What is COSRX The Hyaluronic Acid 3 Serum?
COSRX The Hyaluronic Acid 3 Serum is a concentrated hydrating serum from COSRX's minimalist The range, the line that puts one key ingredient front and centre. Here that ingredient is hyaluronic acid, used as sodium hyaluronate, supported by a long list of amino acids, betaine, sodium PCA and barrier lipids such as ceramide NP and cholesterol.
It is not an exfoliant and not an oil. Its job is simple: attract and hold water in the upper layers of the skin so it looks fuller, smoother and more comfortable. That makes it one of the easiest serums to add to any routine.
Why does skin need a hydrating serum?
Hydration and moisture are different. Hydration is water content; moisture is the oils that keep water in. Oily skin can be shiny yet dehydrated, which shows up as tightness, fine dehydration lines and makeup that cracks. A hyaluronic serum tops up the water, and your moisturiser seals it.
COSRX The Hyaluronic Acid 3 Serum benefits: what it does for your skin
Plumper, dewier skin straight away
Within minutes of applying, skin looks fuller and has a soft, healthy sheen rather than shine. Fine dehydration lines around the eyes and mouth look softer.
Comfort for skin on strong actives
Retinoids, acids and acne treatments can leave skin tight and flaky. Layering this serum on those nights reduces that dry, stretched feeling and makes the routine easier to stick with.
A smoother base for makeup and sunscreen
Hydrated skin takes makeup and SPF more evenly, so bases look smoother and are less likely to cling to dry patches by afternoon.
COSRX The Hyaluronic Acid 3 Serum key ingredients
| Ingredient | What it does |
|---|---|
| Sodium hyaluronate | Holds many times its weight in water for instant plumping |
| Amino acids (serine, glycine, alanine and more) | Natural moisturising factors that keep skin supple |
| Betaine and sodium PCA | Extra humectants that boost hydration |
| Ceramide NP and cholesterol | Support the skin barrier so water stays in |
The formula skips fragrance and essential oils among its key ingredients, which helps sensitive skin. Browse more humectant-led formulas in our hyaluronic acid edit.
Is COSRX The Hyaluronic Acid 3 Serum good for your skin type?
Oily and combination skin
Yes. The light texture adds water without oil, so the T-zone does not get greasier. Many oily-skin users find their skin produces less shine once it is properly hydrated.
Dry skin
Use it as a hydrating layer under a richer cream. On its own it will not be enough for very dry skin, but together they make a big difference.
Sensitive and acne-prone skin
Its simple, calming formula suits reactive skin, and it is a useful partner to acne treatments that dry the skin out. Pair it with a gentle wash such as the COSRX Low pH Good Morning Cleanser.
How to use COSRX The Hyaluronic Acid 3 Serum (morning and night)
In your morning routine
- Cleanse and apply toner.
- While skin is still a little damp, press in two or three drops.
- Add a vitamin C or niacinamide serum if you use one, then moisturiser.
- Finish with a broad-spectrum sunscreen.
In your evening routine
After your treatment step, such as a retinol or the celimax Vita-A Retinol Shot, apply the hyaluronic serum and then a moisturiser. On rest nights, it can be your only serum.
How much should you use?
Two to three drops cover the face and neck. Using more does not add hydration and can feel tacky. A 20ml bottle lasts around one to two months with daily use, depending on how often you apply it.
Using a hyaluronic acid serum in Pakistan's climate
Pakistan swings between sticky monsoon humidity and very dry winter air, often with air-conditioning or room heaters indoors. Humectants behave differently in each. In humid months, this serum alone under a light gel moisturiser may be all the hydration oily skin needs. In dry months or long hours in air-conditioned offices, apply it on damp skin and always seal it with a thicker cream, otherwise water can evaporate and leave the skin feeling tighter.
A quick tip for hot days: keep the bottle away from sunny windowsills and car dashboards. Heat will not make it unsafe, but storing it cool keeps the texture pleasant and stable until the last drop.
How to layer it with the rest of your routine
The general rule is thinnest to thickest. Toner first, then water-light serums like this one, then thicker serums or treatments, then cream, and sunscreen in the morning. If you use a vitamin C or retinol product, apply that first so it reaches clean skin, wait a minute, then press in the hyaluronic serum to cushion it. This order keeps actives effective while reducing dryness.
- Pairs well with: niacinamide, vitamin C, retinol and retinal, peptides, ceramides.
- No real clashes: hyaluronic acid is a friendly ingredient that works with almost everything.
- Skip only if: a product makes you itch, in which case stop and check the full routine.
COSRX The Hyaluronic Acid 3 Serum results: how long until you see a difference?
Hydration shows instantly: skin feels softer and looks plumper as soon as it absorbs. Over two to four weeks of daily use, tightness and dullness usually ease, and dehydration lines look less noticeable. It is a support serum, so pair it with targeted treatments for concerns like pigmentation or acne.
Does COSRX The Hyaluronic Acid 3 Serum have side effects?
Side effects are rare. A few people feel slight stickiness if they use too much, and in very dry rooms hyaluronic acid can make skin feel tight if it is not sealed with a moisturiser. Stop if you notice itching or rash.
Hyaluronic acid serum vs other hydrating serums
| COSRX Hyaluronic Acid 3 Serum | COSRX Snail 96 Essence | ANUA Peach 70% Niacinamide Serum | |
|---|---|---|---|
| Main focus | Pure hydration | Hydration and repair | Brightening and even tone |
| Texture | Light gel serum | Slippery essence | Milky serum |
| Best for | Dehydration, tightness | Barrier support, redness | Dullness, uneven tone |
Choose this serum for straightforward hydration. The COSRX Snail 96 Mucin Power Essence adds a repairing feel, and the ANUA Peach 70% Niacinamide Serum suits those who want brightening. Many routines use the hyaluronic serum alongside one of these.
COSRX The Hyaluronic Acid 3 Serum price in Pakistan
This serum comes in a 20ml bottle, and the current price is shown live at the top of the page. It is one of the more affordable ways to add serious hydration, and because it suits everyone in the family, it is easy to share in a routine.
Original vs fake COSRX The Hyaluronic Acid 3 Serum: how to check
A genuine bottle comes in a sealed box with crisp printing and matching batch and expiry codes. The serum is clear, slightly gel-like and nearly scentless. Cloudiness, separation or a perfume smell are red flags.
YESBEAUTY is an authentic seller of COSRX in Pakistan, sourcing every bottle directly from COSRX's official distribution channels in Seoul, Korea. Part of the Korean Skincare group, we stand behind each order with a 7-day return guarantee if a product is ever found inauthentic. Read our Authenticity Promise or see all COSRX.
Best hydrating serum for dehydrated skin in Pakistan: where this one fits
For pure, no-fuss hydration, this is an excellent first pick. Combine it with brightening or treatment serums from our serums and ampoules edit, and explore our dryness and dullness collections for the rest of a hydration-first routine.
