TOSOWOONG Glutathione Serum 20,000ppm – 30ml Brightening & Hydrating Serum with Niacinamide & Hyaluronic Acid

TOSOWOONG Glutathione Serum is a concentrated Korean skincare serum with 20,000ppm glutathione, niacinamide, and hyaluronic acid designed to brighten, hydrate, and support plumper-looking skin.

This lightweight 30ml serum blends high-purity glutathione with niacinamide and hyaluronic acid to target dullness, uneven tone, and surface dehydration. Formulated with a reported 99% glutathione purity, the serum aims to deliver a visibly refreshed complexion when used consistently as part of a daily regimen. The texture absorbs quickly, layering well under sunscreens and moisturizers, and the packaging suits routine morning or evening application.

How will this serum affect my skin’s brightness and tone?

The combination of glutathione and niacinamide helps address uneven tone and surface discoloration from daily exposure. Regular use can support a more uniform-looking complexion while niacinamide assists skin barrier function for a clearer, balanced appearance.

• 20,000ppm glutathione for high-concentration brightening support
• Niacinamide for tone-evening and barrier resiliency
• Lightweight formula that layers with other products

Will this serum help with hydration and fine lines?

Hyaluronic acid in the formula attracts and holds moisture at the skin’s surface, which can improve skin plumpness and reduce the look of fine lines. Used under a moisturizer, it contributes immediate-surface hydration and a smoother-looking texture.

• Hyaluronic acid for immediate hydration and smoother texture
• Supports reduced visibility of fine lines from improved moisture retention
• Absorbs quickly without heaviness or greasy residue

How should I incorporate this serum into my routine?

Apply a few drops to clean, dry skin after cleansing and toning, then follow with sunscreen in the morning or a moisturizer at night. Start every new active ingredient gradually—use every other day at first to monitor tolerance, then increase to daily use as your skin acclimates.

• Use after cleansing and toning, before moisturizer or sunscreen
• Patch test new serums and introduce slowly if you have sensitive skin
• Consistent daily use shows best visible results over weeks

Are there any compatibility or safety notes I should know?

This serum pairs well with most staples such as gentle cleansers, hydrators, and mineral or chemical sunscreens; avoid layering with multiple high-strength actives simultaneously to reduce irritation risk. If you use prescription topical treatments or have known sensitivities, consult a dermatologist before adding new concentrated actives.

• Avoid concurrent use with other potent exfoliants or actives without guidance
• Patch test behind the ear or inner forearm before full-face use
• Discontinue if persistent irritation occurs and seek professional advice

Who is this for? TOSOWOONG Glutathione Serum is suited to anyone seeking a brightening booster that also delivers hydration and helps improve skin texture—ideal for people with dullness, early signs of surface aging, or those looking to strengthen their daily skincare routine. It is appropriate for normal to combination skin types and can be trialed by sensitive skin users with a cautious introduction. Always use sunscreen during the day when using active brightening ingredients.

Ingredients

Niacinamide, Glutathione, Adenosine, Glycerin, Coconut Oil, Hyaluronic Acid