PDRN ‘salmon DNA’ skincare is trending on TikTok, and dermatologists say it could help improve skin barrier strength and hydration when used correctly

‘Salmon DNA’ skincare is trending, racking up thousands of views on TikTok – but what is it, and how should we be using it? We asked dermatologists for the low down on beauty’s latest viral ingredient, and discovered five ways it could help users improve their complexion in 2026.

PDRN is the trending K-beauty ingredient that experts say supports skin repair, hydration and barrier strength. Short for polydeoxyribonucleotide, PDRN is most commonly derived from purified salmon DNA.

Originally developed for medical wound healing, it’s now one of 2026’s most talked-about skincare ingredients. As beauty fans move from aggressive exfoliation and skin cycling, PDRN aims to improves the skin’s hydration through enhancing moisture retention and structural resilience – and it’s gentle enough for most skincare enthusiasts to use.

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Here are five expert-backed ways to incorporate PDRN into your routine, and the standout products worth trying now.

1. Use PDRN as a daily barrier-support serum

Dermatologists describe PDRN as a “long-game” ingredient. It’s not a miracle worker or quick fix, but offers daily support for healthier skin. It can be used morning or evening – or both – after cleansing, but before moisturising.

Dr Ross Perry, Medical Director of Cosmedics Skin Clinics , explained: “PDRN encourages the skin to repair itself more efficiently. It helps kick-start fibroblast activity – the cells responsible for collagen and elastin – improving skin quality over time rather than offering a short-term cosmetic fix.”

For anyone wanting improved hydration, glow and barrier resilience without irritation, a purse-friendly option is the PDRN Serum from Boots, priced at £8 . Lightweight and non-sticky, it layers well under SPF and makeup, making it an easy entry point into recovery-first skincare.

2. Pair PDRN with retinoids to reduce irritation

Retinol remains a gold-standard active in skincare, having grown in popularity in recent years, but it can cause irritation for some users, particularly beginners, those with sensitive skin, or during the adjustment phase when upping the strength.

For retinol users, Dr Ewa Kania – an aesthetic doctor and regenerative skin specialist -recommends the Anua PDRN Hyaluronic Acid Capsule 100 Serum , calling it a ‘great affordable option for sensitive or retinoid-averse skin’. Combining PDRN with hyaluronic acid, it delivers hydration while supporting barrier repair, which is particularly helpful if your skin feels sensitised from retinol use.

3. Use PDRN post-procedure or after over-exfoliation

Because PDRN was originally developed for wound healing, it fits naturally into post-procedure routines. Consultant Dermatologist Dr Aiza Jamil added: “It acts as a regenerative ingredient that interacts with cellular mechanisms involved in repair and homeostasis. It was originally used in aesthetic and medical dermatology for wound healing, but is now formulated into topical products like serums, creams, ampoules and toners.”

Said to be ‘excellent for post-procedure repair and barrier support’, the Dr Reju-All Advanced PDRN Rejuvenating Cream, is £32.89 at Superdrug. Often sold out at Korean pharmacies, according to Glam Touch, it’s designed for oily, dry, and combination skin types and helps the skin recover from daily environmental stress while restoring hydration, glow, and firmness overnight.

4. Choose PDRN for hydration and ‘glass skin’ glow

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On TikTok, PDRN has gained traction under the nickname “salmon DNA skincare.” The hashtag #PDRN already has over 194K posts, while #GlassSkin has surpassed 1.3 million. Searches for K-beauty on TikTok Shop are up 125% in the last six months of 2025, with #kbeauty now the third most-used beauty hashtag in the UK.

A viral favourite is the Medicube PDRN Pink Peptide Serum , stocked at Boots. It combines PDRN with peptides for a plumper, more radiant look over time. One shopper commenting: “Amazing! This serum has helped my dry skin so so much! I had one stubborn patch around my nose that no moisturiser has helped, but one week of Salmon PDRN and it’s clearing up.”

However, another shopper claimed it caused them to break out in blemishes, which goes to show that not every skincare product or ingredient will suit everyone. It’s also worth remembering to complete a patch test when introducing any new product or ingredient into your skincare routine, especially as, in some rare cases, those with fish allergies may not find the product suitable for them.

5. Opt for vegan alternatives if you prefer non-animal formulas

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Most PDRN is derived from salmon DNA, which may not be suitable for everyone, either for moral reasons, or for health reasons – such as potential allergies. As such, fermentation-based and vegan alternatives are emerging, such as the Yepoda The Skinject Effect.

Dr Kania said it is made with ’exosomes and microspicule delivery, appealing to ethically minded clients and next-gen regenerative positioning’. With its gentle yet powerful formula, it refines skin over time, stimulates collagen production, and supports the skin’s natural barrier.

She was last seen near the Old Anchor pub in Sutton

Police are searching for a woman who has not been seen in five days. Carol Hillier, 64, from Sandy in Bedfordshire, was last seen near Sutton in East Cambridgeshire.

She was spotted at around 11.20am on Sunday, February 15, near the Old Anchor pub, off Bury Lane, Sutton, near Ely. She has been described as white, 5’4, of medium build, with mousy grey, chin-length hair, and grey/blue eyes.

Carol, who wears glasses, was last seen wearing a dark plum coloured Rohan coat, pale blue beanie hat, dark walking trousers, and was carrying a small rucksack. Officers are currently searching in water and green areas near to where her silver Mercedes E Class estate was found parked opposite the pub.

Anyone who has seen Carol on or since Sunday or has footage of her should come forward to the police. You can report anything through the force website quoting the reference number 233 of 15 February.

Detective Inspector Alice Draper said: “I’m appealing to anyone who may have seen Carol since on or since Sunday to get in touch with us so we can target our searches.

“We still hold out hope of finding Carol alive, but specialist officers are searching areas of water in the vicinity where her car was found.

“If anyone has seen her or has dashcam footage, it would really help us to narrow down our search area.”

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Diana Henry is the Telegraph’s much-loved cookery writer. She shares recipes each week, for everything from speedy family dinners to special menus that friends will remember for months. She is also a regular broadcaster on BBC Radio 4, and her journalism and recipe books, including Simple and How to Eat a Peach, are multi-award-winning. A mother of two sons, Diana can satisfy even the fussiest of eaters.   

Over 95% of the world’s adult population is infected with Epstein–Barr virus (EBV), but most people never realise it. The infection often causes few symptoms and then stays in the body for life.

But for a small minority, EBV is linked to serious disease. For more than 50 years, EBV has been recognised as the first virus shown to contribute to certain cancers, and is therefore classified as a group one carcinogen.

More recently, strong evidence suggests it plays a key role in the development of multiple sclerosis (MS), a disease in which the immune system attacks the brain and spinal cord. MS affects millions of people worldwide and is often diagnosed in early adulthood, with symptoms that can vary unpredictably over time.

I was part of a research team who explored how EBV infection may help initiate MS. Our findings suggest the disease could potentially be targeted by blocking the brain inflammation associated with EBV infection.

Using lab mice with a human-like immune system, we found that after infection, B cells (immune cells that produce antibodies and help coordinate immune responses) became unusually active and travelled into the brain. Here, they released signals that attracted T cells, which recognise and destroy infected or abnormal cells.

Together, these immune cells caused inflammation and early brain damage similar to what is believed to happen in the early stages of MS. When we used a commonly prescribed drug to remove the B cells, there were far fewer T cells in the brain and much less immune activation.

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Epstein-Barr virus: how does a common infection trick the immune system into attacking the brain in people with MS?

This suggests EBV may help set MS in motion by altering how B cells behave. These changed cells can enter the brain and drive inflammation, drawing in T cells that intensify the immune response. Targeting these B cells early could help prevent or slow the development of MS.

However, exactly how EBV contributes to MS is still being investigated.

MS affects the central nervous system, the brain and spinal cord. In people with MS, the immune system damages myelin, the protective coating around nerve fibres that helps electrical signals travel quickly. When it is stripped away, messages between the brain and body slow down or fail.

Over time, repeated damage can also affect the nerves themselves, leading to symptoms such as problems with movement, vision, balance and fatigue.

MS is an autoimmune disease. This means the immune system mistakenly attacks the body’s own tissues. One leading explanation for how EBV fits into this process is a form of mistaken identity, where immune responses first directed at the virus begin to resemble those aimed at myelin by people who have MS.

Why doesn’t everyone develop MS?

If EBV infection is so common, why doesn’t everyone develop MS? Other factors shape risk, including genetics, sex, smoking, obesity and low vitamin D levels. EBV appears to be an important part of the puzzle, but it is unlikely to act alone.

EBV infects B cells, the immune cells that produce antibodies, and can remain dormant inside them for life. But in some situations, the virus can reactivate. EBV-infected cells have been linked to certain cancers when immune control fails.

New research is beginning to reveal what this looks like inside the nervous system. A recent study found unusually high numbers of EBV-targeting immune cells in the cerebrospinal fluid, which surrounds the brain and spinal cord, of people with MS. Many were T cells primed to recognise the virus, suggesting the immune system may be responding to EBV activity within the central nervous system.

When immune cells gather there, they can spark inflammation. This allows more immune cells to enter the brain and spinal cord and cause local damage, forming patches known as lesions that underpin many symptoms of MS.

Treatments and the role of B cells

Current treatments mostly work by calming the immune system rather than targeting a single cause. Many of these medicines are immunosuppressants, which can increase infection risk but also reduce relapses and slow disease progression.

One of the most effective MS treatments targets B cells using monoclonal antibody drugs, laboratory-made proteins designed to recognise specific immune cells. Examples include ocrelizumab, rituximab and ofatumumab. These therapies reduce B cell numbers and may also lower the pool of EBV-infected cells.

These treatments have improved outcomes for many patients. But by dampening part of the immune system, they can also increase infection risk and reduce vaccine responses.

This raises an obvious question: could preventing EBV infection stop MS developing in the first place? And if so, why not prevent EBV infection with a vaccine?

Developing EBV vaccines has proved difficult, partly because the virus hides inside cells and establishes lifelong infection. Researchers are exploring this area, and none are currently approved. It remains unclear whether preventing EBV infection would reduce MS risk.

The link between EBV and MS is now one of the most active areas in MS research, and is reshaping how prevention and treatment are being explored.

Rather than viewing MS solely as an immune system disorder, researchers are increasingly investigating whether stopping EBV infection, or targeting cells that harbour the virus, could reduce a person’s risk of developing the disease or slow its progression.

This shift is driving new strategies, including therapies aimed at EBV-infected B cells, and efforts to design vaccines or immune-based treatments that interrupt the biological processes connecting the virus to MS. If successful, these approaches could move MS care beyond symptom control, towards prevention or earlier disease-modifying interventions.

The Home Secretary has agreed for venues to stay open until 1am for most knockout games and until 2am for 10pm kick-offs during the 2026 FIFA World Cup.

The extension would apply if any of the home nations reach the knockout stage of the tournament, which will be hosted in the United States, Canada, and Mexico.

Pubs to stay open until 2am for knockouts of World Cup 2026

Home Secretary Shabana Mahmood said: “With later kick-offs at this year’s World Cup, we don’t want pubs to blow the final whistle before the winning goal.

“So we’re showing red tape the red card and taking pub hours to extra time so fans can get another round in without missing a single kick.

“We’re toasting our boys at the World Cup and our locals this summer.

“Fans won’t need to go home, before football’s come home.”

The time difference with North America means some matches could finish late into the night, and the Government has agreed to extend licensing hours until 1am for most knockout games and 2am for matches with a 10pm kick-off.

Pubs will also be able to apply for a temporary licence for any very late kick-offs that could finish beyond 2am, given the time difference.

Earlier plans reportedly considered restricting late openings only if a home nation reached the quarter-finals, but she has agreed to extend opening hours until 1am for most knockout games and 2am for those kicking off at 10pm.

The British Beer and Pub Association told The Sun that the move is “a win for pubs, jobs and community spirit.”

IT’S FULL TIME AND WE’RE GOING TO THE WORLD CUP! #SCODEN pic.twitter.com/AmGa2JDhR7

— Scotland National Team (@ScotlandNT) November 18, 2025

England and Scotland World Cup Group stage matches and times

England and Scotland have already qualified for the tournament, which begins on June 11, while either Wales or Northern Ireland could still secure a place through the play-offs.

England are in Group L with Croatia, Ghana and Panama, with Scotland in Group C, alongside Brazil, Morocco and Haiti.

Recommended reading:

England’s group stage fixtures and UK kick-off times are as follows:

• England vs Croatia – June 17, 9pm UK time, Dallas
• England vs Ghana – June 23, 9pm UK time, Boston
• Panama vs England – June 27, 10pm UK time, New York-New Jersey

Scotland’s group stage fixtures and UK kick-off times are as follows:

• Haiti vs Scotland – June 14, 2am UK time, Boston
• Scotland vs Morocco – June 19, 11pm UK time, Boston
• Scotland vs Brazil – June 24, 11pm UK time, Miami

Who do you think will win the World Cup this year? Let us know in the comments.

The article below is an excerpt from Simon Calder’s travel newsletter. To get the latest from Simon delivered straight to your inbox, simply enter your email address in the box above.

Isolation is not always splendid. Five years ago this week I awoke in the Heathrow Novotel, one of the strip of hotels north of the runways. I had checked in for the final night before this unremarkable property became a quarantine hotel – complete with security guards to ensure none of the guests made a break for it. I checked out on 15 February shortly before the first involuntary inmates from “red list” nations arrived. They paid £1,750 for an all-inclusive package: 10 nights’ accommodation, three meals a day and two Covid tests.

For almost the rest of that miserable pandemic year, travellers arriving from countries regarded as high risk were incarcerated. The system unravelled shortly before Christmas 2021. “I’ve had nine walk out on me so far,” a guard at the Gatwick Sofitel told me in mid-December. “They face a £10,000 fine but the police aren’t interested.” MPs on the Transport Select Committee later found “no evidence” that hotel quarantine provided the slightest benefit compared with self-isolation at home. What a difference five years makes. Yesterday Accor, parent company of Novotel, reported that revenue per available room – RevPAR, the key metric in the hotel industry – rose 4.2 per cent to €76 (£66). People seem much happier when they are free to travel where they wish.

Anticipation is a much more positive emotion than hindsight. I look forward to testing out the new visa-free access to China on a trip to Chengdu in the west of the People’s Republic next month – and hope the key local attraction, officially known as Siguniangshan Scenic Spot, is easier to enjoy than it is to pronounce.

The decision by Beijing to open up to British (and Canadian) passport holders will be transformative. Now that the barricade of red tape has been dismantled, organised cultural tours will continue in much the same way – but China will see a surge in backpackers, keen to explore a low-cost country that until this week was too tricky and expensive to consider. No hidden extras, either: on my last trip to the Chinese resort city of Qingdao, the Sea View Garden Hotel instructed guests: “Your satisfaction is the greatest praise to us, please don’t give tips to our staff.” I recall no sign like that along Isolation Row at Heathrow.

As China eases its rules for British visitors, the red tape for travellers to the UK is getting ever more tangled. From next Wednesday, 25 February, the electronic travel authorisation will be mandatory for all travellers arriving in the United Kingdom except for British and Irish citizens. For UK dual nationals who only have a passport issued by another country, this presents a problem. They are not allowed to apply for an ETA.

Up to now, the government has insisted that only a valid British passport or a “Certificate of Entitlement” costing £589 will allow a dual citizen to be admitted. The change has caused consternation for many people who happen to have UK citizenship but whose lives – and passports – are located elsewhere. They are scrabbling to acquire the required documentation. But this morning it has emerged that airlines can accept a valid foreign passport plus a UK passport that was issued anything up to 37 years ago in lieu of a current British passport.

I advise all travellers to observe all border regulations at all times. But I suspect that some of the 1.2 million UK dual nationals estimated to be resident abroad will still travel on ETAs, even though they are not supposed to apply for them. They will bet that airlines and ferry firms – the organisations with the hapless task of enforcing the new rules – will be content with proof that the passenger possesses a valid passport and apparently legitimate ETA. In a time-pressured pre-departure environment, if the computer says “yes” when presented with the traveller’s foreign passport, the transport operators will not diligently go on to investigate whether that person has British citizenship by birth or descent.

I cannot envisage any passenger being told: “You can’t enter the UK because you are British.” A few transgressors may be identified on arrival when a UK Border Force officer chooses to examine their passport. But most people who decide to infringe the rules will probably get away with it by whizzing through the eGates.

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Saracens were relegated from the Premiership at the end of the 2019–20 season following persistent salary cap breaches, bringing more adversity for Itoje to contend with.

Having won three Champions Cups and four Premiership titles by the age of 25, his decision to remain loyal and help the club return to the top of English rugby could have affected his England career.

He was named in reports as one of the players whose business ventures with Saracens owner Nigel Wray fell foul of rules restricting spending on players – something he was not aware of.

He remained a regular for England in 2020–21, while also playing a key role in Saracens’ victories over Ealing Trailfinders to secure promotion from the Championship.

Despite playing considerably less rugby, Itoje was selected again for the Lions in 2021 and impressed, being named the team’s player of the series in a 2–1 defeat in South Africa. The risk had paid off.

In 2023, an underlying health issue during the Six Nations led to some below-par performances from Itoje.

“I had something structurally wrong and I didn’t know it was structurally wrong until I was quite deep into it,” he said.

“To be able to persevere through that period and finally get a fix for that was great.”

As he had four years earlier, Itoje rediscovered his form to help England finish third at the 2023 World Cup.

“I have had a silver and bronze medal, I am desperate for a gold and I think we are capable of achieving that,” he said.

“It is a dream to play in a World Cup and win one.”

Thai police went undercover in a traditional lion costume in order to get close enough to a serial burglar to pounce on them and arrest them.

Footage released by the Bangkok police department shows officers dressed in a red-and-gold lion costume dancing towards the suspect as he walked through a Lunar New Year fair on Wednesday.

The officer wearing the lion’s papier-mache head then leaps at the suspect and quickly pins him to the ground at the temple in Nonthaburi, a province covering part of the Bangkok conurbation.

Police said the suspect, a 33-year-old man, is accused of breaking into the home of a local police commander in Bangkok three times earlier this month.

He is suspected of making off with valuables worth around 2 million baht (£47,700).

Police said they had attempted to arrest the man several times, but he had spotted the officers sent after him and run off.

They later identified him by tracing stolen amulets he had sold and learned he frequently visited temples in Nonthaburi.

Lion dancers are often part of the Lunar New Year, and the custom allowed the officers to go undercover for the operation.

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Police said the suspect confessed to the burglaries, saying he stole to buy drugs and gamble.

The force said he had previously been convicted of drug-related offences and burglary.

DUBAI, United Arab Emirates (AP) — Saudi Arabia could have some form of uranium enrichment within the kingdom under a proposed nuclear deal with the United States, congressional documents and an arms control group suggest, raising proliferation concerns as an atomic standoff between Iran and America continues.

U.S. Presidents Donald Trump and Joe Biden both tried to reach a nuclear deal with the kingdom to share American technology. Nonproliferation experts warn any spinning centrifuges within Saudi Arabia could open the door to a possible weapons program for the kingdom, something its assertive crown prince has suggested he could pursue if Tehran obtains an atomic bomb.

Already, Saudi Arabia and nuclear-armed Pakistan signed a mutual defense pact last year after Israel launched an attack on Qatar targeting Hamas officials. Pakistan’s defense minister then said his nation’s nuclear program “will be made available” to Saudi Arabia if needed, something seen as a warning for Israel, long believed to be the Middle East’s only nuclear-armed state.

“Nuclear cooperation can be a positive mechanism for upholding nonproliferation norms and increasing transparency, but the devil is in the details,” wrote Kelsey Davenport, the director for nonproliferation policy at the Washington-based Arms Control Association.

The documents raise “concerns that the Trump administration has not carefully considered the proliferation risks posed by its proposed nuclear cooperation agreement with Saudi Arabia or the precedent this agreement may set.”

Saudi Arabia did not immediately respond to questions Friday from The Associated Press

Congressional report outlines possible deal

The congressional document, also seen by the AP, shows the Trump administration aims to reach 20 nuclear business deals with nations around the world, including Saudi Arabia. The deal with Saudi Arabia could be worth billions of dollars, it adds.

The document contends that reaching a deal with the kingdom “will advance the national security interests of the United States, breaking with the failed policies of inaction and indecision that our competitors have capitalized on to disadvantage American industry and diminish the United States standing globally in this critical sector.” China, France, Russia and South Korea are among the leading nations that sell nuclear power plant technology abroad.

The draft deal would see America and Saudi Arabia enter safeguard deals with the International Atomic Energy Agency, the United Nations’ nuclear watchdog. That would include oversight of the “most proliferation-sensitive areas of potential nuclear cooperation,” it added. It listed enrichment, fuel fabrication and reprocessing as potential areas.

The IAEA, based in Vienna, did not immediately respond to questions. Saudi Arabia is a member state to the IAEA, which promotes peaceful nuclear work but also inspects nations to ensure they don’t have clandestine atomic weapons programs.

“This suggests that once the bilateral safeguards agreement is in place, it will open the door for Saudi Arabia to acquire uranium enrichment technology or capabilities — possibly even from the United States,” Davenport wrote. “Even with restrictions and limits, it seems likely that Saudi Arabia will have a path to some type of uranium enrichment or access to knowledge about enrichment.”

Enrichment isn’t an automatic path to a nuclear weapon — a nation also must master other steps including the use of synchronized high explosives, for instance. But it does open the door to weaponization, which has fueled the concerns of the West over Iran’s program.

The United Arab Emirates, a neighbor to Saudi Arabia, signed what is referred to as a “123 agreement” with the U.S. to build its Barakah nuclear power plant with South Korean assistance. But the UAE did so without seeking enrichment, something nonproliferation experts have held up as the “gold standard” for nations wanting atomic power.

Saudi-US proposal comes amid Iran tensions

The push for a Saudi-U.S. deal comes as Trump threatens military action against Iran if it doesn’t reach a deal over its nuclear program. The Trump military push follows nationwide protests in Iran that saw its theocratic government launch a bloody crackdown on dissent that killed thousands and saw tens of thousands more reportedly detained.

In Iran’s case, it long has insisted its nuclear enrichment program is peaceful. However, the West and the IAEA say Iran had an organized military nuclear program up until 2003. Tehran also had been enriching uranium up to 60% purity, a short, technical step from weapons-grade levels of 90% — making it the only country in the world to do so without a weapons program.

Iranian diplomats long have pointed to 86-year-old Supreme Leader Ayatollah Ali Khamenei’s comments as a binding fatwa, or religious edict, that Iran won’t build an atomic bomb. However, Iranian officials increasingly have made the threat they could seek the bomb as tensions have risen with the U.S.

Saudi Crown Prince Mohammed bin Salman, the kingdom’s day-to-day ruler, has said if Iran obtains the bomb, “we will have to get one.”

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The Associated Press receives support for nuclear security coverage from the Carnegie Corporation of New York and Outrider Foundation. The AP is solely responsible for all content.