Healthy Ageing, Immunosenescence & the Gut Microbiome: Supporting Immune Resilience Naturally

Discover how the gut microbiome, nutrition, protein intake and lifestyle habits influence immune resilience, healthy ageing and long-term wellbeing.

As life expectancy continues to increase, many people are asking a new question:

👉 How do we stay healthy, active and resilient as we age?

Scientists are increasingly discovering that healthy ageing is about much more than simply avoiding disease.

It involves maintaining:

• Muscle mass

• Mobility

• Cognitive function

• Digestive health

• Energy levels

• Immune resilience

One area receiving growing attention is the relationship between ageing, the gut microbiome and the immune system.

Researchers now recognise that age-related changes in the gut microbiome may influence many of the biological processes associated with ageing.

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What Is Immunosenescence?

Immunosenescence refers to the gradual age-related decline in immune function.

As we get older, the immune system naturally changes.

This may result in:

• Reduced immune responsiveness

• Slower recovery from illness

• Increased inflammation

• Reduced resilience to physical stress

While these changes are considered a normal part of ageing, researchers are investigating how lifestyle factors may influence the rate at which they occur.

The Gut Microbiome and Healthy Ageing

The gut microbiome refers to the trillions of bacteria, fungi and microorganisms that live primarily within the large intestine.

These microbes help support:

• Digestion

• Nutrient metabolism

• Immune regulation

• Gut barrier function

• Communication between the gut and brain

Over time, the composition of the microbiome naturally changes.

Research suggests that reduced microbial diversity may be associated with several age-related changes, including:

• Increased inflammation

• Digestive issues

• Reduced immune resilience

• Changes in metabolic health

For this reason, many scientists now consider gut health an important component of healthy ageing.

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The Connection Between Gut Health and Immunity

Approximately 70% of the immune system is associated with the gastrointestinal tract.

The gut acts as both:

• A physical barrier

• An immune training centre

A healthy gut microbiome helps regulate immune responses and supports communication between the digestive and immune systems.

When the microbiome becomes imbalanced, this may influence:

• Immune regulation

• Inflammatory responses

• Gut barrier function

Researchers continue to investigate how maintaining a healthy microbiome may contribute to long-term immune resilience.

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Inflammaging: The Hidden Challenge of Ageing

Another term gaining attention in longevity research is inflammaging.

Inflammaging describes the low-grade chronic inflammation that often develops with advancing age.

Unlike acute inflammation, which helps the body respond to injury or infection, chronic low-grade inflammation may influence multiple systems throughout the body.

Researchers have associated inflammaging with:

• Reduced physical function

• Metabolic changes

• Age-related health challenges

• Declining immune performance

The gut microbiome is increasingly viewed as one of the factors that may influence this process.

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Dysbiosis and Ageing

Dysbiosis refers to an imbalance within the gut microbiome.

This may occur when beneficial bacteria decrease or less desirable microbes become more dominant.

Potential contributors include:

• Low-fibre diets

• Ultra-processed foods

• Chronic stress

• Poor sleep

• Physical inactivity

• Certain medications

• Age-related changes

Supporting microbiome diversity is becoming a key focus in healthy ageing strategies.

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Can Probiotics Support Healthy Ageing?

As interest in healthy ageing grows, researchers are investigating the potential role of probiotics.

Probiotics are live microorganisms that may help support a balanced gut microbiome when consumed as part of a healthy diet.

Current research is exploring how probiotics may support:

• Digestive health

• Microbiome diversity

• Immune function

• Overall wellbeing

However, probiotics are only one piece of the puzzle.

The most important foundations remain:

✔ A diverse whole-food diet

✔ Plenty of vegetables

✔ Adequate fibre

✔ Fermented foods

✔ Regular physical activity

✔ Sufficient sleep

✔ Stress management

Probiotics work best when combined with these broader lifestyle habits.

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Why Protein Becomes More Important With Age

One of the biggest nutritional challenges of ageing is maintaining muscle mass.

After the age of 30, adults gradually begin to lose muscle tissue.

This process accelerates with age.

Maintaining adequate protein intake helps support:

• Muscle maintenance

• Recovery

• Strength

• Mobility

• Physical independence

Many experts now recommend paying greater attention to protein intake as we age.

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The Role of Resistance Training

Nutrition and exercise work together.

Protein provides the building blocks.

Resistance training provides the stimulus.

Together they help support:

• Strength

• Balance

• Functional movement

• Healthy ageing

Even modest resistance exercise can have significant benefits for long-term wellbeing.

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Where Bone Broth Fits

Bone broth has traditionally been consumed as a nourishing food across many cultures.

Bone broth provides:

• Naturally occurring protein

• Collagen-derived amino acids

• Minerals

• Rich savoury flavour

The amino acids found in bone broth, including glycine and proline, contribute to overall protein intake and complement other dietary protein sources.

Many people use bone broth as part of a whole-food approach to healthy ageing.

It can be enjoyed:

• As a warm drink

• In soups

• In stews

• In cooking

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Collagen Peptides and Healthy Ageing

Collagen production naturally declines with age.

For this reason, many people choose to incorporate collagen peptides into their daily routine.

Products such as:

• BC Beauty Healthy Glow

• BC Beauty Skinny Glow

provide collagen-derived protein that can contribute to overall daily protein intake as part of a balanced diet and active lifestyle.

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Nutrition Strategies for Healthy Immune Ageing

Simple habits often provide the greatest long-term benefits.

Focus on:

Eat More Plants

Aim for a diverse range of:

• Vegetables

• Fruit

• Herbs

• Spices

• Legumes

Prioritise Protein

Include quality protein at every meal.

Feed Your Microbiome

Consume:

• Fibre-rich foods

• Fermented foods

• Diverse plant foods

Stay Active

Regular movement supports both metabolic and immune health.

Sleep Well

Sleep is essential for recovery and immune regulation.

Manage Stress

Chronic stress can affect both the microbiome and immune system.

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The Gut-Brain-Immune Connection

The gut does not operate in isolation.

It constantly communicates with:

• The brain

• The immune system

• The endocrine system

This network is often referred to as the gut-brain-immune axis.

Maintaining a healthy microbiome may help support communication between these systems throughout life.

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Final Thoughts

Healthy ageing is about more than simply living longer.

It is about maintaining:

✔ Strength

✔ Mobility

✔ Energy

✔ Cognitive function

✔ Immune resilience

✔ Quality of life

Research continues to demonstrate that the gut microbiome plays an important role in many of these processes.

By focusing on nutrient-dense foods, adequate protein, regular exercise, quality sleep and gut health, you can help build the foundation for long-term wellbeing.

At Broth & Co, we believe healthy ageing begins with simple daily habits built around real food, consistent nutrition and sustainable lifestyle practices.

Because longevity isn't just about adding years to life—it's about adding life to those years.

Frequently Asked Questions

What is immunosenescence?

Immunosenescence refers to the natural age-related decline in immune function that occurs as we get older.

What is the gut microbiome?

The gut microbiome is the collection of microorganisms that live within the digestive system and help support digestion, immunity and overall health.

Can gut health affect healthy ageing?

Research suggests that the gut microbiome may influence immune function, inflammation and several aspects of healthy ageing.

Are probiotics important for older adults?

Probiotics may support microbiome balance, but they work best alongside a healthy diet, regular exercise and good lifestyle habits.

Why is protein important as we age?

Protein helps support muscle maintenance, strength, mobility and physical function throughout the ageing process.

Where does bone broth fit into healthy ageing?

Bone broth provides naturally occurring protein and collagen-derived amino acids that can contribute to a balanced whole-food dietary pattern.

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