Protecting Your Joints as You Age: A Nutritional Blueprint

The uncomfortable truth is that most modern diets are actively destroying joint tissue whilst giving the body almost nothing to repair it with. Joint pain, stiffness, and reduced mobility aren't inevitable consequences of ageing. They're consequences of nutritional neglect.

Your joints are built from food

Your joints are not static structures that slowly wear out like old machinery. They're living tissue that's constantly being broken down and rebuilt. The rebuilding process depends entirely on whether you're providing the raw materials.

Cartilage, the tissue that cushions your joints, is made from collagen and proteoglycans. Collagen is a protein that makes up roughly 75% of cartilage's dry weight.¹ Bone underlying the cartilage is made from collagen as well, combined with mineral content. Tendons and ligaments are collagen structures.

Without adequate collagen intake and the nutrients required to synthesise collagen, your body cannot repair cartilage damage. It cannot build resilient joint tissue. Instead, cartilage gradually degrades whilst the body runs a losing game of repair versus destruction. This is arthritis. This is joint degeneration. And it's preventable through nutrition.

Joint health is built from the inside out. You cannot exercise your way out of poor joint nutrition. You have to eat your way to healthy joints.

Collagen is the structure of cartilage

Collagen is the most abundant protein in the human body. It makes up roughly 30% of total body protein. It's the structural component of skin, bones, cartilage, tendons, and ligaments.

When you consume collagen from food sources like bone broth, animal skin, and gelatinous cuts of meat, you're providing your body with the raw materials to maintain and repair your own collagen structures. This includes the cartilage in your joints.

Collagen degradation accelerates with age and with chronic inflammation. Reducing inflammation and providing adequate collagen intake are the two levers that slow degradation and allow repair.

The richest collagen sources are bone broth, skin-on animal products, gelatinous cuts of meat like oxtail and beef cheeks, and organ meats. Fish skin and fish collagen are also valuable sources. Plant sources contain no collagen.

Glycine and joint repair

Glycine is one of the three amino acids that make up collagen. When your body builds new collagen, it uses glycine extensively. Glycine is also the most abundant amino acid in collagen itself, making up roughly 30% of collagen's amino acid composition.²

Glycine also functions as an anti-inflammatory neurotransmitter. It signals the immune system to calm down. Joint inflammation often improves when glycine intake is increased.

Glycine is found predominantly in bone broth, gelatinous cuts of meat, and connective tissues. Muscle meat contains some glycine, but the richest sources are the parts people typically discard. Bone broth is an efficient way to concentrate and consume large quantities of glycine.

Consuming bone broth regularly, or eating collagen-rich gelatinous cuts of meat, provides the glycine your body needs to build and repair joint tissue.

Vitamin C and collagen synthesis

Vitamin C is a critical cofactor in collagen synthesis. Your body cannot manufacture collagen without adequate vitamin C.³ When vitamin C is deficient, collagen production falters. Joint tissue cannot repair itself.

Vitamin C is found predominantly in plant foods, particularly citrus fruits, berries, and cruciferous vegetables. Animal products contain small amounts of vitamin C, particularly organ meats and meat from animals fed on varied diets.

Most people consuming a diet heavy in processed foods are low on vitamin C, even if they don't have scurvy. The amount of vitamin C needed for optimal collagen synthesis is higher than the amount needed to prevent deficiency disease. Consider your vitamin C intake a significant lever for joint health.

Add citrus, berries, and coloured vegetables regularly to your diet. Liver provides some vitamin C alongside collagen and glycine. The combination of collagen intake plus vitamin C intake is what allows your joints to rebuild.

Glucosamine and cartilage resilience

Glucosamine is an amino sugar that's a major structural component of cartilage. It's synthesised in the body from glucose and glutamine, but synthesis may not keep pace with demand, particularly in people with chronic inflammation or cartilage damage.

Glucosamine supplementation has shown efficacy in some research for reducing joint pain and slowing cartilage degradation, though results are mixed.⁴ The theory is solid: provide the body with glucosamine and it can build more resilient cartilage. The evidence on supplementation is modest but positive.

Glucosamine is found in cartilage and bone broth. Shellfish cartilage is a reasonable source. But the amount of glucosamine in food sources is often smaller than supplemental doses used in research.

If you're dealing with joint pain or trying to prevent cartilage degradation, glucosamine supplementation combined with collagen and vitamin C often produces better results than any single intervention.

Bone broth as joint medicine

Bone broth is not a miracle cure, but it's close to the highest leverage food for joint health. It contains collagen, glycine, glucosamine, and other compounds that support joint tissue health and reduce inflammation.

Making bone broth is straightforward. Simmer bones (beef, chicken, fish) with water, a bit of acid like vinegar or lemon juice, and a few herbs for 12-24 hours. The long slow cooking breaks down collagen into gelatin and releases minerals and amino acids into the liquid.

If you don't want to make bone broth, high quality commercial bone broth is available. Aim for broth made from bones of pastured animals when possible. Consume it regularly, either as a warm drink or as a base for soups or gravies.

Combined with adequate vitamin C intake and movement that strengthens the tissues around the joints, regular bone broth consumption often produces noticeable improvements in joint comfort and mobility.

The anti-inflammatory foundation

Joint inflammation is both a symptom of cartilage degradation and a cause of further degradation. Reducing systemic inflammation is essential for joint health.

This means removing foods that drive inflammation. Seed oils, processed foods, excessive sugar, and in some people, gluten and dairy. It means adding foods that reduce inflammation. Fatty fish, organ meats, colourful vegetables, herbs like turmeric.

It also means addressing chronic stress and poor sleep, both of which drive inflammation systemically. Movement and exercise, done at an intensity that doesn't cause pain, reduce inflammation and build the muscles and tendons that support the joints.

Joint health is inseparable from broader metabolic health. A body in a chronic inflammatory state will not maintain healthy joints no matter how much bone broth you consume. A body that's generally healthy, moving well, and eating anti-inflammatory foods can maintain and rebuild joint tissue effectively.

Movement, nutrition, and joint longevity

Nutrition is one part of the joint health equation. Movement is equally critical. Joints need regular use to maintain their integrity. They need strength in the surrounding muscles to reduce stress on the cartilage itself.

The movement doesn't need to be intense or extreme. Regular walking, swimming, strength training, or any activity that uses the joints without causing pain is valuable. The key is consistency and avoiding extreme impacts or loads when joints are already compromised.

For people with existing joint damage, the combination of anti-inflammatory nutrition, adequate collagen and vitamin C intake, careful movement, and adequate recovery often produces measurable improvements in comfort and function over weeks and months.

The bottom line

Your joints today depend on the decisions you made months and years ago. Your joints in thirty years depend on the decisions you're making now. Joint health is not inevitable age-related decline. It's a consequence of either building and maintaining joint tissue or allowing it to degrade.

Eat bone broth. Consume collagen-rich foods. Ensure adequate vitamin C intake. Reduce systemic inflammation. Move regularly. These aren't complicated interventions. They're foundational. And they're extraordinarily effective at preserving joint health and mobility into advanced age.

If your joints are currently painful, start with anti-inflammatory food, bone broth, and glucosamine supplementation. Most people notice improvement within weeks once they've removed inflammatory foods and are consistently consuming collagen and vitamin C.

Your joints were built to last. Give them what they need to function well for decades to come.

References

1. 1. Sophia Fox AJ, Bedi A, Rodeo SA. The basic science of articular cartilage. Sports Health. https://pmc.ncbi.nlm.nih.gov/articles/PMC3445147/ [accessed May 2026].
2. 2. Razak MA, Begum PS, Viswanath B, Rajagopal S. Multifarious Beneficial Effect of Nonessential Amino Acid, Glycine: A Review. https://pmc.ncbi.nlm.nih.gov/articles/PMC5350494/ [accessed May 2026].
3. 3. National Institutes of Health, Office of Dietary Supplements. Vitamin C - Health Professional Fact Sheet. https://ods.od.nih.gov/factsheets/VitaminC-HealthProfessional/ [accessed May 2026].
4. 4. Towheed TE, Maxwell L, Anastassiades TP, et al. Glucosamine therapy for treating osteoarthritis. Cochrane Database. https://pubmed.ncbi.nlm.nih.gov/15846645/ [accessed May 2026].