Best Serum at Olive Young Starts With the Ingredient List

Updated October 2026

SKIN1004 Madagascar Centella Ampoule shows what the best serums to buy at Olive Young have in common: a 7-ingredient list, pH 5.5-7.5 and a tested hydration result. It suits all skin types, and dry and sensitive skin get the most from it.

We're the SKIN1004 guide team, and this is how we read a serum shelf. A long row of serums is easier to sort once you check three things in order: the ingredient list, the pH, and whether a human application test stands behind the hydration or oil-control promise. Packaging, trend words and the number of claims on the box come after those three.

What the best serums at Olive Young have in common

A serum earns its place in a routine by doing one job well. For most shoppers that job is hydration with a light feel, calming for skin that looks red or reactive, or oil balance for skin that turns shiny by midday. The best serums state which job they do and give you the facts to check it.

A short ingredient list you can actually read

The shorter the list, the easier it is to know what is doing the work. On a long list, the ingredients you came for can hide far down behind fillers and scent. On a short list, the first five positions tell you almost everything: the base, the humectants that hold water in skin, and the key extract.

A pH close to skin

Skin's surface is mildly acidic, and a serum formulated near that range is easy to wear every day. A stated pH on the product page is a good sign that the brand has measured it.

A test result behind the claim

"Hydrating" and "oil control" are easy to print. A percentage from a human application test, with the number of participants and the measuring device, is harder to fake and tells you what to expect after one use.

Madagascar Centella Ampoule by the numbers

Centella Ampoule

19.8 USD

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SKIN1004 Madagascar Centella Ampoule is USD 17.60 for 100ml, and the global store also sells 55ml and 30ml bottles. The full ingredient list is seven items long: Water, Glycerin, Butylene Glycol, Centella Asiatica Extract, 1,2-Hexanediol, Cellulose Gum, Ethylhexylglycerin. Glycerin and Butylene Glycol hold moisture, Centella Asiatica Extract from Madagascar is the soothing core, and the last three keep the formula stable and give it a light, fluid body.

The table below gathers the label facts and the test results in one place.

The ingredient list also contains no fragrance, essential oils or ethanol, so skin that reacts to scent or drying alcohol can use it comfortably. The ampoule completed a human application test for non-comedogenicity as well, which matters if breakouts are part of the reason you are shopping for a new serum.

How the test results read for each skin type

Two results from one serum give different readers different answers. Dry skin feels the 142.28% hydration result most, because tightness after cleansing is the first thing it notices. Oily skin looks at the sebum result: in that test, excess sebum improved by 45.72% right after one use. Combination skin benefits from both at once, since a dry cheek and a shiny forehead can share one serum.

Sensitive skin gets two things from the label: a short, unscented list, and a hydration result measured on participants with sensitive skin. That gives you a realistic picture before the first drop.

If your skin is oily and still feels tight after cleansing, The Right Hydrating Serum for Oily, Dehydrated Skin goes further into balancing oil and moisture together.

Using the ampoule in a daily routine

The order is simple. Cleanse, apply two or three drops of SKIN1004 Madagascar Centella Ampoule while skin is still slightly damp, then follow with moisturizer, and with sunscreen in the morning. The texture absorbs quickly and leaves no sticky residue, so the next layer goes on smoothly and makeup has a clean base.

Consistency matters more than layering tricks. A serum you enjoy wearing twice a day will do more for your skin than a heavier one you skip on busy mornings. For skin that breaks out and feels damaged at the same time, Barrier Repair Serum for Acne-Prone Skin: How to Pick covers how to weigh calming ingredients alongside acne-safe formulation.

Choosing the right size for your routine

Size changes the value of a serum more than the shelf price suggests. The 100ml bottle at USD 17.60 works out to about 18 cents per ml, and at two or three drops twice a day it lasts several months. The 30ml bottle is the easy choice for travel or for a first try, and the 55ml bottle is the middle option for people who finish a serum every couple of months.

If you already know the ampoule suits your skin, the larger bottle keeps the daily price low. If you want to check how your skin responds first, start small and size up once you know. For a closer look at how a seven-item formula hydrates on its own terms, read A Hydrating Serum Without Niacinamide: Seven Ingredients.

FAQ

What should I check first on a serum at Olive Young?

Start with the ingredient list and look at the first five positions. Humectants such as glycerin and butylene glycol near the top tell you the serum will hydrate, and a short list makes reactions easier to trace.

Is Madagascar Centella Ampoule good for oily skin?

Yes. In a human application test with 22 participants, excess sebum improved by 45.72% after one use, and the ampoule completed a non-comedogenic human application test. The light texture also layers under sunscreen and leaves a clean finish.

Can sensitive skin use a centella serum every day?

SKIN1004 Madagascar Centella Ampoule has a seven-ingredient list with no fragrance or essential oils and a pH of 5.5-7.5. Its hydration result of 142.28% after one use was measured on participants with sensitive skin, so daily morning and night use is a comfortable fit for most routines.

Which size of the ampoule is the best value?

The 100ml bottle at USD 17.60 is about 18 cents per ml, the lowest daily price of the three sizes. The 30ml and 55ml bottles suit travel or a first try.