Top Korean Vitamin C Serums Every Seller Should Stock

Fans of the 10-step Korean skincare routine are likely already aware of the term “glass skin.” This K-beauty term refers to a smooth, translucent, and glowing complexion that looks like glass. 

Serums, or treatments, as they’re sometimes called, are crucial in achieving this kind of complexion. While there are many types of serums on the market, with varying active ingredients, among the most popular are those that contain Vitamin C. 

For store owners wishing to provide their customers with the best in Korean skincare, it’s essential to stock Vitamin C serums. These highly coveted products have been proven to deliver visible and lasting results. With Korean brands pioneering stabilized Vitamin C formulas and unique ingredient combinations, your customers will be excited to find these innovative and effective products in your store.

Read below for our curated list of Vitamin C serums you should stock in your shop. 

Top 6 Must-have Korean Vitamin C Serums

Vitamin C is an open secret in the Korean skincare community. Its anti-aging, skin-brightening benefits are well known and backed by science, with studies showing how topical Vitamin C products can:

  • Minimize the appearance of wrinkles
  • Lighten dark spots
  • Improve overall skin texture and appearance
  • Control sebum production 
  • And more


For individuals whose primary skin concerns include uneven skin tone and signs of skin aging, Vitamin C in Korean skincare products are an excellent choice. Regularly using the right products allows your customers to achieve the glass-like complexion they dream of. 

Numbuzin No.5 Vitamin Concentrated Serum

A Vitamin C serum that Korean skincare fans worldwide swear by, Numbuzin No. 5 Vitamin Concentrated Serum is a cult favorite and one of the brand’s top sellers. Also known as “Goodbye Blemish Serum,” this serum gently but effectively targets uneven skin tone, acne marks, and dark spots using Vitamin C along with a blend of other powerful ingredients, including: 

  • Tranexamic Acid – Addresses dark spots and pigmentation; smoothes skin texture 
  • Niacinamide – Calms skin irritation, hydrates, brightens, and reduces the appearance of fine lines and wrinkles
  • Vitamin E – Helps skin absorb and retain moisture; protects skin from pollution and other external stressors 
  • Glutathione – Fades dark spots and brightens complexion
  • 5% Panthenol – Prevents irritation, hydrates skin, and promotes skin barrier repair


TikTok influencers rave about the effectiveness of this product, with some claiming it’s currently “the best” serum with Vitamin C in Korean skincare at the moment. 

COSRX The Vitamin C 23 Serum

COSRX is a trusted name in Korean skincare because of its focus on ingredients with proven results. Their formulations tend to have few ingredients, and they avoid potential irritants like fragrances, making them an excellent choice for individuals with sensitive skin. 

Among its most popular products is The Vitamin C 23 Serum. A well-loved serum with Vitamin C Korean skincare enthusiasts swear by, The Vitamin C 23 Serum packs a lot of skin-brightening power, thanks to 23% pure Vitamin C as well as Super Vitamin E (Tocotrienol). Research suggests that using Vitamin C and E together in a skincare product boosts their effectiveness. These vitamins combined provide broader protection against environmental damage as well as: 

  • Brighten Skin
  • Reduce the Appearance of Wrinkles
  • Improve Skin Elasticity 
  • Stimulate Collagen Production


This Korean Vitamin C serum also contains Hyaluronic Acid for hydration and Allantoin to soothe irritated skin. 

Some By Mi Galactomyces Pure Vitamin C Glow Serum

Famous for its 30 Days Miracle line, Some By Mi is a Korean skincare and cosmetics brand that offers several lines addressing different concerns, from dull skin and acne to wrinkles and dark spots. Like many other top Korean beauty brands, Some By Mi uses unique ingredients in its formulations. 

One example is its Galactomyces Pure Vitamin C Glow Serum, a “double-brightening” Korean Vitamin C serum that contains 75% germinated Galactomyces and 30,000 ppm of pure Vitamin C. Galactomyces is a fermented yeast that repairs and protects against skin damage, minimizes the appearance of pores, fades dark spots, and slows down signs of skin aging like fine lines. 

According to Some By Mi, this Korean Vitamin C serum has undergone six clinical trials. The results demonstrate that this product is effective at improving skin elasticity and skin tone as well as moisturizing and preventing irritation. It is best for individuals with dull, dry or sagging skin and those with melasma or hyperpigmentation spots. 

Purito SEOUL Pure Vitamin C Serum

Ideal for those with sensitive skin, Purito SEOUL Pure Vitamin C Serum has been tested and confirmed as hypoallergenic. It contains no irritating ingredients or fragrances, and it can be used day or night. 

However, despite being gentle, this Vitamin C serum packs a powerful punch. Its core ingredients include 5% Vitamin C, which helps fade hyperpigmentation from sun damage and firms skin, as well as: 

  • Bamboo Water: Helps keep skin supple and soothes damaged skin
  • Sodium Hyaluronate: Hydrates skin and calms inflammation
  • Adenosine: Smoothens skin and reduces the appearance of fine lines

The Ordinary Vitamin C Suspension 23% + HA Spheres 2%

The Ordinary is another popular Korean skincare brand known for its effective skincare products with science-backed ingredients. Many of their offerings focus on one or two ingredients at high concentrations, allowing for more targeted treatment. 

The Ordinary Vitamin C Suspension 23% + HA Spheres 2% features a unique, waterless formulation. Because there is no water, its primary ingredient, 23% pure L-Ascorbic Acid, remains completely stable. This means it won’t break down and become ineffective if exposed to air. 

The Vitamin C in this product is suspended in spheres of Hyaluronic Acid (HA). This additional ingredient boosts moisture content in the skin and also has skin-smoothing properties. 

Dr. Althea Vitamin C Boosting Serum

Like Numbuzin No.5 Vitamin Concentrated Serum, this serum is highly popular among skincare influencers on TikTok, and for many good reasons. Dr. Althea Vitamin C Boosting Serum boasts five-star reviews across the Internet, thanks to the effectiveness of its formulation. 

This serum, which is meant to be used daily, is made up of 20% Vita Boosting Complex, which contains Hyppophae Rhamnoides Fruit Extract. It contains over three times more Vitamin C than lemons.

Additionally, the Vita Boosting Complex contains nine different vitamins. The serum also boasts 45,000 ppm of skin brightening ingredients to improve the appearance of skin blemishes and prevent the formation of dark spots.

Discover the Best of Korean Skincare: Vitamin C Serums and More

For authentic products from Korean’s top skincare brands, turn to UMMA. We are a beauty and cosmetics wholesale supply e-commerce service that distributes top-selling products from over 120 brands, including The Ordinary, Dr. Althea, COSRX, and Numbuzin. 

We source our products directly from these brands and their authorized vendors in Korea, so you can be confident in their authenticity and quality. Our approach allows us to provide competitive prices, giving our members the best value for their money.  

Learn more about UMMA and explore our products today. 

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