Koji White Underarm Serum for Dark Spots — 1 fl oz, Kojic + Niacinamide Brightening, Fast-Absorbing Hydration

Koji White Underarm Serum is a lightweight, fast-absorbing treatment formulated with kojic acid, niacinamide, and tranexamic acid to improve the appearance of underarm, elbow, knee, and intimate-area skin while keeping it hydrated and non-sticky.

This fragrance-free serum targets areas prone to darkening and roughness by combining proven brightening agents with hydrating and skin-strengthening ingredients. Designed for everyday use after cleansing, it supports smoother texture, reduced appearance of marks, and a balanced underarm environment thanks to prebiotics. The formula is vegan, paraben-free, and made to absorb quickly so it layers easily under deodorant or clothing without tackiness.

How does this serum address underarm marks and discoloration?

The serum blends kojic acid, tranexamic acid, and niacinamide to help even tone and reduce the look of darkened areas. Kojic and tranexamic acids target pigment pathways while niacinamide assists with barrier repair and overall brightness. Regular, consistent application on cleansed skin helps maintain results over time.

• Kojic acid: works on pigment production to help lighten areas.
• Tranexamic acid: helps minimize discoloration from irritation and shaving.
• Niacinamide: supports hydration and strengthens skin barrier.
• Prebiotics: help support a healthier underarm microbiome and odor balance.

Will the serum feel greasy or interfere with deodorant?

Koji White Underarm Serum is formulated to be fast-absorbing and non-sticky, making it suitable for layering under deodorant. Its lightweight texture dries quickly so it won't leave residue that affects clothing or antiperspirant performance. For best results, apply to damp, freshly cleaned skin and allow a short moment to absorb before dressing.

• Fragrance-free, minimizing conflicts with scented deodorants.
• Light texture absorbs rapidly without tackiness.
• Works well when used immediately after showering.

How should I use this serum in my routine for safe, effective results?

Use the serum on clean, damp skin to maximize absorption—massage gently until fully absorbed. Apply once daily or as directed by a skincare professional, focusing on underarms, elbows, knees, or other areas of concern. Consistency and sun protection on exposed areas will help preserve improvements.

• Step 1: Cleanse and pat skin slightly damp.
• Step 2: Apply a small amount and massage until absorbed.
• Step 3: Follow with deodorant if desired, or other topical care.
• Step 4: Use daily; consult a professional for sensitive or reactive skin.

Is this product safe for sensitive areas and daily use?

The formulation avoids alcohol, phthalates, and parabens and is fragrance-free, making it suitable for many sensitive zones. It’s vegan and cruelty-free, but as with any active-containing product, patch testing is recommended for those with very reactive skin. Stop use and consult a professional if irritation occurs.

• Free from parabens, alcohol, and phthalates to reduce irritation risk.
• Vegan and not tested on animals.
• Patch test recommended for very sensitive or compromised skin.

Who is this for: Koji White Underarm Serum is aimed at people who want a non-greasy, targeted treatment for darkened or rough underarms, elbows, knees, and intimate areas. It suits those seeking a fragrance-free, fast-absorbing product that layers under deodorant and supports overall underarm health with prebiotics. Ideal for individuals bothered by post-shave discoloration, friction-induced dullness, or anyone looking to smooth and hydrate delicate, frequently exposed skin without harsh additives.

Ingredients

Water (Aqua), Niacinamide, Butylene Glycol, Glycereth-26, Tranexamic Acid, Phenoxyethanol, Potassium Methoxysalicylate, Carbomer, Alpha-Glucan Oligosaccharide, Chlorphenesin, Ethoxydiglycol, Tetrasodium EDTA, Glycerin, Sodium Lactate, Methylpropanediol, Kojic Acid, Lens Esculenta (Lentil) Seed Extract, Enantia Chlorantha Bark Extract, Saccharomyces/Persimmon Fruit Juice Ferment Extract, Ananas Sativus (Pineapple) Fruit Extract, Carica Papaya (Papaya) Fruit Extract, Mangifera Indica (Mango) Fruit Extract, Silanediol Salicylate, Ethylhexylglycerin, Oleanolic Acid