Derived from the amino acid lysine, tranexamic acid is a synthetic ingredient that works by interrupting at least two separate pathways in the skin responsible for discoloration, whether that's dark spots or brown and gray patches, which is why it's considered a suitable option for melasma prone skin. It also works within skin's surface layers to lessen its vulnerability to UV exposure, which supports a more youthful look over time, and it may help calm certain types of sensitivity related redness as well.
One formulation note: because tranexamic acid is water soluble, it penetrates skin best when paired with an oil soluble ingredient, like tocopherol or a plant oil, that can help carry it in.
Tranexamic Acid References
Journal of Cosmetic Dermatology, February 2021, pages 561-565 | International Journal of Medical Sciences, March 2020, pages 903-911 | Journal of Cosmetic Dermatology, April 2019, pages 563-567 | Journal of Cutaneous and Aesthetic Surgery, January-March 2019, pages 63-67; and July-August 2013, pages 139-143 | BioMed Research International, November 2018, ePublication | Dermatologic Surgery, June 2018, pages 814-825 | Dermatology and Therapy, September 2017, pages 417-424 | Journal of Research in Medical Sciences, August 2014, pages 753-757
Our team reviews ingredient research and uses up-to-date evidence to rate ingredients based on the categories below.
Best
Ingredients with the most rigorous and convincing evidence. These are the standouts backed by consistent findings across independent, peer reviewed clinical research.. When we call an ingredient Best, it has earned that distinction through genuine, reproducible proof that it improves skin.
Good
Reliable, well tolerated ingredients that do their job without complaint. They may not carry the headline benefits of a Best rated active, but they hydrate, stabilize a formula, or support the ingredients around them in ways that make a real difference in how a product performs and feels.
Average
Ingredients that are perfectly safe and serve a clear function, typically as an emollient, thickener, or filler, but do not offer any meaningful skin benefit beyond that basic job. Not a red flag, just not a reason to choose one product over another.
Bad/Worst
Ingredients with documented potential to irritate skin, disrupt the barrier, or trigger sensitization in some users, often synthetic fragrance, drying forms of alcohol, or certain essential oils. Not automatically a dealbreaker for every skin type, but worth knowing about before you commit to a product.
