Introduction
Collagen is commonly called the body’s natural "building block" because it gives strength, structure, and elasticity to many tissues. It is the most abundant protein in the body, accounting for nearly one-third of the total protein. Collagen is present in the skin, bones, cartilage, tendons, ligaments, muscles, blood vessels and connective tissues where it helps preserve structural integrity and support normal function.
As children and young adults, our bodies naturally produce enough collagen to repair and regenerate tissues. However, collagen production begins to slowly decline after the age of 25. Factors that can speed up the breakdown of collagen include ageing, long-term exposure to the sun, smoking, poor nutrition, chronic stress, lack of sleep and environmental pollution. This loss may show up as visible signs of ageing such as wrinkles, loss of skin firmness, brittle nails, thinning hair, joint pain and loss of bone strength
Collagen supplements, also known as 'collagen peptides', have become increasingly popular for combating age-related collagen loss. These supplements are formulated to provide highly bioavailable collagen fragments to help support the body’s natural collagen synthesis and support healthy skin, joints, bones and connective tissue.
In this blog, we will discuss what collagen peptides are, how they function in the body, the various types of collagens, natural sources of collagen, symptoms of collagen loss, their health benefits, and practical tips for choosing a quality collagen supplement.
Understanding Collagen Peptides
Collagen peptides are the small absorbable pieces of collagen protein. Collagen is a natural protein structure in the human body. Collagen is important for the body to keep skin firm, joints flexible and hair and nails strong. The collagen from food or supplements is natural, full-size collagen, and is too large for us to digest efficiently. To make it more digestible, it is broken down into smaller pieces called 'peptides', which are easier for the body to absorb and utilise. The peptides signal to the body when it needs more collagen and the body produces new collagen tissue. In short, collagen peptides are an easy way to give your body the building blocks it needs to keep your skin, joints and overall strength healthy.
The Process of Collagen Absorption
The collagen peptide journey begins in the digestive system. When they reach the stomach, enzymes work on them, breaking them down into smaller pieces. From the stomach, they pass into the intestine where their smaller size is an advantage. Then, the small fragments enter the bloodstream and distribute themselves throughout the body. The fragments touch the skin where the cells use them to create collagen fibres. The collagen fibres produced in this way improve the skin's firmness and elasticity. Some migrate to the joints, where they produce cartilage tissue and keep the joints flexible and the bones healthy.
Types of Collagen
Collagen is the most abundant protein in the human body, and there are 28 different kinds of it. There are four main types[1]:
-
Type I: The most common form of collagen; flexible but strong, it gives resistance to force, tension and stretch. It exists in all connective tissue and particularly in scar tissue, tendons, ligaments, bone, cornea, and skin.
-
Type II: Provides pressure resistance, located in articular and hyaline cartilage of joints and intervertebral discs.
-
Type III: Provides a flexible meshwork for cellular support, the principal component of reticular fibres, often found in organs such as the skin and blood vessels. Also abundant in the early stages of wound healing and participating in the formation of granulation tissue.
-
Type IV: Forms a meshwork that provides support and attachment to the underlying extracellular matrix forming the basal lamina of the basement membrane, an essential component of the kidneys, inner ear, and eye lens.
Symptoms of Collagen Loss
Research shows that collagen production decreases every year as we age, and this reduction may speed up during menopause because of hormonal changes. In addition to age, other lifestyle and environmental factors that can accelerate collagen breakdown include excessive sun exposure, smoking, poor nutrition, stress and lack of sleep.
With declining collagen levels in the body, connective tissues progressively weaken and lose strength, elasticity and resilience, causing visible changes to the skin, hair, and nails.
-
Fine Lines and Wrinkles: Fine lines and wrinkles are among the first and most visible signs of collagen loss. Reduced collagen means less structural support for the skin, making it thinner and less elastic.
-
Reduced Skin Elasticity: Healthy collagen keeps skin firm and elastic. As collagen decreases, the skin can start to sag, especially around the cheeks, jawline, and neck.
-
Dehydrated and Dull Skin: Collagen helps keep skin hydrated by supporting the skin barrier. Lower collagen levels can result in dryness, a rough texture, and a dull complexion.
-
Fragile Nails: Reduced collagen support in nail tissues can lead to weak, thin, or easily splitting nails.
-
Hair Thinning: Keratin is the main component of hair, while collagen supports the scalp and hair follicles. Less collagen may lead to weaker hair and increased hair thinning with age.
-
Stiff Joints: Cartilage is rich in collagen. Collagen loss could result in less cushioning inside joints which may cause stiffness and less flexibility.
-
Weak Bones: Collagen creates the framework that supports the mineralisation of our bones. Over time, less collagen may mean your bones become weaker.
Benefits of Collagen Peptides
Collagen peptides have gained popularity as they support various aspects of health by providing amino acids and bioactive peptides involved in collagen production. [3]
Encourages Healthy Skin:
Collagen is the main structural protein found in skin, responsible for firmness, elasticity and hydration. [4]
Research indicates that collagen peptide supplements provide the following benefits:
-
Enhances skin elasticity
-
Supports skin hydration
-
Reduces the appearance of fine lines and wrinkles
-
Encourages even skin tone
-
Promotes healthy skin
The benefits are due to fibroblast stimulation, which makes collagen and elastin.
Maintains Healthy Hair:
Healthy hair is dependent on a healthy scalp and adequate protein availability. Collagen peptides provide amino acids to make structural proteins and may help:
-
Support healthy hair follicle
-
Strengthen hair
-
Less hair breakage
-
Promote healthier hair
Strengthens Nails:
Ageing individuals often have fragile nails. New evidence suggests that collagen peptides may help:
-
Strengthen nails
-
Decrease brittleness
-
Accelerate nail growth
-
Reduce nail splitting
Promotes Joint Health:
Cartilage is mainly made of collagen, which gives it strength and flexibility. Collagen peptides may support:
-
Normal cartilage anatomy
-
Flexibility of joints
-
Easy movement
-
Post-exercise recovery
Helps Keep Bones Healthy:
Bone is composed of collagen, which forms the protein scaffold on which minerals and inorganic minerals are deposited. Collagen accounts for approximately one-third of the total composition of bone tissue. Collagen peptides support:
-
Solid bone structure
-
Bone strength
-
Muscle Recovery Support for Healthy Ageing
Collagen supplies the essential amino acids that are parts in the repair of connective tissue.
Promotes Overall Connective Tissue Health:
-
Collagen is present throughout the body in tendons, ligaments, blood vessels and connective tissue.
-
Adequate collagen may help keep these tissues strong and intact.
Sources of Collagen
Foods containing collagen
You can also load up on collagen from foods such as tough cuts of meat, which are packed with connective tissue like pot roast, brisket and chuck steak. However, a healthy and environment-friendly diet in the long run does not recommend high consumption of red meat. Collagen is also present in the bones and skin of fresh and saltwater fish.
Bone broth, a trendy food that is a staple on soup aisles, is a food full of collagen. The process involves simmering animal bones in water and a little vinegar (to help dissolve the bones and release collagen and minerals) for anywhere from 4 to 24 hours. However, the amount of amino acids will differ from batch to batch depending on the bones used, how long they are cooked and how much it's processed (eg. if it's a packaged/canned version).
Gelatin is a form of collagen, produced by boiling animal bones, cartilage and skin for many hours and letting the liquid cool and set. These connective tissues are broken down to produce gelatin. Some diets, such as the paleo diet, promote eating collagen and gelatin. [2]
Foods that increase collagen production
Many high-protein foods are believed to help the body produce collagen because they contain the amino acids that are in collagen: glycine, proline, and hydroxyproline. These include fish, poultry, meat, eggs, dairy, legumes and soy. Nutrients that help with collagen production include zinc (found in shellfish, legumes, meats, nuts, seeds and whole grains) and vitamin C (found in citrus fruits, berries, leafy greens, bell peppers and tomatoes). [2]
Healthy Lifestyle Habits That May Help
In addition to a healthy and balanced diet, here are some habits that may help your body’s natural collagen:
-
Apply sunscreen or limit direct sunlight exposure.
-
Sleep well for an average of 7 to 9 hours.
-
Avoid smoking or being around people who smoke.
-
Stress management.
-
Regular exercise.
Conclusion
Collagen is the body’s most plentiful structural protein and plays a vital role in keeping skin, joints, bones, muscles and connective tissues healthy. As you get older, your body makes less collagen naturally, and this can cause visible changes like wrinkles, loss of skin elasticity, brittle nails, thinning hair and joint pain. Collagen peptides are highly bioavailable, which means they provide amino acids and bioactive peptides that help the body build collagen naturally. When used with a balanced diet high in protein, vitamin C, zinc and copper, healthy lifestyle habits and a high-quality collagen peptide supplement when appropriate, they can help support healthy ageing and overall wellness. While collagen peptides are not a substitute for a healthy diet or medical care, they may be a helpful addition to a comprehensive approach for supporting healthy skin, connective tissues and musculoskeletal health over time.
Frequently Asked Questions (FAQs)
1. What are collagen peptides?
Collagen peptides are smaller pieces of collagen protein that have been hydrolysed so the body can digest and absorb them more easily than native collagen.
2. Which collagen is best for skin?
The main collagen in skin is Type I collagen, which helps keep skin firm and elastic. Marine collagen naturally contains a wealth of Type I collagen.
3. Can collagen peptides support joint health?
Collagen peptides may support the health of cartilage, joints and connective tissue generally as part of a healthy lifestyle and balanced diet.
4. Are collagen peptides safe?
Collagen peptide supplements are generally considered safe for most healthy adults when used as directed by the manufacturer. Those with allergies to the collagen source or certain medical conditions should consult a healthcare professional.
5. Does diet help to maintain collagen?
Yes. Eating enough protein, vitamin C fruit and vegetables and foods rich in zinc and copper helps the body make collagen naturally.
References: