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Collagen and its Benefits to your Skin, Hair, Nails & More

Written by healthwords.ai's team of doctors and pharmacists based in UK | Updated: 25 Sep 2025 | 5 min read

Collagen is a protein that is very important for your body. It helps keep your skin, hair, nails, muscles, and joints strong and flexible. As you get older, your body makes less collagen, which can lead to wrinkles, thinner hair, and joint pain.

Many people use collagen supplements and beauty products, hoping to look younger and feel better. This article explains what collagen is, how it works, the different types, and whether supplements really help. It also shares natural ways to boost your body’s collagen and clears up common myths.

What Is Collagen?

Collagen is a protein that acts like a scaffold, giving shape and strength to your skin, hair, nails, muscles, and joints. About 75% of your skin’s dry weight is collagen, which helps keep it firm and prevents sagging.

There are several types of collagen, but the most important are Type I, Type II, and Type III. These types help build and keep your skin, bones, cartilage, and other tissues healthy. Your body starts making less collagen in your mid-20s, which is why you might notice more wrinkles or stiff joints as you get older.

Things like too much sun, smoking, and a poor diet can make your body lose collagen even faster. That’s why some people turn to collagen supplements and creams to try to replace what’s lost.

Benefits of Collagen for Skin

1. Anti-Ageing Effects

Collagen helps your skin stay elastic, which means fewer wrinkles and fine lines. Some studies show that taking collagen supplements can make your skin more hydrated, elastic, and smooth.

2. Hydration and Texture

Collagen helps your skin hold onto moisture. When collagen levels drop, your skin can get dry and rough. Collagen supplements may help keep your skin soft and less irritated.

3. Wound Healing

Collagen is essential for healing cuts and scrapes. It helps rebuild skin tissue and can make wounds heal faster. Sometimes doctors use special collagen dressings to help with healing.

4. What the Science Says

Research shows that collagen supplements can improve skin elasticity and hydration after several weeks. But the changes are usually small, and it’s not a miracle cure for ageing.

Collagen for Hair and Nails

1. Hair Strength and Thickness

Collagen helps make hair stronger and less likely to break. It also supports the scalp and hair follicles, which may help hair grow thicker. However, more research is needed to prove that collagen makes hair grow faster.

2. Nail Health

Collagen can help strengthen your nails, making them less likely to break or peel. Many people say their nails improve after taking collagen supplements.

3. Myths

Collagen can help with weak hair and nails, but it won’t cure hair loss caused by genetics.

Collagen and Joint Health

Collagen is a key part of the cartilage that cushions your joints. When you lose collagen, your joints can become stiff or painful, especially as you get older.

1. Joint Support and Pain Relief

Taking collagen supplements may help your joints move better and hurt less, especially if you have arthritis. Some people say their joints feel less stiff and more flexible after using collagen for a few months.

2. Protecting cartilage

Collagen helps keep the cartilage in your joints healthy. This can slow down problems like osteoarthritis, where cartilage wears away.

3. What the Science Says

Studies show that collagen supplements can reduce joint pain and help people with osteoarthritis move better. But they are not a replacement for medicine if you have a serious joint problem.

Types of Collagen

Type Where It’s Found What It Helps With

  • Type I skin, tendons, bones Skin firmness, bone strength
  • Type II Cartilage (joints) Joint health
  • Type III Skin, muscles, blood vessels Skin firmness, muscle tone

Collagen supplements usually come from cows (bovine) or fish (marine). Marine collagen is easier for your body to absorb, while bovine collagen has more Type I and III.

Do Collagen Supplements Work?

Research shows that oral collagen supplements can help your body make more collagen. People who take them for 8–12 weeks may notice firmer skin and fewer wrinkles, especially as they get older. You need to take them regularly for several months to see results.

Dosage: Most studies recommend 2.5 to 15 grams of collagen per day. Always follow the instructions on the package and ask a doctor if you’re not sure.

Food vs. Supplements: Foods like bone broth contain collagen, but supplements are usually stronger and more easily absorbed by your body. Eating a healthy diet with enough protein, vitamins, and minerals is also important for making collagen.

Natural Ways to Boost Collagen

  • Eat Vitamin C: Found in oranges, berries, and leafy greens, vitamin C helps your body make collagen.
  • Eat Protein: Foods like chicken, fish, eggs, and beans provide your body with the necessary nutrients to build collagen.
  • Eat Antioxidants: Blueberries and green tea protect collagen from damage.
  • Stay Hydrated: Drink plenty of water to keep your skin moist and healthy.
  • Protect from Sun: Wear sunscreen to prevent the sun's harmful rays from breaking down collagen in your skin.
  • Get Enough Sleep and Manage Stress: Good sleep and less stress help your body keep making collagen.

Myths About Collagen

  • Myth: Collagen Supplements Instantly Reverse Ageing
  • Fact: Collagen can help your skin look better, but it takes months to see changes, and they are usually small.
  • Myth: Collagen Creams Work as Well as Supplements
  • Fact: Collagen in creams can’t get through your skin. These creams mainly just moisturise.
  • Myth: Everyone Gets the Same Results
  • Fact: Individuals who have lost collagen due to ageing or health issues may experience greater benefits compared to younger individuals.

When to See a Doctor

If you have thinning skin, brittle nails, or joint pain, talk to a doctor. These can be signs of collagen deficiency or another health problem. A doctor can tell you if collagen supplements or other treatments might help.

Conclusion

Collagen is important for healthy skin, hair, nails, and joints. Supplements and creams can help, but results are usually slow and not dramatic. Eating healthy, staying hydrated, and protecting your skin from the sun are also important. If you have serious problems, always check with a doctor. Collagen can be a helpful part of your routine, but it’s not a magic fix.