Which of the three is the small, low molecular weight one?

Only one can be identified from the label. Hydrolyzed Hyaluronic Acid means the chain has been broken into shorter pieces, so by definition it is the smaller material. The names Sodium Hyaluronate and Hyaluronic Acid carry no size information whatsoever, and COSRX publishes no molecular weights. There is also no size that wins across the board: comparisons in the published literature point different ways.

How does this differ from The Hyaluronic Acid 3 Serum?

Different range, different naming logic. In that serum the numeral is a strength, and its list prints a single hyaluronate at three percent. Here the word Triple genuinely counts three separate hyaluronates, and none of them carries a stated figure. This ampoule is also much simpler at fifteen entries, with no ceramide, no amino acid group and no alcohol on the label.

Do the two acids at the end exfoliate my skin?

Not in any meaningful way. Gluconolactone and Lactobionic Acid sit fourteenth and fifteenth, right at the bottom, and the formula carries no other chelating agent. At that depth the likeliest job is steadying pH and holding trace metals rather than resurfacing anything. Read this as a hydrating step, not an exfoliating one, and leave your usual acid night exactly as it is.

Is it enough on its own?

For most skin, no. There is no oil, butter, silicone or other occlusive anywhere in the fifteen entries, so the layer binds water without anything slowing its escape. In a heated room or in winter that water goes. Put a moisturizer over the top. On oily skin in humid weather it may honestly be all you want, which is the trade-off working in your favour.

Is it fragrance-free and alcohol-free?

Both, judged on the list COSRX publishes. You will not find parfum there, nor added scent, nor an essential oil, nor any of the six allergens that most often require declaring. There is no alcohol denat, no silicone and not a single plant extract either. Preservation runs on 1,2-hexanediol, ethylhexylglycerin and gluconolactone rather than phenoxyethanol or a paraben, which is unusual at this price.

We are not labelling it that. Nothing on the list is obviously animal-derived, but hyaluronic acid reaches cosmetics both from bacterial fermentation and from animal material, and COSRX publishes neither a source for these three hyaluronates nor a vegan claim for this product. Retailer listings asserting otherwise are not brand substantiation, so the tag stays off until the brand says so.

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COSRX

COSRX Hydrium Triple Hyaluronic Moisture Ampoule 40ml

Three hyaluronates
Pro-vitamin B5
Oil-free
Fragrance-free

40ml ·$17.99 USD

Three hyaluronates

Pro-vitamin B5

Oil-free

Fragrance-free

PRODUCT DETAILS

Triple is a count here, and the count is accurate. COSRX lists Sodium Hyaluronate seventh, Hyaluronic Acid twelfth and Hydrolyzed Hyaluronic Acid thirteenth, and prints all three on the front of the bottle. That is worth stating plainly, because the brand's separately named Hyaluronic Acid 3 Serum uses its figure as a strength instead. What a tally of three does not establish is better hydration. The guidance our own ingredient library cites is explicit that a larger form count proves nothing without a direct comparison between finished products.

Read the order and a fuller picture appears. Only the first hyaluronate sits high. The other two fall below carbomer and the preservative pair, so they are there in small amounts. Much of the water-binding is shared with glycerin in second place, then butylene glycol, dipropylene glycol and methyl gluceth-10, a polyol base doing work the name credits to the acid.

The other half of the front label is pro-vitamin B5. Panthenol sits ninth, and it is the ingredient COSRX names across the whole Hydrium range. Fifteen entries is the complete list: no oil, no butter, no silicone, no alcohol, no fragrance and not one botanical extract.

That last point cuts both ways. Nothing in it is occlusive, so the layer binds water with no lipid to slow its escape. Dry skin and heated rooms want a moisturizer over the top. On oily, dehydrated skin the absence of oil is precisely the reason to reach for it.

Learn more

GOES WELL WITH

100 Reedle Shot Stick Pouch$8.09 USD

1025 Dokdo Cleanser$11.99 USD

1025 Dokdo Eye Cream$22.99 USD

1025 Dokdo Lotion$14.99 USD

1025 Dokdo Sleeping Pack$15.99 USD

1025 Dokdo Sun Cream$18.99 USD

1025 Dokdo Cream$24.99 USD

1025 Dokdo Pad$20.99 USD

Three hyaluronates and pro-vitamin B5, on a list of fifteen with no oil, silicone, added scent or plant extract to complicate it.

Three hyaluronates, named on the bottle
Pro-vitamin B5 in ninth place
Fifteen ingredients and no oil
Thin enough to disappear under anything

Key Ingredients

Clear hydrogel spheres and droplets on a pale lilac background.

Hyaluronic Acid

Helps hydrate and visibly plump the skin.

Panthenol

Pro-vitamin B5 that helps skin hold moisture and feel softer and more comfortable.

A glass pipette angled across pale grey, one round bead of clear gel resting where the tip meets the surface.

Concerns & Benefits

Your Concerns

1
Dehydration
Tightness that returns within minutes of cleansing, however much water-based product goes on.
2
Texture
A papery, uneven surface that catches on makeup and refuses to sit smooth.

How To Use

1After cleansing, and after a toner if you use one, tip two or three drops onto your fingertips and press them over the face, keeping clear of the eyes and mouth. Let it sink in for a moment first.
2Either end of the day is fine. Nothing in it is photosensitizing and there is no retinoid or functional acid, so it slots into either end of the day without rearranging anything else.
3Follow it with a moisturizer. Because there is no oil or occlusive in the formula, the water it holds needs something above it to stay put, and that matters most in winter and under air conditioning.

Two hands meeting over a pale surface as a pipette lays a small clear bead across the back of one of them.

Frequently asked questions

Does Triple mean three types of hyaluronic acid?

Yes, and in this case the count is real. Three separate hyaluronates appear on the label, being the plain acid, its sodium salt and a hydrolyzed version, and the bottle prints all of them. One thing worth knowing, though: a bigger tally is not evidence of stronger hydration. The consumer-protection guidance our ingredient library cites says a form count on its own establishes nothing unless two finished products are compared directly.

Keep learning

Customer reviews

Frequently Bought Together

Buy these products together

This itemCOSRX Hydrium Triple Hyaluronic Moisture Ampoule 40ml$17.99 USD

100 Reedle Shot Stick Pouch$8.09 USD

1025 Dokdo Cleanser$11.99 USD

Total price: $38.07 USD

This itemCOSRX Hydrium Triple Hyaluronic Moisture Ampoule 40ml$17.99 USD

100 Reedle Shot Stick Pouch$8.09 USD

1025 Dokdo Cleanser$11.99 USD

Total price: $38.07 USD

VT COSMETICS

100 Reedle Shot Stick Pouch

A travel-size evening booster for smoother-feeling, more refined-looking skin.

2 mL × 10$8.09 USD

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1025 Dokdo Cleanser

Creamy, slightly acidic foam for a comfortable cleanse

150 ml$11.99 USD

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1025 Dokdo Eye Cream

Lightweight daily eye care for hydration, brightness and smoother-looking fine lines.

30 ml / 1.01 fl oz$22.99 USD

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1025 Dokdo Lotion

A lightweight, unscented facial moisturizer with three forms of hyaluronic acid for lasting moisture without stickiness.

200 ml$14.99 USD

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1025 Dokdo Sleeping Pack

A lightweight, unscented overnight gel for hydration and smoother-feeling skin.

100 ml$15.99 USD

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1025 Dokdo Sun Cream

SPF 50+ PA++++ protection in a lightweight, no-white-cast lotion.

50 ml$18.99 USD

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1025 Dokdo Cream

A rich, unscented balm moisturizer for lasting hydration and a soft, cushioned feel.

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1025 Dokdo Pad

Two-sided toner care for tidier texture and balanced moisture.

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COSRX Hydrium Triple Hyaluronic Ampoule 40ml | Sleepy Hello

COSRX

COSRX Hydrium Triple Hyaluronic Moisture Ampoule 40ml

Three hyaluronates
Pro-vitamin B5
Oil-free
Fragrance-free

COSRX Hydrium Triple Hyaluronic Moisture Ampoule 40ml

40ml ·$17.99 USD

Three hyaluronates

Pro-vitamin B5

Oil-free

Fragrance-free

PRODUCT DETAILS

Learn more

GOES WELL WITH

100 Reedle Shot Stick Pouch$8.09 USD

1025 Dokdo Cleanser$11.99 USD

1025 Dokdo Eye Cream$22.99 USD

1025 Dokdo Lotion$14.99 USD

1025 Dokdo Sleeping Pack$15.99 USD

1025 Dokdo Sun Cream$18.99 USD

1025 Dokdo Cream$24.99 USD

1025 Dokdo Pad$20.99 USD

Three hyaluronates and pro-vitamin B5, on a list of fifteen with no oil, silicone, added scent or plant extract to complicate it.

Three hyaluronates, named on the bottle
Pro-vitamin B5 in ninth place
Fifteen ingredients and no oil
Thin enough to disappear under anything