Are peptide creams REALLY worth it? Experts reveal what they can do for sagging skin –

Peptides have become one of the most hyped ingredients in skincare, appearing in everything from £15 serums to designer creams costing hundreds of pounds – and if you have been left wondering what they actually are, you are not alone.

Put simply, peptides are tiny chains of different amino acids – the building blocks that make up proteins in the body – and there is an almost limitless number of possible combinations.

Scientists have identified more than 7,000 bioactive peptides that occur naturally in the body, each of which helps regulate essential functions including muscle growth and repair, hormone regulation and inflammation.

Peptides also play important roles elsewhere in the body, including in blood sugar control and appetite regulation. In fact, weight-loss injections such as Wegovy and Mounjaro are based on synthetic peptides designed to mimic hormones involved in hunger and blood sugar control.

In skincare, certain peptides send signals to skin cells to repair, strengthen or renew themselves. 

Some encourage the skin to make more collagen and elastin – the proteins that help keep skin firm, smooth and springy. Others may help calm inflammation, support the skin barrier, improve the look of redness and reduce pigmentation.

But unlike retinol, a concentrated form of Vitamin A which speeds up skin cell turnover, peptides tend to work more gradually. They are not an instant tightening treatment and need to be used regularly to have any visible effect.

They are also big business. Figures from Mordor Intelligence estimate that the UK market for cosmetic peptides – the raw ingredients used in peptide skincare – will be worth around £194 million in 2026, while the wider UK facial skincare market is worth more than £3.59 billion.

So can peptides really tighten sagging skin – or are shoppers simply being sold an expensive dream?

According to Alexandra Mills, a specialist aesthetics nurse who works out of her own London clinic, A.M Aesthetics, peptides can play a useful role in supporting ageing skin. 

They do this by targeting fibroblasts, the cells involved in producing collagen, elastin and hyaluronic acid.

‘In skincare, they are being studied and used because they may help tackle common signs of ageing, such as loss of firmness, fine lines and uneven skin tone,’ she tells the Daily Mail.

‘Experts also believe they could have wider medical uses in dermatology in the future.’

The peptides currently on the market can be plant-derived, naturally derived from animals – for instance, from sheep’s placenta – or synthetic, meaning they are made in a lab.

Mills says the latter are often considered the safest because they can be carefully designed, tested and formulated to target a specific skin concern.

There are also neuropeptides, which are tiny protein-like molecules involved in sending signals between nerve cells. In skincare, these are usually used in products that claim to soften the appearance of facial expression lines.

However, they are not the same as Botox – which causes temporary muscle paralysis – and should not be expected to produce the same freezing or smoothing effect.

‘Most peptides work by attaching to receptors on the surface of skin cells and sending them instructions,’ Mills explains.

‘Different peptides do different jobs. Some act as messengers, telling the skin to repair or renew itself. Others help deliver ingredients or affect blood flow and inflammation in the skin.

‘Others block certain enzymes that trigger melanin production, which can help slow down or prevent dark skin patches, known as melasma or age spots.’

However, Mills says peptides are not a quick fix and need to be used consistently to see results.

‘Peptides can come in different strengths, depending on the formula and what the product is designed to do,’ she says.

‘How quickly they work really depends on the type of peptide being used, the dose, the skin concern being targeted and how severe the issue is.

‘More complex concerns, such as ageing, will usually take longer to improve.’

With a glut of high-strength beauty products already sitting in many bathroom cabinets – and ‘SkinTok’ videos convincing many of us we are amateur dermatologists – it is important to know how and when to add peptides to your routine.

Many of us are layering actives, acids, exfoliators and emollients at home, often with little idea of what should – and should not – be used together.

And while peptides are generally less likely to trigger irritation than retinol or strong acids, it is still wise not to go all in straight away.

‘People with sensitive skin should be cautious with any peptide product and should always patch test first,’ adds Mills.

‘They can irritate the skin if they are used too often or at too high a strength.’

So where do peptides fit in, and how can you avoid irritating your skin by combining the wrong products?

‘Peptides are classed as active ingredients, but they are not the same as retinol,’ says Prof Syed Haq, consultant physician and anti-ageing expert.

‘I would be careful about combining peptides with too many strong active ingredients at once, particularly high-dose Vitamin C, retinoids and strong acids such as glycolic or salicylic acid.

‘The alcohol and fragrance used in certain products can also increase the risk of irritation, especially in sensitive skin.’

And just because peptides have the potential to be transformative, that does not mean you should lather them all on at once.

‘Using lots of different peptide products together is not always better either,’ adds Prof Haq. ‘In some cases, they may work against each other and reduce the effect you are trying to achieve.’

Whether a peptide serum gets into the skin also depends largely on the size of the molecule.

‘The smaller the peptide, the more easily it can penetrate the skin,’ Prof Haq explains.

‘Some peptides can pass through the epidermis, the outer layer of the skin, and potentially reach deeper layers such as the dermis.’

The delivery system also matters as much as the formulation itself.

Liposomes and nanosomes are tiny bubble-like carriers that hold active ingredients and help them absorb more effectively, while hydrogels are water-rich gels that can keep the skin hydrated and release ingredients gradually.

Prof Haq adds that having peptides administered as part of a microneedling treatment ‘may also improve penetration.’

Thankfully, peptide skincare does not need to come with a luxury price tag or be administered in a clinic to be effective, and there are currently scores of peptide skincare ranges available in the UK, from affordable high-street serums to premium creams costing well over £100.

At the budget end, priced at around £10 to £20, brands such as The Ordinary sell simple multi-peptide serums designed to support hydration, boost the skin barrier and tackle early signs of ageing.

Mid-range products, usually priced between £20 and £50, tend to contain more specialised ingredients, such as copper peptides or targeted anti-wrinkle blends.

And at the luxury end, brands like Medik8, Murad, Lab 31b and Perricone MD – hose products cost anywhere from £50 to over £175 – offer more advanced peptide blends, neuropeptides and delivery systems designed to help ingredients penetrate the skin more effectively.

But experts say price alone is not a reliable guide to how well a peptide product will work – it comes down to what your skin needs, both on the inside and out.