What does tranexamic acid do for skin?

What does tranexamic acid do in skin?

Melanocytes are cells that make melanin, the pigment that gives skin its color. In excess, melanin can form darker patches. One proposed action of tranexamic acid is to interrupt signals between keratinocytes, the main surface skin cells, and melanocytes. It may also reduce the activity of substances involved in pigment production after ultraviolet exposure. The exact way tranexamic acid acts in skin is not fully understood, so these pathways explain the research rather than guarantee a result for an individual.123

Research also examines anti inflammatory and anti angiogenic effects. Anti angiogenic means limiting the growth of blood vessels. Reviews discuss tranexamic acid for other pigment changes, rosacea and post acne redness, but melasma remains its most studied skin use. The NHS says there is not yet enough evidence to know how well tranexamic acid works as a skin lightening treatment, so a brightening claim is not a settled result for every type of discoloration.14

How is topical tranexamic acid used?

Skin studies use several routes, including topical products, injections into the skin and microneedling. Topical and injected treatments in clinical research commonly use concentrations from 2% to 10%. That range is not one universal amount or morning or evening schedule for a cosmetic serum. Follow the directions for the exact product, and do not use dosing for an oral medicine as instructions for a topical product.1

A review describes a study where topical 5% tranexamic acid sped recovery of a skin barrier damaged in an experiment. That finding is specific to the study conditions; it does not show that every tranexamic acid serum repairs sensitive skin or will feel gentle on it.1

How long does it take to see a difference?

Melasma improvement with tranexamic acid has been reported as early as eight weeks, but that is not a promise for a cosmetic serum. A complete melasma plan often takes three to twelve months to show results, and longer standing melasma can take longer. Pigment can return after treatment stops or after sun exposure, so an early change is not the same as a permanent result. Eight weeks is the earliest reported improvement, not a deadline pigment has agreed to honor.25

What should you pair it with?

For melasma, sun protection is part of treatment, not an optional accessory. Sunlight can increase pigment and darken existing patches. Dermatologists commonly recommend shade, a wide brimmed hat and broad spectrum sunscreen with SPF 30 or higher; tinted sunscreen containing iron oxide can also help protect against visible light. Sunlight can darken melasma and bring it back, which gives sunscreen unusually good job security.35

Is oral tranexamic acid different?

Yes. Oral tranexamic acid is a medicine, and dermatologists may prescribe it for melasma that is difficult to treat. It is not a self directed substitute for a serum. Systemic use can cause stomach upset or menstrual changes, and blood clots are a serious concern. A personal or family history of clotting problems, a previous vein clot, stroke, heart disease, severe kidney disease or seizures calls for medical review before use. Before prescribing it, a dermatologist will ask about your health; tell them if you have had a blood clot.125

For oral tranexamic acid, the combined contraceptive pill does not stop working, but taking both can slightly increase the risk of a blood clot. Discuss the combination with the prescribing clinician.4

Pregnancy and hormone changes can trigger melasma.6

Tranexamic acid for melasma

Melasma causes irregular brown patches, often on sun exposed areas of the face. A dermatologist can distinguish it from other pigment conditions and assess how deeply the pigment sits. More superficial epidermal melasma usually responds better to treatment; deeper dermal melasma often responds poorly, while mixed melasma may improve only partly. For difficult melasma, tranexamic acid may be added to a plan that includes sun protection and other prescribed treatment. If uneven color has not been diagnosed, a dermatologist can check whether it is melasma or another condition before you choose a treatment.35