Combining BHA and Tranexamic Acid in Serum for Acne and Melasma

Question

I am interested in creating a serum formulation. Can Salicylic Acid (BHA) and Tranexamic Acid be combined in the same serum? What are the benefits of this combination, particularly for concerns like acne and melasma? Is BHA effective for melasma, or would a combination of Tranexamic Acid with an AHA like Glycolic Acid be more suitable for treating melasma?

Answer 1

Combining BHA and Tranexamic Acid in a Serum

Yes, Salicylic Acid (BHA) and Tranexamic Acid can be combined in a serum formulation. Tranexamic Acid is stable enough to be used in formulations with the lower pH required for BHA to be effective.

Salicylic Acid (BHA) is highly effective for treating acne, particularly clogged pores, as it can penetrate oil and exfoliate inside the pore. It also has mild exfoliating properties on the skin surface.
Tranexamic Acid is known for its ability to brighten skin and is effective in reducing the appearance of melasma and hyperpigmentation by inhibiting melanin production.

Combining these two ingredients can create a serum that targets both acne and hyperpigmentation concerns. You may see results in addressing both issues with this combination.

However, for addressing melasma and overall skin exfoliation more broadly, Alpha Hydroxy Acids (AHAs) like Glycolic Acid are often considered more effective than BHA. Glycolic Acid helps to accelerate skin cell turnover, which can improve skin texture, tone, and the appearance of dark spots.

Therefore, depending on whether your primary concern is clogged pores/acne or melasma/hyperpigmentation, you might also consider a combination of:

Tranexamic Acid + Glycolic Acid (AHA): This combination is often recommended for targeting melasma and providing general exfoliation benefits.

Ultimately, the choice of ingredients depends on the specific skin concerns you wish to address and the desired focus of the serum.

Answer 2

Update 2026-05-24

The original compatibility advice remains valid: Salicylic Acid (BHA) and Tranexamic Acid can be used in the same serum when the finished formula pH is controlled. In the current catalog, Tranexamic Acid (Trans-White™) is suitable around pH 3–8, while Salicylic Acid (BHA, Pharma Grade) is used around pH 3–6.5, so the practical overlap starts at about pH 3.

For purpose selection: use Tranexamic Acid + BHA when the formula targets pigmentation and clogged pores/acne-prone skin. If melasma, dullness, or uneven tone is the main target, Tranexamic Acid + Glycolic Acid/AHA is usually the more relevant exfoliation-support direction, provided the skin can tolerate AHA. Glycolic options such as Glycopure™, Ampho-Glycolic™, or ActiveRelease™ Glycolic Acid can be considered depending on the desired irritation profile.

Important formulation cautions: Salicylic Acid (BHA, Pharma Grade) powder is not directly water-soluble, so it must be properly dissolved/solubilized and the finished serum should be checked for crystal precipitation during stability testing. Avoid combining high levels of AHA and BHA in one leave-on serum unless it is deliberately designed and tested as an exfoliating product. AHA/BHA products can increase irritation and sun sensitivity; patch testing and daily broad-spectrum sunscreen are especially important for pigmentation-focused formulas.

References: Kornhauser et al., Clinical, Cosmetic and Investigational Dermatology, 2010; Del Rosario et al., Journal of the American Academy of Dermatology, 2018.