What the Medicube Ultra Light PDRN Serum is

The Medicube Ultra Light PDRN Serum is a 30 ml watery pink serum — the thinner, faster-absorbing version of Medicube’s original PDRN Pink Peptide Serum. It is aimed at oily and combination skin, at daytime wear under sunscreen and makeup, and at hot weather.

It is also, on the ingredient list, arguably the better of the two formulas. And it costs you nearly five hundred taka less. We will show you why rather than just asserting it.

Medicube comparison table: Original PDRN Serum for dry and normal skin versus Ultra Light PDRN Serum for oily and combination skin — Medicube publishes its own comparison. The Ultra Light is aimed at oily and combination skin and summer use.

Medicube Ultra Light PDRN Serum or original — the honest comparison

Medicube frames this as a texture choice: rich versus watery, dry skin versus oily skin. That is true as far as it goes, but it skips what actually differs in the formula.

Here is what the two ingredient lists show when you put them side by side.

Niacinamide — 5th here, 6th in the original.
Sodium DNA (the PDRN) — 7th here, 8th in the original.
Adenosine — 10th here, 22nd in the original. A large jump for Korea’s approved anti-wrinkle active.
Barrier lipids — lecithin 16th, cholesterol 20th and ceramide NP 21st here. The original has none of the three.
Fragrance — declared at 20th in the original. None at all in this one.

So the “lighter” version has its actives slightly higher, a proper barrier-lipid trio the original lacks, and no fragrance. It is not a diluted original. It is a different and in several respects better formula, sold cheaper because thinner textures cost less to make.

Our recommendation for most people in Bangladesh, and particularly for oily or combination skin: buy the Medicube Ultra Light PDRN Serum rather than the original. If your skin is dry and you want a richer finish for night use, the original makes sense. Otherwise this is the smarter purchase.

Two Medicube Ultra Light PDRN Serum peptides are declared at 0.1 parts per billion

Now the number that stopped us, and we have checked it three times.

Medicube’s Korean legal filing declares two of the peptides in this serum with concentrations printed next to them:

Oligopeptide-1 — 0.1 ppb
Palmitoyl Pentapeptide-4 — 0.1 ppb

Parts per billion. Not parts per million. 0.1 ppb is 0.00000001 percent.

In a 30 ml bottle that works out to roughly three nanograms of each. A single grain of table salt weighs about sixty micrograms — twenty thousand times more. The entire bottle contains, of each of those two peptides, about one twenty-thousandth of a grain of salt.

For scale against the other products we sell: we listed a serum whose collagen was declared at 0.13 ppm and called that vanishing. These peptides are around thirteen hundred times lower again.

We want to be fair about two things. Medicube did not have to print those figures where most buyers would ever see them, and they did. And peptides are potent ingredients that work at low concentrations — but low means parts per million, not parts per billion. Nothing works at three nanograms.

Buy the Medicube Ultra Light PDRN Serum for the niacinamide, the sodium DNA, the adenosine and the ceramides. The peptide list on the front is a label.

The Medicube Ultra Light PDRN Serum ingredient list — all thirty-nine

From Medicube’s Korean legal filing, with the two concentrations they declared. Cross-checked against their English list, which omits the ppb figures entirely.

Water, Propanediol, Butylene Glycol, Glycerin, Niacinamide, 1,2-Hexanediol, Sodium DNA, Xanthan Gum, Ethylhexylglycerin, Adenosine, Citric Acid, Sodium Phytate, Cyanocobalamin, Leontopodium Alpinum (Edelweiss) Callus Culture Extract.

Fish Extract, Lecithin, Dipotassium Glycyrrhizate, Salmon Egg Extract, Arginine, Cholesterol, Ceramide NP, Copper Tripeptide-1, Pearl Extract, Sodium Hyaluronate, Dipeptide-2, Hydroxypropyltrimonium Hyaluronate.

Oligopeptide-1 (0.1 ppb), Palmitoyl Pentapeptide-4 (0.1 ppb), Tripeptide-1, Hydrolyzed Collagen, Hydrolyzed Hyaluronic Acid, Sodium Acetylated Hyaluronate, Hyaluronic Acid, Hydrolyzed Sodium Hyaluronate, Sodium Hyaluronate Crosspolymer, Potassium Hyaluronate, Hydrolyzed Conchiolin Protein, Pearl Powder, Succinoyl Atelocollagen.

The Medicube Ultra Light PDRN Serum is genuinely fragrance-free

Medicube claims “free from artificial fragrance and colorants” on both PDRN serums. On the original that claim needs an asterisk, because fragrance is declared at position twenty of its list.

Here it does not. There is no fragrance, no parfum and no essential oil anywhere in the thirty-nine ingredients. The claim is simply true, and the pink is cyanocobalamin — vitamin B12 — at position thirteen, with no CI pigment in the formula.

If you have been looking for a fragrance-free PDRN serum, this is it, and the original is not. That distinction is not made anywhere in the marketing.

The Medicube Ultra Light PDRN Serum is still fish-derived, and there is pearl in it

The Ultra Light drops the milt extract that the original uses, but it is not vegan and it is not free of animal ingredients.

Fish extract, fifteenth
Salmon egg extract, eighteenth
Hydrolyzed collagen, thirtieth
Succinoyl atelocollagen, thirty-ninth
Pearl extract twenty-third, hydrolyzed conchiolin protein thirty-seventh and pearl powder thirty-eighth — all mollusc-derived

Medicube’s own imagery calls this a Salmon PDRN serum, so the fish origin is not hidden, but the pearl and the collagen are not mentioned anywhere in the marketing.

If animal-derived ingredients matter to you for religious or dietary reasons, the Medicube Ultra Light PDRN Serum contains several, from two different animals. We hold no halal certification for it and cannot advise you on that — we can only make sure you know what is in the bottle before you decide.

Do not use it if you have a fish or shellfish allergy.

Medicube Ultra Light PDRN Serum key ingredients: salmon DNA PDRN, hyaluronic acid, vitamin B12 and niacinamide — Medicube names salmon DNA PDRN, hyaluronic acid, vitamin B12 and niacinamide. The pearl and collagen go unmentioned.

What is genuinely doing the work in the Medicube Ultra Light PDRN Serum

Niacinamide, fifth

The most reliable ingredient in the bottle, and high enough to matter. Tone, clarity and barrier support.

Sodium DNA, seventh

The PDRN. Respectably placed. Worth reading our note below on what topical PDRN can and cannot claim.

Adenosine, tenth

Korea’s approved anti-wrinkle functional active, and twelve places higher here than in the original serum. This is the single biggest formula upgrade between the two.

Ceramide NP, cholesterol and lecithin

Twenty-first, twentieth and sixteenth. Ceramides and cholesterol are two of the three lipids skin uses to build its own barrier, and finding them in a watery serum at these positions is genuinely unusual. The original PDRN serum contains none of them.

Eight forms of hyaluronic acid

Sodium hyaluronate at twenty-four, then seven more derivatives bunched from thirty-one to thirty-six. The multi-weight argument is real but modest — this is one ingredient class listed eight ways, and it is why the serum feels the way it does.

Edelweiss callus culture extract, fourteenth

A plant stem cell extract. Pleasant, well above the peptides, and not something we would buy a serum for.

Medicube Ultra Light PDRN Serum claims after three days: visible skin concerns down 12.95 percent and redness down 3.21 percent — Medicube publishes a 12.95 percent reduction in visible skin concerns after three days. Three days is a very short window for tone.

The Medicube Ultra Light PDRN Serum numbers, and the windows they were measured in

Medicube publishes four figures for the Medicube Ultra Light PDRN Serum, tested by the Global Institute of Dermatological Sciences.

Visible skin concerns down 12.95 percent after three days
Visible redness down 3.21 percent after three days
Deep-layer hydration up 169 percent after one use
Surface moisture up 48.56 percent

Look at the windows rather than the numbers. Three days for a tone claim is very short — pigmentation does not move that fast, and what is being measured in three days is more likely surface hydration changing how light reflects off skin than any change in pigment.

The 169 percent hydration figure is measured after a single use, which is what any humectant serum does for a few hours. It is a real measurement of a temporary effect.

None of this is dishonest — the windows are printed. But a shopper reading “169%” and “12.95%” without reading “after 1 use” and “after 3 days” is going to form the wrong expectation. Give this serum two to three months for anything that lasts.

Medicube Ultra Light PDRN Serum claims a 169 percent deep layer hydration improvement after one use — The 169 percent hydration figure is measured after a single use. That is what humectants do for a few hours.

Percent, ppm, ppb — the arithmetic that settles most arguments

Three units appear on ingredient labels and the gap between them is larger than most people realise. Learn these once and you can read any Korean ingredient list, including ours.

1 percent = 1 part in 100. A working concentration for most actives.
1 ppm = 1 part per million = 0.0001 percent. Ten thousand times smaller than one percent.
1 ppb = 1 part per billion = 0.0000001 percent. A thousand times smaller again.

Now apply it. The two declared peptides in the Medicube Ultra Light PDRN Serum are at 0.1 ppb. Multiply by the 30 ml bottle and you get three nanograms — a quantity you could not weigh on a kitchen scale, a laboratory scale, or most analytical balances.

Run the same arithmetic across products and the picture gets clear fast. A botanical at 300 ppm is 0.03 percent — small but real. An extract at 1 ppm is a rounding error. Anything quoted in ppb is not an ingredient in any functional sense; it is a name on a label.

Two practical rules follow. First, always multiply the figure by the pack size — a percentage means nothing until you know how much product it is a percentage of. Second, be more suspicious of a long ingredient list than a short one. Forty ingredients means most of them are at the bottom, and the bottom of a forty-item list is where marketing lives.

None of this makes the Medicube Ultra Light PDRN Serum a bad buy. Its niacinamide is fifth, its sodium DNA seventh, its adenosine tenth and its ceramides in the twenties. Those are the numbers that matter, and they are good ones. The peptides are simply not part of why it works.

Medicube Ultra Light PDRN Serum shelf life and how long a bottle lasts

Medicube’s Korean filing gives 30 months unopened and 12 months after opening. Twelve months is generous — double what the Arencia serums we stock allow — and it comfortably covers a 30 ml bottle at any sensible rate of use.

There is no vitamin C in this formula, which is the ingredient that usually forces a short opened window. The things that will degrade are the ceramides and the B12 colour, and both are heat and light problems rather than time problems. Keep the bottle in a drawer rather than on a bright shelf and it will be fine for the year.

What topical PDRN can and cannot claim

PDRN is the most hyped ingredient in Korean skincare right now and it is worth separating the evidence from the marketing.

The strong evidence for PDRN is clinical and injected — dermatology clinics use it for wound healing and tissue repair, and that research is genuine. The problem is that it does not transfer to a bottle. DNA fragments are large molecules and the serum sits on top of your skin rather than under it.

Sodium DNA is a decent humectant and there is early work suggesting smaller fragments penetrate better. But anyone telling you a serum does what an injection does is selling. Buy the Medicube Ultra Light PDRN Serum as a good niacinamide-and-ceramide serum with a pleasant texture, and treat the PDRN as an unproven bonus.

How to use the Medicube Ultra Light PDRN Serum

Cleanse, then toner or essence.
Two to three drops onto clean skin, morning or night or both.
Pat in — it absorbs in seconds, which is the point of this version.
Moisturiser, then sunscreen in the morning.

Medicube specifically recommends it under makeup, and the watery texture supports that. There is no acid or retinoid in it, so no build-up period is needed.

How the Medicube Ultra Light PDRN Serum suits this climate

This is the version built for weather like ours. Watery, non-sticky, no oils, absorbs fast, no fragrance to react with sweat, and eight humectants to pull moisture from air that has plenty of it.

Between April and October the Medicube Ultra Light PDRN Serum is the correct choice of the two for most Bangladeshi skin, and Medicube says so themselves — their own comparison table lists the Ultra Light as the summer and daily-care option and the original as night care.

Keep it out of direct sun. Vitamin B12 gives it the pink colour and B12 is light-sensitive; a faded bottle has been stored badly.

Who the Medicube Ultra Light PDRN Serum suits

Good fit: oily and combination skin, humid weather, daytime and under-makeup use, anyone who dislikes heavy serums, anyone avoiding fragrance, and anyone wanting ceramides in a lightweight base.

Poor fit: very dry skin wanting a rich finish, anyone avoiding fish or shellfish-derived ingredients, anyone with a fish or shellfish allergy, and anyone buying it for the peptides.

What 30 ml of the Medicube Ultra Light PDRN Serum works out to per use

Two to three drops is roughly 0.3 ml, so a 30 ml bottle gives about a hundred applications — three months once daily, six weeks twice daily.

That is a little under fifteen taka per use, which makes the Medicube Ultra Light PDRN Serum the cheapest per-use serum we stock and one of the better-built ones. Medicube also makes a 110 ml size which we do not currently carry.

Questions we get asked

Is the Medicube Ultra Light PDRN Serum weaker than the original?

No. It is thinner. On actives it is slightly stronger — niacinamide, sodium DNA and especially adenosine all sit higher, and it adds ceramides the original does not have.

Is the Medicube Ultra Light PDRN Serum vegan?

No. It contains fish extract, salmon egg extract, hydrolyzed collagen, succinoyl atelocollagen, and three pearl-derived ingredients.

Is the Medicube Ultra Light PDRN Serum fragrance-free?

Yes, genuinely — unlike the original, which declares fragrance at position twenty.

Are the peptides worth anything at 0.1 ppb?

No. That is three nanograms in a 30 ml bottle. Two of the peptides carry that figure; the others carry no declaration.

Can I use the Medicube Ultra Light PDRN Serum with my other serums?

Yes, it layers easily. Do not stack it with another niacinamide serum — pick one for that step.

Is the Medicube Ultra Light PDRN Serum safe in pregnancy?

There is no retinoid, no salicylic acid and no exfoliating acid in it. Ask your doctor rather than a shop.

How we store and ship the Medicube Ultra Light PDRN Serum

Stock sits in air-conditioned storage in Dhaka until it goes out. B12 fades in light and heat, and ceramides and peptides degrade warm.

Your bottle is sealed when it leaves us and it is stock we imported ourselves, not a unit bought from another local seller and passed on. Medicube’s Korean listing gives 30 months unopened and 12 months after opening for this formula. If it arrives unsealed, leaking or pale, raise it with us the day it lands and we will replace it.

Where the Medicube Ultra Light PDRN Serum fits in your routine

Cleanse, toner or essence, this, moisturiser, sunscreen in the morning. It is thin enough to go early in a layered routine and fast enough not to hold you up.

Buying the Medicube Ultra Light PDRN Serum in Bangladesh

Sealed 30 ml bottle, imported by us, in stock in Dhaka with nationwide delivery. Every ingredient and both declared concentrations come from Medicube’s Korean legal filing, and you can check any ingredient name against the EU CosIng database yourself.

Compare it against our other serums, or see everything we stock from Medicube.

salmon PDRN

Medicube Ultra Light PDRN Pink Peptide Serum 30ml