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EQQUALBERRY EQQUALBERRY Vitamin Illuminating Serum — Korean skincare product photo
EQQUALBERRY

EQQUALBERRY Vitamin Illuminating Serum

Quick verdict

  • Best for:Dehydrated, dull skin that wants hydration plus gentle tone care
  • Skip if:You want a high-percentage pure vitamin C serum or have reactive skin
  • Key ingredient:40% acerola fruit water + niacinamide 4%
See ratings on Amazon· Check the current price on Amazon

A lightweight brightening serum formulated with 40% acerola fruit water, 4% niacinamide, 2% arbutin, tranexamic acid, ceramides, and multiple forms of hyaluronic acid to support hydration and a more even-looking complexion.

Our verdict

EQQUALBERRY Vitamin Illuminating Serum is designed for users concerned about dullness, uneven tone, visible dark spots, and dehydration. Amazon reviewers commonly praise the serum for leaving skin looking smoother, more radiant, and well hydrated. Many users also like its lightweight feel and report that it layers comfortably under moisturizer and makeup. However, the overall rating is slightly lower than some competing Korean brightening serums, and feedback on texture and sensitivity is mixed. Some reviewers describe it as non-greasy and comfortable, while others find it sticky or report burning and irritation. Despite the product's "vitamin" positioning, the formula is not centered on a high percentage of pure ascorbic acid. Its brightening approach relies more heavily on acerola water, 4% niacinamide, 2% arbutin, tranexamic acid, glutathione, and ferulic acid.

What stands out

  • 40% Acerola Fruit Water — Used as the formula's primary antioxidant-rich base
  • 4% Niacinamide — Helps improve the appearance of dullness and uneven skin tone
  • 2% Arbutin — Supports gradual care for visible discoloration and post-blemish marks
  • Multi-Ingredient Tone Care — Includes tranexamic acid, glutathione, and ferulic acid
  • Eight Forms of Hyaluronic Acid — Provide layered hydration and help reduce dryness
  • Five-Ceramide Complex — Supports moisture retention and the skin barrier

Key ingredients

  • Acerola Fruit Water 40%
  • Niacinamide 4%
  • Arbutin 2%
  • Tranexamic Acid
  • Glutathione
  • Ferulic Acid
  • Panthenol
  • Five types of ceramides
  • Eight forms of hyaluronic acid
  • 3-O-Ethyl Ascorbic Acid

How to use

After cleansing and toning, apply one to two drops evenly over the face. Gently pat until absorbed, then follow with moisturizer. Use once or twice daily according to your skin's tolerance. When used in the morning, finish with broad-spectrum sunscreen. Consistent sun protection is essential when targeting visible dark spots and uneven tone. Patch-test before regular use, especially if you have sensitive skin or already use exfoliating acids, retinoids, or other concentrated brightening products. The brand recommends applying it after cleansing and toner and gently patting it into the skin.

Pros & Cons

Pros

  • Antioxidant-rich acerola water as the formula's base
  • Multi-ingredient tone care: niacinamide, arbutin, tranexamic acid, glutathione
  • Eight forms of hyaluronic acid for layered hydration
  • Five-ceramide complex supports the moisture barrier

Cons

  • Lower rating than several competing Korean brightening serums
  • Some reviewers report stickiness, burning or irritation
  • Not a high-strength ascorbic-acid serum despite the 'vitamin' name

Frequently asked questions

Is the EQQUALBERRY Vitamin Illuminating Serum a vitamin C serum?

Not in the traditional sense. Despite the name, the formula is built on 40% acerola fruit water with 4% niacinamide, 2% arbutin and tranexamic acid, plus only a small amount of a vitamin C derivative. Its brightening approach is multi-ingredient rather than high-dose ascorbic acid.

Is it good for sensitive skin?

It contains many actives and botanicals, and some reviewers report burning or irritation. Patch-test before regular use, especially if you already use exfoliating acids or retinoids.

Can I use it with retinol?

There are no direct conflicts, but stacking a multi-active brightening serum with retinol can be irritating for some skin. Try the serum in the morning and retinol at night, and combine only once your skin tolerates both separately.

Is it fungal-acne safe?

We cannot confirm fungal-acne safety from the published ingredient highlights alone. If you manage malassezia-prone skin, check the full ingredient list on the packaging against a fungal-acne database before buying.

Who should buy it

  • Your skin is dehydrated and dull rather than deeply pigmented
  • You want hydration and gentle tone care in one step
  • You like a multi-ingredient K-beauty formula

Who should skip it

  • You want a proven high-strength vitamin C treatment
  • Your skin reacts to multi-active serums
  • You are targeting stubborn melasma specifically

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The official ingredient list confirms 400,000 ppm acerola fruit water, 40,000 ppm niacinamide, arbutin, tranexamic acid, ceramides, multiple forms of hyaluronic acid, and a small amount of a vitamin C derivative. Price and rating information may change. Check Amazon for the latest details.

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