Hyperpigmentation is a common but difficult to treat skin condition that affects all skin types. The already crowded field of skincare keeps growing, and tranexamic acid is one ingredient that promises to treat hyperpigmentation and even out skin tone. Since it arrived in skincare, tranexamic acid has had rave reviews from skincare fans and dermatologists alike. However, is it really a game-changer or just another passing fad? In this article we dive into what tranexamic acid is and how it works on skin. We explore its benefits, limits and risks, how to use it in your routine, and how it stacks up against other hyperpigmentation treatments like hydroquinone.
What is Tranexamic Acid & How Does It Benefit Skin?
Tranexamic acid belongs to a class of drugs known as antifibrinolytics. It was first discovered in 1962 by the Japanese researchers Shosuke and Utako Okamoto. The drug works by stopping the breakdown of blood clots, which reduces excessive bleeding. For this reason, it is commonly used to treat bleeding from surgery, trauma, heavy periods and haemophilia. So you might wonder how it found a calling in treating skin conditions like hyperpigmentation and melasma. Well, like most things in skincare, its skin-lightening effect was an incidental discovery.
The move from the medical field to the beauty industry is a story of scientific serendipity. In the 1970s, dermatologists noticed that patients taking tranexamic acid for bleeding also saw a significant fading of their melasma. This unexpected side effect led to further studies. They eventually showed it was effective for various forms of hyperpigmentation, including melasma and post-inflammatory hyperpigmentation. It has since been adopted into a range of skincare products and is now valued for its ability to fade pigment and brighten the complexion.
How Tranexamic Acid Treats Hyperpigmentation
Tranexamic acid treats hyperpigmentation through a multifocal approach. At its core, it disrupts the pathways that lead to excess melanin, the pigment responsible for skin colour. When skin is exposed to triggers like sunlight or hormonal changes, it ramps up melanin production, which often leads to uneven pigmentation. Tranexamic acid calms this response so that melanin stays within a normal range. Specifically, it inhibits the interaction between melanocytes and keratinocytes, the cells that drive pigment formation. It also reduces the activity of tyrosinase, the enzyme vital for making melanin. It also has anti-inflammatory properties, which help with post-inflammatory hyperpigmentation by limiting the inflammation that can worsen pigment.
Safety & Side Effects
Topical tranexamic acid is generally well tolerated and safe for most people looking to address hyperpigmentation. It is available over the counter in a variety of products. Side effects are usually mild but may include:
- Irritation: Some people experience mild irritation, dryness or redness. It is worth doing a patch test before using it and starting slowly, especially if you have sensitive skin.
- Allergic reactions: Though rare, allergic reactions are possible. Always check the ingredients list and patch test before trying any new skincare.
Although tranexamic acid is safe for most people, there are situations where you should seek advice first. Consult a doctor if you have severe hyperpigmentation, other skin conditions, take medications or have other medical problems. Pregnant or breastfeeding women should avoid it unless advised by a healthcare professional. People with a history of blood clots or clotting problems, or who take blood thinners, should also be cautious. It is worth speaking to your doctor before starting tranexamic acid even in topical form.
Comparison with Other Hyperpigmentation Treatments
Tranexamic acid is a widely available and gentle over-the-counter treatment for hyperpigmentation. However, how does it fare against other well-known options? Here is how it compares with the most effective skin-brightening treatments:
- Hydroquinone: Tranexamic acid and hydroquinone fade pigment through different pathways. Hydroquinone is the most powerful skin-lightening agent and is prescription-only in the UK. It works by inhibiting tyrosinase to reduce melanin. Whilst highly effective against even severe hyperpigmentation, it can cause irritation and carries a risk of rebound hyperpigmentation and ochronosis if misused. Tranexamic acid interferes with the melanocyte-keratinocyte interaction instead, which makes it gentler but less potent, and better suited to sensitive skin and milder pigmentation.
- Arbutin: This naturally derived compound also inhibits tyrosinase, similarly to hydroquinone, but is available over the counter. Arbutin is a gentler, less powerful alternative that suits more sensitive skin and works best on mild to moderate pigmentation in lighter skin tones. Tranexamic acid is a good alternative for those who have not responded well to tyrosinase inhibitors, or who would rather avoid them. It may also be better for post-inflammatory hyperpigmentation or melasma.
- Retinoids: Retinol and prescription retinoids like tretinoin speed up cell turnover and boost collagen, removing the upper layers of skin where the pigmented cells sit. They also reduce the transfer of pigment from melanocytes to skin cells. Tranexamic acid does not affect cell turnover, so it is gentler, though the two work well together. If your skin cannot tolerate retinoids, you can try bakuchiol alongside tranexamic acid instead.
- Kojic acid: Derived from fungi, kojic acid is an over-the-counter ingredient known for its skin-lightening effect. It inhibits tyrosinase to reduce melanin and can prevent new pigmentation, with antioxidant properties on top. Kojic acid acts directly on the key enzyme, whilst tranexamic acid targets the inflammatory pathways behind pigment. Kojic acid may therefore suit general brightening, whilst tranexamic acid is better for inflammatory pigmentation such as melasma and post-acne marks.
- Vitamin C: This powerful antioxidant is famous for brightening. Vitamin C protects against sun-induced damage and pigmentation and boosts collagen. It cannot fade established pigment on its own, but it shields the skin from oxidative stress and lifts radiance, and it combines well with tranexamic acid.
- Niacinamide: Also known as vitamin B3, niacinamide reduces pigment by slowing the transfer of melanin to the skin’s surface, which evens tone over time. It is also anti-inflammatory, so it suits acne-prone or sensitive skin. Tranexamic acid is more effective for deeper, stubborn pigment like melasma, and the two pair well. Niacinamide works at the surface to block melanin transfer and support the skin barrier, whilst tranexamic acid works deeper to reduce melanin overproduction.
- Glutathione: This antioxidant is produced naturally in the body. Glutathione neutralises free radicals, can inhibit melanin and helps even out tone, so it is often used to brighten dull skin and fade mild patches. For specific or stubborn pigmentation, tranexamic acid is likely to be more effective.
How to Use Tranexamic Acid in Your Skincare Routine
Tranexamic acid is easy to use, though a sensible approach helps you get results and avoid problems. Here are our top tips for starting:
- Know your skin: Think about your specific concern (such as melasma or post-acne marks), how severe it is and what you want to achieve. This helps you decide whether it is right for you.
- Build a supportive routine: Use tranexamic acid as part of a gentle routine with a cleanser, moisturiser and sunscreen. Later you can add products like retinoids and vitamin C.
- Choose the right product: Tranexamic acid comes in many formats. It works best in a morning serum or moisturiser. If your skin is very sensitive, try it in a cleanser first. If it is very oily, you might prefer it in a toner or sunscreen.
- Start slow: Use it daily, but you may want to begin with a lower strength and frequency.
- Patch test: Always patch test to rule out a reaction.
- Be consistent: Regular use is essential for visible results.
- Manage expectations: Use it regularly for at least 6 to 8 weeks before you judge the difference, and remember results vary from person to person.
- Ask for help: If your hyperpigmentation is severe or stubborn, you may need to see a skin doctor. The same is true if you have very sensitive skin, other skin conditions or medical problems.
Tranexamic acid is a useful addition to a routine for mild to moderate hyperpigmentation. It is widely available, gentle, and can fade dark spots whilst brightening and evening out the skin. However, results take time and vary from person to person, and it is not right for everyone. If you have stubborn hyperpigmentation, sensitive skin or medical problems, it is always wise to consult a doctor before adding new active ingredients.
At City Skin Clinic, our doctors create personalised prescription treatments to fade hyperpigmentation, even out skin tone and brighten the complexion. Where suitable, we combine actives like tranexamic acid, hydroquinone, tretinoin and azelaic acid into custom treatments designed around your skin. To start your personalised skincare plan, book a virtual video consultation or use our online consultation form. The journey towards great skin starts here.\
This article is intended for general informational purposes only and is not a substitute for medical advice, diagnosis or treatment. Always consult a qualified medical professional with any concerns about your skin or treatment options.
