FAQ

Everything you need to know about lip pigmentation and the corrective protocol

Lip pigmentation: understanding the causes

Dark lips are caused by an overproduction of melanin in the lip tissue. Unlike facial skin (which has around 16 cell layers), the lip mucosa is only 3 to 5 cell layers thick and has none of the natural defenses that regular skin has: oil glands, pores, the ability to sweat. This makes it far more vulnerable to damage.

The most common triggers include sun exposure (UV), smoking, hormonal changes, certain medications, and irritating products applied to the lips. Be cautious with abrasive methods often recommended online (sugar scrubs, toothbrush exfoliation): they create micro-tears that trigger reactive hyperpigmentation and make the problem worse, not better.

Learn more about the biology behind dark lips.

Sources: Silpa-archa N, Kohli I, Chaowattanapanit S, Lim HW, Hamzavi I. J Am Acad Dermatol. 2017;77(4):591-605 ; Axéll T, Hedin CA. Scand J Dent Res. 1982;90(6):434-442 ; Wu H, Koch K. DermNet, 2023

No, and this is one of the most widespread mistakes. Sugar crystals create micro-tears in the lip mucosa, and toothbrush bristles are far too harsh for tissue this thin (3 to 5 cell layers). The result is inflammation that triggers a defense response: melanocytes (pigment-producing cells) generate more melanin to protect the injured area. This is called post-inflammatory hyperpigmentation.

Lips may feel smoother for a few hours, but they gradually darken over the following days. When the method is stopped, the pigmentation rebound can be more pronounced than the original state. To exfoliate lips safely, you need enzymatic exfoliation that dissolves dead cells without mechanical aggression.

Sources: Silpa-archa N, Kohli I, Chaowattanapanit S, Lim HW, Hamzavi I. J Am Acad Dermatol. 2017;77(4):591-605 ; Lawrence E, Syed HA, Al Aboud KM. Postinflammatory Hyperpigmentation. StatPearls, NCBI, 2024

A balm works on pigmentation when it delivers dosed active ingredients that slow down tyrosinase, the enzyme that produces melanin. This is what gradually evens out lip color.

The texture matters too: it nourishes and protects the lip barrier, so the actives stay in contact with the skin and the result lasts over time. This is the role of the Lip Balm Corrector, used continuously in every protocol.

The range's results were measured with LIPS-ID® on 23 people, phototypes I to VI, over 56 days, and supplemented by spectrophotometer measurements.

Sources: Saeedi M et al. Biomed Pharmacother. 2019;110:582-593 ; Yokota T et al. Pigment Cell Res. 1998;11(6):355-361

Yes. Lip hyperpigmentation occurs across all six Fitzpatrick skin phototypes, from the lightest to the darkest complexions. Its appearance varies: localized spots, brownish patches, purplish undertones, or an overall darkening across the lip surface.

Melanin concentration in the lips is a natural biological variable that is not limited to any specific skin tone. Learn more about the causes of dark lips.

Sources: Fitzpatrick TB. Arch Dermatol. 1988;124(6):869-871 ; Davis EC, Callender VD. J Clin Aesthet Dermatol. 2010

In the vast majority of cases, dark spots on the lips are benign. The most common causes are sun exposure, post-inflammatory hyperpigmentation, smoking, or conditions like labial melanotic macule (a localized melanin spot, similar to a freckle).

However, any lesion that changes in size, shape, or color over time should be evaluated by a dermatologist to rule out other conditions.

Sources: Cinotti E et al. J Eur Acad Dermatol Venereol. 2018 ; Duffill M. DermNet, 2008

Smoking-related lip pigmentation, called smoker's melanosis, is caused by nicotine and other chemicals found in smoke that directly stimulate melanocytes in the lip tissue. This type of pigmentation is among the most responsive to corrective care once the source of irritation is reduced or stopped.

A consistent corrective protocol focused on cell renewal and melanin regulation can progressively restore a more even lip tone. You should generally expect at least one 28-day cycle, corresponding to a complete cell renewal of the mucosa, before seeing the first visible results.

Sources: Hedin CA, Pindborg JJ, Axéll T. J Oral Pathol Med. 1993 ; Axéll T, Hedin CA. Scand J Dent Res. 1982;90(6):434-442

Yes. When a lip blush or lip tattoo procedure triggers a tissue reaction, the result can be post-inflammatory hyperpigmentation. This risk is directly linked to the thinness of the lip mucosa (only 3 to 5 cell layers), which makes it highly reactive to needle trauma.

The affected area may appear darker or uneven once the tattoo pigment fades. A targeted corrective protocol can support cell renewal to gradually even out the lip tone. Read our full guide on lip blush gone wrong.

Sources: De Cuyper C. Clin Dermatol. 2008 ; Beylot C, Raimbault C. Ann Dermatol Venereol. 2018

Lip preparation for makeup starts with the condition of the mucosa itself. Dehydrated lips, peeling skin, or a compromised protective barrier will produce an uneven result regardless of which lipstick you use. Makeup adheres poorly to a rough surface and bleeds into fine lines.

An effective prep routine includes gentle exfoliation (enzymatic, never abrasive), followed by care that hydrates lastingly rather than simply sitting on the surface. It is the health of the lip tissue that determines how well makeup holds and how it looks. Read our guide on lip prep before lipstick.

Lip care: myths and facts

Yes. The lip mucosa produces almost no protective melanin and lacks the thick protective outer layer that the rest of your face has. This makes lips more vulnerable to UV damage than the surrounding skin. Repeated sun exposure is one of the leading causes of dark spots and premature aging on the lips. Over time, it can also contribute to conditions like actinic cheilitis (a precancerous lip condition caused by sun exposure).

Lip SPF should be part of your daily routine, just like facial sunscreen, especially during summer and at high altitudes.

Sources: Woo TM. J Dermatol Nurses Assoc. 2020 ; American Academy of Dermatology, How to fade dark spots in darker skin tones

Coconut oil and shea butter are good emollients: they soften and protect the lip surface. But they have zero effect on melanin. No oil or butter, however natural, can inhibit tyrosinase (the enzyme that produces pigment) or speed up the renewal of pigmented cells.

These ingredients can be part of a maintenance routine, but they are not a corrective treatment. The distinction matters: maintaining healthy lips and correcting established hyperpigmentation are two different things that require different approaches.
Ingredients with documented efficacy on melanin regulation include tranexamic acid and kojic dipalmitate, which limit pigment production, certain biomimetic peptides that help cells communicate with each other, and hyaluronic acid for hydration. The effectiveness of these ingredients depends on their concentration and on a formulation specifically designed for the lip mucosa.

An ingredient that works on facial skin is not necessarily effective on lips: the lip mucosa has a different structure, thickness, and permeability.

Sources: Maeda K, Naganuma M. J Photochem Photobiol B. 1998;47:136-141 ; Saeedi M et al. Biomed Pharmacother. 2019;110:582-593 ; Kobayashi H, Tagami H. Br J Dermatol. 2004;150(3):563-567

No. An SPF lip balm stops pigmentation from getting worse in the sun, but it does not correct pigmentation that is already there. To fade it, you need actives that work on melanin, such as the tranexamic acid and niacinamide in the N°3 Balm. See the N°3 Balm

Sources: Hakozaki T et al. Br J Dermatol. 2002;147(1):20-31 ; Maeda K, Naganuma M. J Photochem Photobiol B. 1998;47:136-141

Lipstick sits on top of your natural lip color: on dark or uneven lips, it does not show the shade you chose. Our care evens out lip color, so your lipstick keeps the color you bought. It also strengthens the lip barrier and helps protect your lips from the hyperpigmentation some make-up products can cause.

LIPS-ID® diagnosis and the protocol

LIPS-ID® is a diagnostic tool that uses your phone or computer camera. After four checks (lighting, distance, closed mouth, stability), it measures the color of your lips against your skin and gives it a score from 1 to 10. This score determines your corrective protocol. The whole analysis is built on the LIPS-ID® classification, published on our site.

The analysis takes about two minutes and requires no download.

Find out your lip pigmentation score and get a personalized recommendation.

Get my personalized lip score

Sources: La Bouche Parfaite. Classification LIPS-ID® de la pigmentation des lèvres. 2026. DOI 10.5281/zenodo.23337546

Start with the LIPS-ID® analysis. Describing your lips remains subjective; LIPS-ID® measures them objectively. The analysis first checks lighting, distance, closed mouth and stability, then measures the lip and cheeks in the CIELAB color space, with a melanin index and an erythema index. In two minutes, you get a score from 1 to 10 that determines your routine: one product, several or all five.

Get my personalized lip score
The complete protocol consists of five products, each designed for a specific step: N°1 Lip Cleanser Corrector (preparation), N°2 Lip Peeling Corrector (cell renewal through enzymatic exfoliation), N°3 Lip Balm Corrector (hydration and pigment regulation), N°4 Lip Stain Corrector (tone correction), N°5 Lip Gloss Corrector (comfort and radiance).

All five products work together, over a complete cycle, to correct the look of lip pigmentation. Discover The Essential 5 kit.
Improved hydration and texture are generally noticeable from the first applications. For visible pigmentation correction and a more even tone, you should expect one 28-day cycle of regular use, corresponding to a complete cell renewal of the lip mucosa. For more marked pigmentation, correction continues for up to 56 days, the length of our study.

The speed and duration of improvement depend on the intensity of your initial pigmentation. This is why LIPS-ID® personalizes your journey based on your starting point. Lightening varies from one mouth to another.

Across a panel of 23 people followed for 56 days, the average LIPS-ID® score went from 8.0 to 1.8. The method and results are published in the LIPS-ID® study.
Yes. The protocol is designed to work across all six Fitzpatrick skin phototypes. LIPS-ID® measures the color of your lips during the diagnosis and adjusts the recommendation to your score. For light, medium or dark lips alike, the protocol targets the melanin regulation process rather than applying a one-size-fits-all approach.
Yes. Each product can be bought and used on its own. Your LIPS-ID® analysis determines your routine based on your score. The result of our study was obtained with the complete routine, in this order: the Cleanser prepares the surface, the Peeling renews cells, the Balm regulates and hydrates, the Stain maintains tone correction, and the Gloss nourishes and protects. The Essential 5 kit brings the five treatments together in full size (12 ml each), for one complete 28-day cycle.
The formulas contain a combination of active ingredients targeted for their efficacy on lip tissue: tranexamic acid and kojic dipalmitate to regulate pigment production, niacinamide to limit its transfer to the surface, biomimetic ceramides to restore the lip barrier, and peptides (Maxilip™, Volulip™) for volume and firmness. Each product in the protocol uses a distinct active complex, formulated for its specific corrective step.

Sources: Maeda K, Naganuma M. J Photochem Photobiol B. 1998;47:136-141 ; Saeedi M et al. Biomed Pharmacother. 2019;110:582-593 ; Hakozaki T et al. Br J Dermatol. 2002;147(1):20-31

The Essential 5 brings together the five treatments of the protocol, in the order in which they are applied. Composed this way, it is offered at 250 €, 65 € less than the treatments chosen one by one. It is this complete routine that was evaluated in our study.

Yes. The N°3 Balm helps repair the lip barrier and fade dark spots at the same time, so it also suits dry or chapped lips. In our 56-day in-use test, tolerance of the routine that includes it was rated excellent by 23 out of 23 participants. See the N°3 Balm

Practical information

Yes. The lip mucosa is one of the most delicate areas of the face, and the formulations are developed with this in mind. The products are tested for tolerance on the lip area and do not contain aggressive irritants. If you have a known allergy to a specific ingredient, please check the full ingredient list on each product page before use.

Every formula was evaluated, in accordance with Regulation (EC) No 1223/2009, by an independent expert, Dr Paul-Benoît Fargier, clinical pharmacologist and toxicologist.

Sources: Regulation (EC) No 1223/2009

The formulas use dermocosmetic-grade ingredients generally considered safe for external use. However, as with any skincare product during pregnancy or breastfeeding, we recommend consulting your healthcare professional before starting a new routine. This is a standard precaution.
We ship worldwide from Bordeaux, France, always with tracking. Delivery times and rates vary by destination and are detailed in our shipping policy.
Every order is dispatched within 2 business days. Delivery then takes 2 to 5 business days in mainland France depending on the region (where it is complimentary), 3 to 8 business days in the European Union and 4 to 15 business days elsewhere, depending on the destination and customs. You receive your tracking number by email as soon as your order ships.
For hygiene reasons, a product that has been unsealed or opened cannot be returned, exchanged or refunded, in accordance with article L221-28 5° of the French Consumer Code. An intact product, still sealed and in its original packaging, can be returned within 14 days of receipt; return shipping is at your expense and the refund is issued once the product has been checked. If an item arrives damaged or not as ordered, contact us with a photo of the parcel and we will replace or refund it. Full details are in our return policy.
Through our contact form. We reply within 24 to 48 hours (business days). For a question about your LIPS-ID® results or a product recommendation, include your score in your message so our first reply can be personalized.

Yes. Each formula pairs its corrective actives with ingredients chosen for lip comfort. Mango butter (N°1, N°3, N°5) and shea butter (N°2, N°5) nourish. Glycerin (N°2, N°3) helps hold in water, and jojoba oil keeps lips supple. Ceramides (N°3, N°5) strengthen the lip barrier, and vitamin E is in all five products. The N°3 Lip Balm Corrector brings together mango butter, glycerin and ceramides: it is used throughout the day and, applied generously at night, as a night mask for very dry lips.

Our care is made in France, in small runs. When a new run is being prepared, the Pre-order button appears on the product page: your order is recorded and ships from the date shown under the button.

Yes. The Essential 5 works at each stage of lip pigmentation: it detoxifies, prepares, then corrects. Results vary from one person to another, depending on the cause of the pigmentation and the starting point. To know which products to use and in what order, refer to your LIPS-ID® protocol.

La Bouche Parfaite

The biometric protocol for radiant, even-toned lips