Niacinamide + TXA Serum

10% Niacinamide + 4% Tranexamic Acid + 2% Alpha Arbutin + 1% Zinc PCA

A multi-active serum formulated to improve the appearance of dark spots, uneven skin tone, post-acne marks, enlarged pores, and excess oil using complementary ingredients that target different aspects of pigmentation and skin appearance.

What Makes This Formula Different?

Uneven pigmentation is influenced by multiple biological processes, which is why this formula combines ingredients with different functions rather than relying on a single brightening active.

This formula contains:

• 10% Niacinamide — a multifunctional form of Vitamin B3 studied for pigmentation, barrier function, skin texture, and oiliness
• 4% Tranexamic Acid (TXA) — an ingredient studied for its effects on pigmentation-related signaling pathways, with particularly notable research involving melasma
• 2% Alpha Arbutin — a cosmetic brightening ingredient used to influence tyrosinase activity, an enzyme involved in melanin synthesis
• 1% Zinc PCA — combines zinc with PCA and is commonly used in formulas designed for oily and blemish-prone skin

Fragrance-free. Oil-free. No artificial colorants.

How Does This Serum Work?

The ingredients in this formula address uneven skin tone through complementary pathways.

Niacinamide has been studied for its ability to influence the transfer of melanosomes—the structures containing pigment—from melanocytes to surrounding skin cells.

Tranexamic Acid acts through different pigmentation-related pathways, including processes involving plasminogen and plasmin signaling.

Alpha Arbutin is used for its effects on tyrosinase, an enzyme involved in melanin synthesis.

Together, the formula is designed to help:

• Improve the appearance of dark spots and uneven tone
• Reduce the appearance of post-acne discoloration
• Visibly brighten dull skin
• Improve the appearance of enlarged pores
• Help manage excess oil and shine

Who Is It For?

This serum is designed for concerns including:

• Dark spots and uneven pigmentation
• Post-acne marks
• Dull or uneven skin tone
• Enlarged pores
• Excess oil and shine
• Combination or blemish-prone skin

The lightweight formula can be incorporated into routines for a wide range of skin types.

Why Combine Multiple Pigmentation Pathways?

Dark spots aren't controlled by a single biological process.

Melanin production, pigment transfer, inflammation, UV exposure, and cellular signaling can all influence visible pigmentation.

Niacinamide, Tranexamic Acid, and Alpha Arbutin have different roles within pigmentation-related pathways. Combining them allows the formula to approach uneven tone through multiple complementary mechanisms rather than simply increasing the concentration of one ingredient.

More ingredients do not automatically mean better results, however. Concentration, formulation, stability, tolerability, sun protection, and consistent use all matter.

How to Use

Apply 2–3 drops to clean, dry skin once or twice daily.

Follow with moisturizer as needed.

For daytime use, follow with broad-spectrum sunscreen. Sun protection is particularly important when addressing dark spots and uneven pigmentation.

When Will I See Results?

Changes in pigmentation develop gradually.

Clinical research involving individual ingredients such as niacinamide and topical tranexamic acid generally evaluates visible pigmentation changes over several weeks to several months, rather than days.

Individual results vary depending on the type and depth of pigmentation, sun exposure, skin characteristics, formulation, and consistency of use.

Frequently Asked Questions

Why does this formula contain 10% Niacinamide?

Niacinamide is a multifunctional ingredient with research involving pigmentation, barrier function, skin texture, and other aspects of skin appearance. Higher concentration should not automatically be interpreted as greater efficacy; the finished formulation and overall combination of ingredients matter.

What does Tranexamic Acid do for dark spots?

Topical Tranexamic Acid has been studied for uneven pigmentation, particularly melasma. Its activity involves pigmentation-related signaling pathways that differ from those targeted by Niacinamide and Alpha Arbutin.

Why combine Niacinamide, TXA, and Alpha Arbutin?

The three ingredients influence different aspects of pigmentation biology. Combining them provides a multi-pathway formulation approach rather than relying on a single brightening ingredient.

Can I use this serum with Vitamin C?

Yes. Niacinamide and Vitamin C can both be incorporated into the same skincare routine. Whether you use them together or at different times depends primarily on the individual formulations and your skin's tolerance.

Can I use this every day?

Yes, if well tolerated. The serum can be used once or twice daily. If you're introducing several active products at the same time, beginning once daily can make it easier to evaluate your skin's response.

Why Dr. Brenner Labs

Our approach is simple:

• Evidence-backed active ingredients
• Meaningful concentrations
• Purposeful formulations
• Transparent ingredient information
• Responsible skincare claims

We focus on formulation choices grounded in skincare science rather than marketing trends.

Related Research

Niacinamide for Dark Spots: What Does the Research Show? →

Tranexamic Acid for Skin: What Does the Research Show for Dark Spots? →

Alpha-Arbutin for Dark Spots: What Does the Research Actually Show? →

Ingredients

Deionized Water, Niacinamide, Tranexamic Acid, Glycerin, Propanediol (1,3), Dimethyl Isosorbide, Alpha Arbutin, Polyacrylate Crosspolymer-6, Zinc PCA, Methylcobalamin (Vitamin B12), Phenoxyethanol, Ethylhexylglycerin.