Skin1004 SKIN1004_ampoule Serum Review
Our verdict
Skin1004's ampoule delivers a brightening vitamin C and niacinamide formula in a generous 100 ml bottle for just $19.99, making it one of the most cost-effective picks in the category for sensitive skin. At 4.5 stars across 862 reviews, it has earned a strong reputation at a price that is hard to argue with.
Check price on AmazonBest for
Sensitive skin looking for an affordable brightening and soothing ampoule with vitamin C and niacinamide in a large-format bottle.
Skip if
You want a premium-brand positioning or a richer cream texture rather than a watery ampoule application.
- Form Capsule
- Skin type Sensitive
- Key ingredients Ascorbic Acid,Niacinamide,Vitamin C
- Targets Brightening,Hydrating,Soothing
- Size 100 Milliliters
- Scent Aloe
Our scorecard
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Owner rating4.5/5
4.5 average across 862 owner ratings
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Popularity3.5/5
862 owner reviews, more than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other anti-aging skincare: serums, night creams, facial peels, wrinkle patches and anti-aging devices we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
['Skin1004 is a Korean skincare brand that has gained attention for transparent formulas at accessible prices. This ampoule comes in capsule form (typically meaning a concentrated serum) and lists ascorbic acid, niacinamide, and vitamin C as its key ingredients, all three of which are among the better-studied actives for supporting a brighter, more even skin tone appearance.', 'The 100 ml size is notably large for an ampoule. Most ampoules and serums in this price range come in 30 ml bottles, so the value per ml here is exceptional. The formula is listed as natural and targets brightening, hydration, and soothing, which lines up with the sensitive skin designation and the aloe-scented base.', 'At $19.99 for 100 ml, the per-ml cost sits well below category averages, and the 862 ratings at 4.5 stars confirm that the budget pricing does not come at the cost of performance. This is a product that appears to have genuinely resonated with K-beauty and sensitive-skin audiences.']
Pros
- Exceptional value at $19.99 for 100 ml, far larger than most serums in this price tier
- 4.5-star average across 862 reviews signals strong, consistent buyer approval
- Vitamin C and niacinamide together support the appearance of brightness and even tone
- Formulated for sensitive skin with a soothing and hydrating focus
- Natural positioning with an aloe-based scent
Cons
- Ascorbic acid and vitamin C listed separately, which may reflect a blend but ingredient overlap is unclear without the full INCI list
- Ampoule or capsule texture may be too watery for buyers expecting a thicker serum feel
- Low monthly buyer volume relative to review count suggests slower current demand
Specifications
- Form
- Capsule
- Skin type
- Sensitive
- Key ingredients
- Ascorbic Acid,Niacinamide,Vitamin C
- Targets
- Brightening,Hydrating,Soothing
- Size
- 100 Milliliters
- Scent
- Aloe
- Features
- Natural
Performance notes
Ascorbic acid is the pure, direct form of vitamin C and is the most studied for brightening support. Niacinamide (vitamin B3) complements it by targeting the look of uneven skin tone and supporting the skin barrier, which makes the combination appealing for sensitive skin that might find high-concentration ascorbic acid alone to be too stimulating. Together they address the appearance of dullness and discoloration. The soothing and hydrating claims align with aloe as a base ingredient.
What buyers say
862 reviews at 4.5 stars is a strong performance for a budget K-beauty product. This level of approval with a large sample suggests the formula is genuinely well-tolerated and effective for its stated purpose. Buyers in this category tend to be ingredient-focused and likely appreciate the transparent active combination at this price.
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Frequently asked questions
What is an ampoule and how is it different from a serum?
An ampoule is typically a concentrated, lightweight treatment that is more targeted than a standard serum. In Korean skincare it is often applied in a smaller dose after toner and before serum or moisturizer. At 100 ml, this product is unusually large for an ampoule, suggesting it may work more like a daily serum in routine application.
Is vitamin C safe for sensitive skin?
Vitamin C in the form of ascorbic acid can cause tingling or mild sensitivity at high concentrations, but many sensitive skin users tolerate lower-concentration formulas well, especially when combined with calming ingredients like niacinamide. The soothing focus of this formula and its sensitive skin designation suggest it is formulated to minimize irritation, though individual reactions vary.
How long does 100 ml last?
At a typical serum dose of three to five drops once or twice daily, 100 ml can last three to five months, which makes the $19.99 price even more compelling on a per-use basis. Proper storage away from heat and light helps preserve the vitamin C activity over that extended use period.