Q switched Nd:YAG laser toning is an established in clinic treatment for melasma, post inflammatory hyperpigmentation and sun induced tanning. It works over a course of sessions rather than in one visit, and it works best alongside topical treatment and daily sun protection.
Intravenous glutathione, widely marketed for skin whitening, sits in a different category. It is not approved by drug regulators anywhere for skin lightening, the evidence supporting the intravenous route is weak, and regulatory authorities have documented serious adverse effects associated with its use for this purpose. Anyone considering it should understand that before booking.
Start by Identifying the Type of Pigmentation
The single most common reason pigmentation treatment fails is that the wrong condition was treated. These are not interchangeable, and a treatment that helps one can worsen another.
Type
How it presents
Typical cause
Responds to
Melasma
Symmetrical brown or greyish patches on cheeks, forehead, upper lip
Hormonal, UV and visible light, genetic predisposition
Topicals, oral therapy, careful low fluence laser, strict photoprotection
Post inflammatory hyperpigmentation
Flat dark marks where acne, injury or a rash healed
Inflammation
Topicals, peels, time. Often resolves gradually
Solar lentigines and sun spots
Well defined brown spots on sun exposed areas
Cumulative UV exposure
Targeted laser, peels
Tanning
Diffuse overall darkening
Recent UV exposure
Photoprotection, mild topicals, resolves over weeks
Periorbital hyperpigmentation
Dark circles
Genetic, vascular, structural, pigmentary or a combination
Depends entirely on cause. Frequently not pigment at all
Freckles
Small light brown macules, often since childhood
Genetic, UV
Laser, though recurrence is common
Melasma deserves a specific caution. It is a chronic, relapsing condition. It is managed rather than cured, and treatments that are too aggressive can make it worse. Any clinic promising permanent clearance of melasma in a fixed number of sessions is describing something the condition does not do.
YAG Laser Toning: What It Is and What It Does
Laser toning uses a Q switched Nd:YAG laser at 1064 nm, delivered at low fluence with a large spot size across multiple passes. The low energy is deliberate. It targets pigment gradually across a course of sessions rather than causing visible injury in a single treatment, which matters in Indian skin where aggressive settings frequently trigger the exact pigmentation they were meant to treat.
What it is used for: melasma, post inflammatory hyperpigmentation, generalised dullness and uneven tone, and tanning. A 532 nm wavelength is used instead for superficial, well defined spots such as solar lentigines.
Typical course: six to ten sessions, spaced weekly to fortnightly, followed by maintenance. Improvement is progressive and usually becomes visible after three to four sessions.
During the session: most patients describe a warm, prickling sensation. Sessions are short and numbing is often unnecessary. Mild redness settles within a few hours.
What it does not do: it does not change your natural skin colour, and it does not permanently remove pigmentation that has an ongoing cause. If the trigger continues, whether that is UV exposure, hormonal factors or untreated acne, the pigmentation returns.
Risks worth knowing: in darker skin types, over treatment can produce paradoxical hyperpigmentation, or small confetti like white spots caused by loss of pigment, which are difficult to reverse. Rebound of melasma after stopping is common. These outcomes are related to technique and settings, which is why operator training matters more than the machine brand.
A properly planned course of laser toning for pigmentation begins with a diagnosis and a test patch, not with a package of sessions sold before assessment.
Glutathione IV Drips: What the Evidence Says
Glutathione is an antioxidant the body produces naturally. The proposed mechanism for skin lightening is that it shifts melanin production from darker eumelanin toward lighter pheomelanin and inhibits tyrosinase, the enzyme central to pigment formation.
Here is where the evidence sits, stated plainly.
Oral and topical glutathione have been studied in small trials, with some showing modest, temporary lightening that reverses after the product is stopped.
Intravenous glutathione for skin lightening lacks robust randomised controlled trial evidence. It is not an approved indication with drug regulators, including in the United States, and it has been the subject of specific public safety advisories.
Documented adverse effects associated with intravenous glutathione used for skin lightening include severe skin reactions such as Stevens Johnson syndrome and toxic epidermal necrolysis, thyroid dysfunction, kidney impairment, abdominal complaints, and infection risk from non sterile administration. The severity of these is not proportionate to a cosmetic benefit that is unproven and, where reported at all, temporary.
Doses used in aesthetic settings frequently exceed those studied in any clinical context, and the products used are not always manufactured to injectable standards.
There is also a broader point worth making. Pigmentation problems such as melasma, dark spots and uneven tone are real dermatological conditions with real treatments. Wanting to be a different colour altogether is a separate matter, and no safe medical intervention delivers it. A clinic that treats the first while declining to sell the second is doing its job correctly.
If uneven tone or dark patches are the actual concern, the treatments in the next section have evidence behind them.
Treatments With Stronger Evidence
Treatment
Best for
Notes
Broad spectrum sunscreen
Every type of pigmentation
Non negotiable. Determines whether anything else works
Tinted sunscreen with iron oxides
Melasma specifically
Blocks visible light, which drives melasma in deeper skin tones. Untinted sunscreen does not
Topical tyrosinase inhibitors
Melasma, PIH, sun spots
Includes hydroquinone, azelaic acid, kojic acid, arbutin, cysteamine. Several are prescription only
Retinoids
Most pigmentation, plus texture
Slow acting, needs gradual introduction
Niacinamide
Adjunct across types
Well tolerated, modest effect on its own
Oral tranexamic acid
Resistant melasma
Prescription only. Requires screening for clotting risk and medical supervision
Chemical peels
PIH, sun spots, dullness
Depth and agent must suit the skin type
Q switched Nd:YAG laser toning
Melasma, PIH, tanning, dullness
Best combined with topicals rather than used alone
Superficial and medium depth chemical peels are frequently combined with laser toning across a treatment course, since they address different layers.
The realistic model to hold in your head: sunscreen and topicals do the sustained work, in clinic procedures accelerate it, and maintenance prevents relapse. Procedures alone, without the other two, produce results that fade.
Realistic Timelines
Concern
First visible change
Meaningful improvement
Maintenance needed
Tanning
2 to 4 weeks
6 to 8 weeks
Sun protection only
Post inflammatory hyperpigmentation
4 to 8 weeks
3 to 6 months
Treat the underlying cause
Solar lentigines
1 to 2 sessions
2 to 4 sessions
Ongoing photoprotection
Melasma
4 to 6 weeks
3 to 6 months
Continuous. Relapse is expected without it
Anyone quoting a shorter timeline than these is either treating something other than what you have, or is not telling you the whole picture.
Why Sunscreen Decides the Outcome
This is the least interesting recommendation in dermatology and the one that determines results more than any device.
Ultraviolet radiation drives pigment production directly. For melasma in Indian skin, visible light also plays a substantial role, which conventional transparent sunscreens do not block. This is why tinted formulations containing iron oxides are specifically recommended for melasma rather than being a cosmetic preference.
Practical points: apply enough, which is roughly a quarter teaspoon for the face; reapply every three to four hours during daytime exposure; and continue indoors near windows, since UVA penetrates glass. A laser course carried out without consistent photoprotection will produce a result that reverses within months.
How to Assess a Clinic Before Booking
Who is performing the procedure, and what are their qualifications? For medical lasers and injectables this should be a qualified doctor, ideally a dermatologist.
Was a diagnosis made before a treatment was recommended? A package quoted before an examination is a sales process, not a clinical one.
Is a test patch offered? Standard practice for laser in deeper skin types.
What are the stated risks? A clinic that mentions none has not told you the whole picture.
Is maintenance discussed openly? Melasma in particular requires it, and clinics that do not raise it are setting up disappointment.
Are results shown with realistic framing? Consistent lighting, stated intervals, no ambiguity about how many sessions were involved.
You can review Dr Srishti's qualifications and clinical background before your consultation.
Frequently Asked Questions
Is YAG laser toning safe for Indian skin?
Yes, when performed at appropriate low fluence settings by a trained practitioner. Deeper skin types carry a higher risk of post inflammatory hyperpigmentation and of paradoxical pigment loss if settings are too aggressive, which is why a test patch and conservative parameters are standard practice.
How many laser toning sessions will I need for pigmentation?
Most courses run six to ten sessions spaced weekly to fortnightly, with maintenance afterwards. The exact number depends on the type of pigmentation, its depth and duration, and how well it responds early in the course.
Does glutathione IV drip whiten skin?
There is no robust clinical trial evidence that intravenous glutathione lightens skin, and it is not an approved treatment for that purpose. Where lightening has been reported with oral or topical forms, the effect is modest and reverses on stopping. Regulatory authorities have issued safety advisories about intravenous use for skin lightening.
Is glutathione IV safe?
Serious adverse effects have been documented in connection with its use for skin lightening, including severe skin reactions, thyroid dysfunction, kidney impairment and infection risk from injection. Because the cosmetic benefit is unproven, the risk to benefit balance does not support its use for this indication.
Can melasma be cured permanently?
No. Melasma is a chronic, relapsing condition that is managed rather than cured. Good management can keep it substantially improved for long periods, but it requires ongoing photoprotection and maintenance treatment.
Will laser toning make my skin fairer than my natural colour?
No. Laser toning treats excess pigment from sun exposure, inflammation or melasma. It restores your own baseline tone rather than changing it. No safe medical treatment changes your constitutional skin colour.
Can I do laser toning if I have active acne?
Active inflammatory acne should generally be controlled first, since treating pigmentation while the cause of it is ongoing produces temporary results. Your dermatologist will sequence the two.
What should I avoid after a laser toning session?
Direct sun exposure, hot water on the treated area for the first day, active exfoliants and retinoids for a few days, and any facial or threading immediately afterwards. Your clinic should give you written aftercare instructions specific to your treatment.
Book an Assessment Before a Treatment
Pigmentation is diagnosable. The type you have determines what will work, and the most expensive treatment is the one aimed at the wrong condition.
If you are unsure what you are dealing with, book a consultation for an assessment and a plan built around your skin type and history rather than around a package.