Amino Acids Explained: Understanding the Building Blocks of Protein, Recovery & Healthy Ageing
Amino Acids Explained: Understanding the Building Blocks of Protein, Recovery & Healthy Ageing
When people talk about nutrition, protein often receives most of the attention.
However, what makes protein valuable are the individual amino acids that make up that protein.
Amino acids are involved in numerous physiological processes throughout the body and contribute to:
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Muscle maintenance
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Physical function
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Growth and development
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Enzyme production
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Hormone production
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Overall nutritional adequacy
Understanding amino acids can help you make more informed choices about protein intake, healthy ageing, active lifestyles and overall wellbeing.
What Are Amino Acids?
Amino acids are small molecules that combine to form proteins.
When protein-containing foods are eaten:
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Protein is digested
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Amino acids are released
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Amino acids are absorbed
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The body uses them wherever they are needed
Amino acids contribute to a wide variety of normal physiological functions and are found throughout the body.
Because protein is involved in so many biological processes, amino acids are often described as the building blocks of life.
How Many Amino Acids Are There?
There are 20 standard amino acids used to build proteins in the human body.
These amino acids are generally grouped into three categories:
Essential Amino Acids
Essential amino acids must be obtained from food because the body cannot produce them in sufficient amounts.
The nine essential amino acids are:
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Leucine
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Isoleucine
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Valine
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Lysine
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Methionine
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Phenylalanine
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Threonine
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Tryptophan
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Histidine
These amino acids are found in a variety of protein-rich foods and contribute to overall protein nutrition.
Non-Essential Amino Acids
Non-essential amino acids can be produced by the body.
Examples include:
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Glycine
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Alanine
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Serine
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Asparagine
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Aspartic acid
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Glutamic acid
Although the body can produce them, they still play important roles within normal physiological processes.
Conditionally Essential Amino Acids
Some amino acids may be required in greater amounts during particular life stages or circumstances.
Examples include:
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Glutamine
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Arginine
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Proline
Researchers continue to investigate how nutritional requirements may vary across different stages of life and activity levels.
Amino Acids and Muscle Maintenance
Muscle tissue is continually being renewed and maintained throughout life.
Protein-rich foods provide amino acids that contribute to this process.
One amino acid that receives particular attention within sports nutrition is leucine.
Leucine is one of the branched-chain amino acids (BCAAs) found in complete protein foods and is widely recognised as an important component of overall protein nutrition.
Examples of leucine-rich foods include:
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Eggs
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Dairy foods
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Fish
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Poultry
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Meat
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Soy foods
For active individuals, adequate protein intake remains one of the most important nutritional considerations.
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Amino Acids and the Body's Natural Physiological Processes
Amino acids contribute to numerous physiological functions throughout the body.
For example:
Glycine
Glycine is one of the amino acids used in the production of glutathione, a naturally occurring compound involved in the body's antioxidant systems.
Methionine
Methionine is an essential amino acid that contributes to normal metabolic processes and protein synthesis.
Cysteine
Cysteine also contributes to the production of glutathione and is naturally found in many protein-rich foods.
Rather than focusing on individual nutrients, most nutrition professionals recommend prioritising a varied diet that provides a broad range of amino acids from different food sources.
Amino Acids Found in Bone Broth
Bone broth contains a distinctive amino acid profile because it is derived from bones and connective tissues.
Common amino acids found in bone broth include:
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Glycine
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Proline
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Hydroxyproline
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Glutamine
These amino acids contribute to the unique nutritional characteristics of collagen-rich foods.
At Broth & Co, bone broth is viewed as a convenient whole-food option that can contribute to daily protein intake and dietary variety.
A serve of Broth & Co Bone Broth provides approximately 5g of naturally occurring protein.
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Glycine: One of the Most Abundant Amino Acids in Collagen
Glycine is one of the most abundant amino acids found in collagen-rich foods.
It naturally occurs in:
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Bone broth
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Gelatin
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Collagen peptides
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Slow-cooked connective tissues
Researchers continue to investigate glycine because of its involvement in numerous physiological processes.
Because modern diets often contain less connective tissue than traditional diets, glycine-rich foods continue to attract growing interest within nutrition research.
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Proline and Hydroxyproline
Proline and hydroxyproline are characteristic amino acids found in collagen-rich foods.
They contribute to the amino acid profile found in:
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Bone broth
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Collagen peptides
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Gelatin
These amino acids help distinguish collagen-rich foods from many traditional protein sources.
Glutamine and Digestive Wellbeing Research
Glutamine is naturally present in a variety of protein-rich foods.
Researchers continue to investigate its relationship with digestive health and overall wellbeing.
Bone broth naturally contains glutamine alongside other collagen-derived amino acids, making it a popular food within whole-food nutrition approaches.
Arginine and Active Lifestyles
Arginine is a conditionally essential amino acid that contributes to normal physiological processes throughout the body.
Researchers continue to investigate the role of arginine in exercise physiology, nutrition and active lifestyles.
It is naturally found in foods including:
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Meat
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Poultry
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Fish
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Nuts
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Seeds
Amino Acids and Brain Function
Amino acids are involved in the production of neurotransmitters.
For example:
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Tryptophan contributes to serotonin production
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Tyrosine contributes to dopamine production
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Glycine functions as a neurotransmitter within the nervous system
Researchers continue to investigate the relationship between nutrition, amino acids and overall wellbeing.
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Amino Acids and Energy Metabolism
Protein and amino acids contribute to numerous processes involved in energy metabolism.
Together with:
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Adequate nutrition
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Sleep
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Physical activity
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Hydration
they form part of the broader foundations of health and wellbeing.
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Amino Acids and Healthy Ageing
Maintaining adequate protein intake becomes increasingly important throughout life.
Healthy ageing nutrition strategies often focus on:
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Adequate protein intake
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Physical activity
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Resistance exercise
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Nutrient-dense foods
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Recovery
Amino acids contribute to overall protein nutrition and support the body's ongoing maintenance and renewal processes.
Why Bone Broth Complements Complete Proteins
Most protein-rich diets focus on foods such as:
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Meat
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Fish
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Eggs
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Dairy foods
These foods provide essential amino acids required by the body.
Bone broth provides a different amino acid profile characterised by:
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Glycine
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Proline
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Hydroxyproline
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Glutamine
For this reason, bone broth is best viewed as a complementary protein source rather than a replacement for complete proteins.
Together, complete proteins and collagen-rich foods can contribute to a varied and balanced dietary pattern.
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Practical Takeaways
To support overall protein nutrition:
Prioritise Adequate Protein Intake
Include quality protein sources throughout the day.
Include a Variety of Protein Foods
Different protein sources provide different amino acid profiles.
Focus on Whole Foods
Build meals around nutrient-dense foods.
Consider Collagen-Rich Foods
Bone broth and collagen-rich foods can complement traditional protein sources.
Final Thoughts
Amino acids are the individual components that make protein such an important nutrient.
They contribute to muscle maintenance, physical function, growth, development and numerous physiological processes throughout the body.
Rather than focusing on a single amino acid, the most effective strategy is usually to consume a variety of protein-rich foods that provide a broad spectrum of amino acids.
At Broth & Co, we believe real food, dietary variety and consistent habits remain the foundation of long-term wellbeing.
Frequently Asked Questions
How many amino acids are there?
There are 20 standard amino acids used to build proteins in the human body.
What are essential amino acids?
Essential amino acids must be obtained from food because the body cannot produce them in sufficient amounts.
What amino acids are found in bone broth?
Bone broth naturally contains glycine, proline, hydroxyproline and glutamine.
Is bone broth a complete protein?
No. Bone broth is not considered a complete protein and is best used alongside other protein-rich foods.
Why are amino acids important?
Amino acids contribute to numerous physiological functions and are the building blocks of protein.