Vitamin C peel or depigmentation — what actually works on melasma?

Two approaches, two philosophies

A vitamin C peel and dedicated depigmentation aren't two versions of the same treatment. They're two entirely different strategies. A vitamin C peel works mainly at surface level: it exfoliates the stratum corneum, supports antioxidant defence and can lighten fresh, shallow discolouration. Depigmentation targets melanin production directly. It works deeper, at melanocyte level, and often combines several mechanisms of action at once.

When a vitamin C peel makes sense — and when it may not be enough

Vitamin C (L-ascorbic acid) is one of the best-researched brightening ingredients — and for good reason. As a strong antioxidant, it inhibits the enzymatic processes involved in pigment formation, including tyrosinase activity, and can lighten fresh, shallow discolouration. In peel form, it also exfoliates, which speeds up epidermal renewal.

• Fresh, superficial discolouration — epidermal melasma responds better to vitamin C than dermal melasma.
• Prevention and maintenance care — sustaining results after more intensive depigmenting treatments.
• Sensitive, reactive skin — vitamin C can be a gentler first step before moving on to stronger protocols.
• Evening out skin tone — beyond melasma: uneven skin tone, grey, tired-looking skin.

When you need dedicated depigmentation

Dedicated depigmentation is an approach where the treatment — or series of treatments — is deliberately tailored to how melasma forms. It often combines several substances that inhibit melanogenesis (such as kojic acid, azelaic acid, arbutin, niacinamide and retinoids, in various combinations and strengths) with exfoliating acids that aid penetration and speed up the removal of pigment already accumulated.

1. 01

   Assessing the type of melasma

   A Wood's lamp or dermatoscope examination shows whether the hyperpigmentation is epidermal, dermal or mixed. This determines how deep the treatment needs to work and which substances are chosen.

2. 02

   Choosing a depigmenting protocol

   Depigmentation is usually delivered as a series of sessions. Each one can combine a chemical peel with melanogenesis-inhibiting substances. The order and intensity are adjusted to how your skin responds.

3. 03

   Home care as an integral part of the plan

   Without daily SPF — even in winter, even on cloudy days — depigmentation only gets you halfway. Sun, but also heat and hormonal shifts, can reactivate melanocytes within days.

4. 04

   Maintenance and preventing recurrence

   Melasma tends to come back. Depigmentation is rarely a one-off treatment. It's usually a long-term protocol: an intensive series followed by maintenance sessions combined with proper home care.

The melasma paradox: intensity can backfire

This is one of the features that sets melasma apart from other types of hyperpigmentation: too aggressive a treatment can make the problem worse, not better. Melanocytes in melasma are overreactive. Thermal, mechanical or chemical irritation can trigger an inflammatory response that switches on even more intense pigment production. With melasma, it's not just about "what" — it's about "how much" and "how deep".

For the same reason, lasers are used cautiously with melasma. Not all types and settings are safe, and choosing the wrong one can trigger rebound hyperpigmentation. This is another reason melasma calls for consultation with someone who understands the mechanisms behind each method — not just someone offering "treatments for hyperpigmentation".

Vitamin C peel + depigmentation: when combining works best

In practice, the question "vitamin C peel or depigmentation" often isn't a choice between the two. It's a question of what to do now and what to do next. Many protocols combine both: vitamin C as part of home care or maintenance treatments, and depigmentation as the core of the therapeutic series. The logic is simple:

How to work out what you need — a simple guide

The answer to "vitamin C peel or depigmentation" depends on several factors. The questions below can help you get your bearings, though the final assessment should always come from a specialist:

• How long have you had the discolouration? Fresh (under a year), superficial patches tend to respond better to a vitamin C peel. Old discolouration that has persisted for years usually needs dedicated depigmentation.
• Does the discolouration return after summer? If so, you're dealing with hormonally active melasma, or a phototype prone to recurrence. You need a protocol that inhibits melanogenesis, not just exfoliation.
• Have previous treatments — peels, toners — changed anything? No improvement despite long-term care is a sign the problem runs deeper than the epidermis.
• What's your phototype? The darker your skin tone (phototype III+), the more caution is needed with intensive methods — and the more you need a professional assessment before choosing a protocol.