the American Academy of Dermatology shows that younger patients and individuals in the first 5 years after hair thinning react well. When hair loss is rapid and severe then a combination of LLLT and other treatments can increase regrowth.

Anecdotal evidence from platforms like Reddit and hair loss forums mirrors scientific findings—users often report:

• Less shedding within 4–8 weeks.
• Fuller crowns and better hair texture by 3–6 months.

Note: Something that LLLT won’t be able to fix is completely bald patches where the follicles are gone or changed to scar tissue. 

To achieve an optimal effect on regrowth, dermatologists will frequently advise to initiate LLLT at the onset of thinning. The sooner it is treated the better.

Who Shouldn’t Use LLLT Hair Treatment?

While LLLT is safe for most people, there are specific cases where it should be avoided or used only under medical supervision.

Avoid use if you have:

• Scalp Infections Or Open Wounds: Light exposure can worsen irritation.
• Scarring Alopecia: Conditions like lupus or lichen planopilaris won’t respond because follicles are permanently damaged.
• Photosensitivity Disorders: Light may trigger adverse reactions.
• Epilepsy: Especially if seizures are light-induced.
• Hormonal Disorders: Such as untreated thyroid disease.
• Skin Cancer Or Recent Chemotherapy: Light stimulation may be unsafe.

How to Use Low Level Laser Therapy

For safe and effective results, follow these steps:

1. Start with a clean, dry scalp – clear oils or fashion products can block the light.
2. Wear the device properly – in an area that covers hair thinning areas.
3. Follow the schedule – Most of the devices recommend 3-4 sessions per week and 15-30 min.
4. Stay consistent for at least 6 months – Terminating too soon will undo progress.
5. Clean the device after each use – Maintain hygiene to prevent scalp irritation.

Low-Level Laser Therapy Hair Side Effects

LLLT is generally well-tolerated, but minor side effects can occur.

• Mild Scalp Redness: Typically fades within hours.
• Tingling Or Itching: Due to increased blood flow.
• Dry Or Flaky Scalp: Often from heat or light exposure.
• Occasional Breakouts: Near hairline in sensitive skin.

To minimize side effects:

• Avoid use on broken or infected skin.
• Do not exceed the manufacturer’s recommended session time.
• Keep scalp clean and free from products that block light.

Pregnant or breast-feeding women, or those with light sensitivity related disorders, should begin only after consulting a physician. When overused or abused, it may lead to temporary shedding ( although very rare) which is an indication of follicles entering a growth phase.

What Factors Will Affect LLLT Hair Regrowth Results?

Not everyone responds equally to LLLT, and several factors influence results.

Factor	Effect on Results
Age	Younger users see faster change
Hair loss stage	Early thinning shows better results
Device choice	Full coverage works better
Consistency	Skipping sessions slows progress
Nutrition	Healthy diet supports growth

Additional tips for success:

• Use the device 3–4 times per week without skipping.
• Have a nutritious diet containing biotin, zinc and iron.
• Deal with stress to contribute to the reduction of shedding.
• Think about using LLLT with topical or oral synergistic effects.

Individuals who stick to a routine tend to notice visible changes in 3 months, with a lot of improvements in 6 months.

Hair Laser Regrowth Timeline

While results vary, most people experience a similar improvement timeline when using LLLT consistently:

Timeframe	What You May See
1 week	Less hair in the drain, brush, or on pillows
1 Month	Hair feels stronger and smoother
3 Months	Noticeable density in the thinning area
6 Months	More growth and fuller appearance

Laser Hair Removal vs Low Level Laser Therapy

Many people confuse LLLT with traditional laser treatments, but their purposes and effects are entirely different.

Feature	Laser Hair Removal	Low-Level Laser Therapy
Goal	Remove hair permanently	Stimulate hair regrowth
Light Intensity	High enough to destroy follicles	Safe low power
Side effects	Higher risk of burns and scarring	Minimal risk
Follicle effect	Destroys follicles	Invigorates follicles

What’s the Cost of LLLT for Hair Loss?

The cost of LLLT also differs tremendously, based on the type of device, the quality of the device, and which of home or clinic treatments you choose.

Device Type	Cost Range
Laser Helmet	$600 – $2,500+
Laser Cap	$500 – $3,000+
Laser Comb	$100 – $350+
Clinic Use	$50 – $200+ per session

Home devices have higher upfront costs but can be more economical over time. Clinics are appealing for professional oversight but can become expensive if you need 2–3 sessions weekly for 6+ months.

Best LLLT Device for Hair Loss: Things To Consider

Choosing the right device can make or break your results. LLLT devices vary in coverage, ease of use, and cost. The most common types are helmets, caps, and combs.

Device Type	FDA Cleared	Coverage	Use
Laser Helmet	Yes	Full scalp	Hands-free
Laser Cap	Yes	Crown	Moderate
Laser Comb	Yes	Small spots	Manual

Tips for choosing:

• Pick an FDA-cleared device for proven safety and efficacy.
• Helmets offer full coverage and convenience and are ideal for multitasking.
• Caps are more compact for travel.
• Combs are great for targeting specific areas but require more effort.

Also check laser diode count and wavelength (ideally 650–680 nm) for optimal results.

Conclusion

Low Level Laser Therapy provides a scientifically proven, non-invasive and drug-free option to hair thinning. LLLT stimulates shrunken follicles by means of directed wavelengths of red light leading to greater blood supply and a thicker, more robust growth of hair.

Results are not a miracle cure, they need consistency, patience and realistic expectations. The ideal candidates are early starters, with an FDA-cleared device, and with healthy lifestyle concomitant with treatment.

How often should you do low level laser therapy hair treatment?

Most devices recommend 3–4 times weekly. Daily use isn’t necessary unless specified.

What is the difference between laser and low level laser therapy?

Laser hair removal destroys follicles but LLLT stimulates them to grow.

What is the success rate of LLLT hair treatment?

Studies report 70–80% of users see visible improvement within 4–6 months.

How long does it take for low-level laser therapy to work?

Mild improvement may appear in 4–8 weeks, with best results by 6 months.

What hair cannot be lasered?

LLLT won’t work on completely bald areas or where follicles are scarred.

Do celebs use LLLT?

Yes, many public figures use laser caps or helmets for hair maintenance.