Do Collagen Supplements Really Work?

If social media is anything to go by, collagen has become the must-have supplement for glowing skin, healthy joints and ageing well. Powders, drinks, sachets and gummies promise smoother skin, stronger nails and fewer aches and pains—but do collagen supplements really live up to the hype?

Like most things in nutrition, the answer isn't quite as simple as the marketing might suggest.

Collagen is undoubtedly important for our health, but before spending a small fortune on supplements, it's worth understanding what collagen actually is, what happens as we age and, most importantly, how to support your body's natural collagen production.

What is collagen?

Collagen is the most abundant protein in the body and forms the framework of our connective tissues.

It's found almost everywhere—from your skin and muscles to your bones, tendons, ligaments, blood vessels and even your gut. Think of collagen as the scaffolding that gives your body strength, structure and flexibility.

Alongside elastin, collagen helps keep skin firm, smooth and supple, while also supporting healthy joints and allowing us to move comfortably.

In other words, collagen isn't just about looking younger. It's essential for keeping your whole body functioning well.

Why does collagen decline with age?

Unfortunately, our natural collagen production starts to slow surprisingly early.

From our mid-twenties onwards, we produce around 1% less collagen each year. Over time, this gradual decline may contribute to:

• Changes in skin texture and firmness

• Fine lines and wrinkles

• Stiffer joints

• Slower recovery after exercise

• Reduced resilience in connective tissues

This natural decline is one of the reasons collagen supplements have become so popular. While there is some promising evidence that certain collagen supplements may support skin elasticity and joint health, they're certainly not a magic fix.

The foundations of good nutrition and lifestyle will always come first.

The different types of collagen

There are many different forms of collagen throughout the body, but three are particularly important.

Type I collagen

This accounts for around 90% of the collagen in the body and is found mainly in the skin, bones and tendons. It provides strength, firmness and structure.

Type II collagen

Type II collagen is found primarily in cartilage, where it cushions joints and helps movement remain smooth and comfortable.

Type III collagen

This type supports soft tissues including muscles, blood vessels and skin, helping maintain flexibility and elasticity.

Before buying supplements, start with the basics

If your diet and lifestyle aren't supporting collagen production, expensive supplements are unlikely to deliver the results you're hoping for.

Your body still needs the right raw materials to build, repair and protect connective tissue.

Here are the habits I recommend focusing on first.

Eat enough protein

Collagen is made from amino acids, so eating enough protein is essential.

Aim to include a good-quality source of protein with each meal. Great choices include eggs, fish, chicken, lean meat, Greek or natural yoghurt, cheese, tofu, nuts and seeds.

Include collagen-rich foods

Some foods naturally contain collagen, including:

• Bone broth

• Gelatine

• Chicken skin

• Tinned fish with edible bones, such as sardines

• Liver

It's worth remembering that when we eat collagen-rich foods, our digestive system breaks the collagen down into individual amino acids. We don't absorb whole collagen directly, but these amino acids provide valuable building blocks that your body can use wherever they're needed.

Eat plenty of colourful fruit and vegetables

Antioxidants help protect collagen-rich tissues from damage caused by everyday wear and tear.

Fill your plate with colourful seasonal fruit and vegetables, along with herbs, spices, green tea and foods rich in natural plant compounds such as cacao.

Stay well hydrated

Water helps keep tissues hydrated and supple.

Aim to drink water regularly throughout the day and include herbal teas if you enjoy them.

Prioritise omega-3 fats

Omega-3 fats help support healthy cell membranes and may help protect the collagen matrix that keeps tissues flexible.

Aim to include oily fish such as salmon, sardines, mackerel, trout or herring two or three times each week.

Fresh, frozen and tinned all count. Where possible, choose sustainably sourced fish by looking for the Marine Stewardship Council (MSC) blue label.

Protect your collagen every day

Your lifestyle has a significant impact on collagen health too.

Try to:

• Keep added sugar to a minimum.

• Avoid smoking.

• Limit alcohol.

• Get enough sleep.

• Manage stress where possible.

• Protect your skin from excessive UV exposure.

• Stay active to maintain strong muscles, joints and connective tissues.

These everyday habits do far more for healthy ageing than any supplement can achieve on its own.

What about supplements?

Once you've built strong foundations, collagen supplements may have a place for some people.

If you decide to try one, there are a few things worth looking out for.

Choose a supplement that contains hydrolysed collagen (sometimes called collagen peptides). This means the collagen has already been broken down into smaller peptides, making it easier to digest.

Look for products that also include vitamin C, as vitamin C is essential for collagen production within the body.

I'd also recommend avoiding collagen gummies. They are often high in sugar and may contain relatively small amounts of active collagen compared with powders or capsules.

Finally, remember that most collagen supplements are made from animal sources such as fish or bovine collagen, so they may not be suitable if you're vegetarian, vegan or have certain allergies.

Don't forget the nutrients your body already needs

Before adding collagen to your supplement cupboard, it's worth checking whether you've covered the basics.

Vitamin C is essential for collagen formation, while omega-3 fats support healthy skin and connective tissue. A good-quality multivitamin can also help provide the nutrients needed for normal repair, maintenance and cell renewal.

These nutrients work alongside your body's natural collagen production rather than trying to replace it.

The bottom line

Collagen is an incredibly important protein that supports healthy skin, joints, muscles, bones and connective tissues throughout the body.

Although collagen supplements may offer benefits for some people, they should never replace the fundamentals of good nutrition and healthy living.

The best investment you can make is eating enough protein, filling your plate with colourful fruit and vegetables, including healthy fats, staying active, getting enough sleep and protecting your skin from sun damage.

Once those foundations are in place, collagen supplements may provide an extra helping hand—but they are exactly that: a supplement, not a substitute for a healthy lifestyle.

About the author:
Jane McClenaghan is renowned for her down-to-earth, evidence-based approach to nutrition, making healthy eating practical and achievable for everyone.

With over 25 years of experience delivering group sessions for corporate clients and one-to-one consultations, she specialises in women’s health and has helped thousands of people transform their wellbeing through better nutrition.

As the author of two best-selling books and a familiar voice on local radio, Jane is passionate about translating the science of nutrition into real food on your plate and empowering others to make lasting, positive changes for their health.

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