Ingredients
What does tranexamic acid do for skin?
Tranexamic acid is actually a medicine used to stop bleeding. Once it was found to block some signals that trigger pigmentation, it started being used in skincare, especially for stubborn spots and melasma.
At a glance
- Best for
- Sun spots, dark marks after acne, melasma-prone skin, sensitive skin
- Typical strength
- Usually 2–5% in serums
- When
- Morning and/or evening; with sunscreen in the morning
- Pairs well with
- Niacinamide, alpha arbutin, vitamin C, azelaic acid, sunscreen
- Caution
- No specific restriction; ask your doctor about topical use in pregnancy
What is tranexamic acid?
Tranexamic acid is a synthetic derivative of the amino acid lysine. In medicine it is given by mouth or injection to reduce bleeding. In cosmetics it is used in creams and serums at low strengths and applied to the skin, which is very different from its use as a medicine.
Benefits for skin
Tranexamic acid blocks the plasmin pathway, which is involved when sunlight and inflammation stimulate pigment cells. This reduces melanin production and spots fade over time. Studies of topical use show improvement in redness and pigmentation, especially in melasma. Because it has low irritation potential, it is also a good choice for sensitive skin.
How to use it
Apply the serum to clean skin, then moisturise; if you use it in the morning, finish with sunscreen. Results are usually better when combined with ingredients that act differently, such as niacinamide and alpha arbutin. Use it regularly for at least 8–12 weeks before judging the effect.
Things to watch out for
Topical tranexamic acid is usually well tolerated; dryness or mild irritation is rare. Oral tranexamic acid is a medicine used only under medical supervision because of clotting risk and should not be confused with skin serums. Data on topical use in pregnancy is limited; ask your doctor.
Frequently asked questions
Can you use tranexamic acid with niacinamide?
Yes. Many brightening serums contain both; they work through different pathways and complement each other.
Is tranexamic acid good for melasma?
It is one of the ingredients showing promising results in melasma. Because melasma treatment is long-term, it is best to make a plan with your dermatologist.
Does tranexamic acid affect blood clotting?
Low-strength products applied to skin are not thought to pass into the blood in significant amounts. If you have a clotting disorder or take blood thinners, still check with your doctor.
This page is general information, not medical advice. If you have a skin condition, are pregnant or take regular medication, talk to a dermatologist before starting a new active ingredient.
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