A Broth & Co guide to emerging mitochondrial microprotein research, cellular communication, Mediterranean-style eating and healthy ageing.

For decades, mitochondria were mostly introduced as the powerhouses of the cell. That description is useful, but incomplete.

Mitochondria help convert food and oxygen into ATP, the energy currency cells use every second. But modern biology has revealed something more interesting: mitochondria also send messages. They help coordinate metabolism, oxidative stress responses, inflammatory signalling, cellular adaptation and healthy ageing.

Among the most fascinating of these messages are tiny mitochondrial proteins called Humanin and SHMOOSE. They are not nutrients. They are not supplements. They are small proteins produced from genetic instructions within mitochondrial DNA, and scientists are studying them because they may help explain how mitochondria communicate with the rest of the cell and body.

This is the memorable idea: your mitochondria do not simply make energy. They also help your cells listen, respond and adapt.

 

Hidden Messages From Inside Your Cells

Human cells contain DNA in the nucleus, but mitochondria also carry their own small amount of DNA. For a long time, scientists thought mitochondrial DNA mainly encoded a small group of proteins involved in energy production.

Advances in molecular biology have changed that view. Researchers have discovered that small open reading frames within mitochondrial DNA can produce tiny biologically active proteins known as mitochondrial-derived peptides or mitochondrial microproteins. These proteins are small, but the biological questions they raise are enormous.

Humanin was one of the first mitochondrial-derived peptides to attract scientific interest. SHMOOSE, short for Small Human Mitochondrial ORF Over SErine tRNA, was identified more recently in research exploring mitochondrial DNA variation and brain ageing.

The discovery matters because it changes the way we think about mitochondria. They are not only energy factories. They may also produce signalling molecules that help cells respond to stress, communicate with the nucleus, regulate metabolism and adapt over time.

Mitochondrial Health: How to Boost Energy, Metabolism & Cellular Function Naturally explains the broader role of mitochondria, while The Gut–Mitochondria–Brain Connection: How Cellular Energy Links Digestion, Brain Function & Whole-Body Health explores how cellular energy connects digestion and brain function.

A useful analogy is to think of mitochondria as both power stations and radio towers. The power station role is familiar: mitochondria help generate ATP. The radio tower role is newer: mitochondria appear to send molecular signals that tell the rest of the cell how energy production, stress, repair and adaptation are going.

This is why mitochondrial-derived peptides are so intriguing. They suggest that tiny messages produced inside mitochondria may help coordinate larger biological responses. A protein does not need to be large to be meaningful. Sometimes a small signal can change the behaviour of an entire system.

 

Meet Humanin

Humanin is a small peptide encoded by mitochondrial DNA. It was first described in the early 2000s and has since become one of the best-studied mitochondrial-derived peptides.

Experimental studies have investigated Humanin in relation to mitochondrial function, cellular stress responses, insulin sensitivity, cardiovascular biology, neuroprotection and ageing. Much of this work has been conducted in cell, animal or mechanistic research settings, which means it should be interpreted as developing science rather than everyday clinical guidance.

One reason Humanin is so interesting is that it appears to sit at the meeting point of several biological systems: energy production, oxidative stress, inflammation, cell survival and metabolism. That does not make it a magic molecule. It makes it a useful clue. Humanin helps researchers ask better questions about how mitochondria influence whole-body ageing.

Researchers have explored Humanin in relation to insulin signalling, endothelial function, neuronal stress, mitochondrial stress responses and age-related biology. These areas may sound separate, but they share a common theme: cells must continually decide how to use energy, protect themselves and communicate under changing conditions.

For everyday health education, Humanin is valuable because it makes an invisible idea easier to understand. Cellular ageing is not simply a slow loss of energy. It involves communication, stress responses, repair systems, nutrient sensing and mitochondrial quality control. Humanin sits in that conversation.

 

Meet SHMOOSE

SHMOOSE is newer and less understood than Humanin. It was identified through research linking mitochondrial DNA variation with Alzheimer's disease-related biology, brain structure and mitochondrial function.

Researchers detected SHMOOSE-derived peptide fragments in mitochondria and investigated how SHMOOSE may interact with mitochondrial structures. Early work suggests it may influence mitochondrial oxygen consumption and neuronal stress responses in experimental models.

The important phrase here is early work. SHMOOSE is not an established nutrition target. It is not something people can currently measure or change through a simple dietary instruction. Its value right now is scientific: it opens a new window into mitochondrial communication and brain ageing research.

The Mediterranean Diet for Brain Health and Protein, Amino Acids & Brain Health: How Nutrition Supports Neurotransmitters, Cellular Energy & Cognitive Function place brain nutrition in a broader food-first context.

SHMOOSE is also a reminder that brain health is deeply cellular. Neurons require energy, membranes, protein maintenance, antioxidant balance and constant communication with supporting cells. When scientists study a tiny mitochondrial microprotein in the context of brain ageing, they are really studying how microscopic cellular processes may influence whole-body and cognitive ageing over time.

Why This Research Is Exciting

The excitement around Humanin and SHMOOSE is not just about two tiny proteins. It is about what they represent.

For many years, parts of the genome were overlooked because they did not appear to code for familiar proteins. As scientific tools improved, researchers began finding small open reading frames and microproteins that earlier methods had missed. Biology had been speaking in a quieter language than we knew how to hear.

That is the 'I never knew that' moment in this article: some of the body's most interesting signals may be so small that older scientific tools simply could not detect them well.

This matters for nutrition science because the body does not respond to food in a simple one-nutrient, one-outcome way. Meals influence hormones, immune signals, the gut microbiome, blood vessels, muscles, brain function, mitochondria and cellular repair systems. Humanin and SHMOOSE may be part of that larger conversation.

Why Nutrition Is About More Than Calories: Understanding Food Quality, Nutrient Density & Long-Term Health explains this bigger view of food quality.

What the Mediterranean Diet Study Found

A 2026 cross-sectional pilot study examined whether adherence to a Mediterranean-style diet was associated with circulating levels of Humanin and SHMOOSE in 49 older adults with non-valvular atrial fibrillation.

Participants with stronger Mediterranean diet adherence had higher measured levels of Humanin and SHMOOSE. The study also found associations between specific dietary components and these microproteins. Extra virgin olive oil, fish and legumes were positively associated with Humanin, while olive oil and lower refined bread intake were associated with higher SHMOOSE levels.

The study also measured markers of oxidative stress. Higher Humanin levels were associated with lower markers related to Nox2 activity and oxidative stress. This is intriguing because oxidative balance is one of the major themes in mitochondrial and ageing biology.

The finding is exciting because it suggests whole dietary patterns may be linked with mitochondrial signalling pathways. But it must be interpreted carefully. The study was observational and cross-sectional. It can show associations; it cannot prove that changing diet directly increases Humanin or SHMOOSE, or that those changes lead to specific health outcomes.

The study population also matters. This was not a large general-population nutrition trial. It involved older adults with a specific cardiovascular condition. That makes the findings scientifically interesting, but it also means they should not be stretched into broad consumer promises.

A better way to read the study is this: researchers have found a possible connection between an established healthy dietary pattern and emerging mitochondrial signals. That connection deserves more research. It also supports a direction nutrition science has been moving toward for years: food patterns may influence health through many small biological pathways operating together.

 

Why Dietary Patterns Matter More Than Single Ingredients

The Mediterranean diet study is useful because it points toward dietary patterns rather than isolated nutrients. The Mediterranean diet is not simply olive oil or fish. It is a pattern built around vegetables, legumes, fruit, extra virgin olive oil, nuts, herbs, whole grains where appropriate, quality protein, seafood where eaten and fewer ultra-processed foods.

A single meal sends many signals at once. Protein provides amino acids for repair and enzymes. Fibre feeds gut microbes. Healthy fats support meal satisfaction and cell membranes. Colourful plants provide polyphenols and vitamins. Herbs and spices add flavour and plant diversity. Slow-cooked meals often make nourishing foods easier to eat regularly.

This is why the practical message is not to chase Humanin or SHMOOSE. The practical message is to build the kind of food environment that supports mitochondria, metabolism, gut health, vascular health, muscle and healthy ageing over time.

A Mediterranean-style pattern is memorable because it is less about restriction and more about rhythm: vegetables often, legumes regularly, herbs generously, protein consistently, olive oil where it suits the meal, seafood where eaten, fewer refined foods and meals that feel satisfying enough to repeat. The biology follows the pattern, not the marketing label.

This is also why traditional cooking matters. Soups, stews, broths, legumes, slow-cooked vegetables and shared meals make nutrient-rich eating more practical. Healthy ageing is not supported by rare perfect meals. It is supported by ordinary meals repeated over many years.

Food Is More Than Nutrition | Health, Communities & the Planet explores food as biology, culture and connection.

Oxidative Stress, Mitochondria and Cellular Resilience

Mitochondria naturally produce reactive oxygen species as part of energy production. In the right amounts, these molecules act as signals. They help cells adapt to exercise, support normal immune responses and coordinate cellular stress responses.

Oxidative stress occurs when reactive molecules exceed the body's ability to regulate them. This can affect membranes, proteins, DNA and mitochondria. Healthy physiology depends on balance, not the complete absence of reactive molecules.

Humanin has attracted attention partly because researchers are investigating how it relates to oxidative balance and cellular stress responses. SHMOOSE is also being studied through the lens of mitochondrial biology and nervous system function. These are early but important clues in the wider story of healthy ageing.

Chronic Inflammation Explained: Diet, Lifestyle, Gut Health & Everyday Wellbeing and The Science of Inflammaging: How Diet, Movement & Gut Health Influence Healthy Ageing explain how oxidative stress, immune signalling and ageing biology overlap.

Can You Increase Humanin or SHMOOSE Naturally?

At this stage, the honest answer is that we do not know.

There is currently no evidence-based food, supplement or lifestyle protocol proven to specifically increase Humanin or SHMOOSE in a predictable way in everyday life. These proteins are still active research topics, not established consumer biomarkers.

That does not make the research less valuable. It simply means the correct response is curiosity rather than overclaiming. The discovery of these microproteins supports a broader idea: healthy ageing is influenced by the way whole biological systems communicate, adapt and maintain themselves over time.

This distinction matters. It is easy for emerging science to become oversimplified once it leaves the laboratory. A study about associations can become a headline about boosting a molecule. A microprotein can become a product story before the biology is mature. Broth & Co's position is more grounded: emerging science should deepen our respect for the body, not push people toward unrealistic promises.

 

What Healthy Mitochondria Need Every Day

Mitochondria need fuel, oxygen, nutrients, movement signals and recovery. They also sit within cells that depend on protein synthesis, DNA repair, antioxidant systems, membrane health and communication with other tissues.

For children and teenagers, this supports growth, learning, movement and development. For adults, it supports energy, focus, physical work, exercise and recovery. For new parents, it matters because sleep disruption and high daily demands can make energy feel stretched. For older adults, mitochondrial health is one piece of strength, brain health, metabolism and healthy ageing.

Nutrition Across the Lifespan: From Childhood to Healthy Ageing explains how nutrition needs shift across life, and Protein Throughout Life: Why Your Protein Needs Change With Age explains why protein remains important at every stage.

The foundations are simple, but they are not small. Adequate protein helps provide amino acids for enzymes, transporters, muscle, immune molecules and repair proteins. Plant foods provide fibre and a wide range of compounds that interact with the microbiome and cellular systems. Movement asks mitochondria to become more capable. Sleep gives the body time to restore and regulate. Recovery allows adaptation to become useful rather than exhausting.

 

Where Bone Broth Fits

Bone broth does not target Humanin or SHMOOSE. It is better understood as one practical food within a nutrient-rich dietary pattern.

Broth & Co bone broth can contribute protein and collagen-derived amino acids while adding savoury fluid and flavour to everyday meals. It works naturally in soups, stews, risottos, sauces, slow-cooked vegetables, legumes and Mediterranean-inspired recipes.

This matters because healthy patterns are easier to maintain when the food is simple, satisfying and repeatable. A broth-based soup with vegetables, legumes, herbs and protein can help turn cellular nutrition into an ordinary meal rather than a complicated routine.

Bone Broth Benefits: The Complete Guide to Gut Health, Protein, Recovery & Healthy Ageing explains the broader role of bone broth. Mediterranean Bone Broth Recipes and the collection of nourishing recipes offer practical food ideas.

The Future: Personalised Nutrition and Cellular Biology

Humanin and SHMOOSE also point toward a future where nutrition science becomes more personalised. Researchers are increasingly interested in biological markers that may help explain why different people respond differently to dietary patterns, exercise, sleep and other habits.

This field is promising, but still developing. For now, these microproteins are not everyday consumer tools. They are research signals that help scientists understand the hidden conversations inside the body.

The bigger lesson is already useful: health is not created by one organ, one nutrient or one pathway. It emerges from communication between cells, mitochondria, the gut microbiome, immune system, muscles, brain, blood vessels and the foods we eat over time.

Gut Health & Healthy Ageing: How the Microbiome Influences Longevity and Healthy Ageing, Immunosenescence & Gut Health Explained continue this systems view of healthy ageing.

 

Frequently Asked Questions

What are Humanin and SHMOOSE?

Humanin and SHMOOSE are tiny proteins produced from mitochondrial DNA. Scientists are studying them for possible roles in mitochondrial function, cellular communication, oxidative stress and healthy ageing.

Are Humanin and SHMOOSE nutrients?

No. They are not nutrients, vitamins or supplements. They are proteins produced by the body and are currently research topics rather than everyday nutrition targets.

Can diet increase Humanin or SHMOOSE?

There is no proven dietary method to specifically increase Humanin or SHMOOSE. A 2026 pilot study found associations between Mediterranean diet adherence and higher circulating levels, but it did not prove cause and effect.

Why are mitochondria linked with healthy ageing?

Mitochondria help produce energy and participate in cellular signalling, oxidative balance, metabolism and adaptation. These processes are closely connected with ageing biology.

Where does bone broth fit?

Bone broth does not target Humanin or SHMOOSE. It can be included as one practical food within a varied, protein-containing, whole-food dietary pattern.

What habits support mitochondrial health?

Whole-food meals, adequate protein, plant diversity, regular physical activity, sleep, recovery and long-term consistency all help support the broader conditions for healthy mitochondria.

Summary

Humanin and SHMOOSE remind us that the body still has many hidden layers of communication. These tiny mitochondrial microproteins are small enough to have been missed by older scientific tools, yet important enough to reshape how researchers think about mitochondria, brain health and ageing biology.

The research is exciting, but early. No food or supplement has been shown to specifically control Humanin or SHMOOSE in everyday life. The strongest message is broader and more useful: dietary patterns, movement, sleep and recovery create the environment in which mitochondria and cells can keep communicating, adapting and maintaining themselves.

That is the beauty of this science. It does not replace the foundations of health. It helps explain why those foundations may matter more deeply than we once realised.

References

·       Mediterranean diet adherence is associated with mitochondrial microproteins Humanin and SHMOOSE; potential role of the Humanin-Nox2 interaction in cardioprotection. 2026.

·       Miller B, Kim S-J, Mehta HH, et al. Mitochondrial DNA variation in Alzheimer's disease reveals a unique microprotein called SHMOOSE. Molecular Psychiatry. 2022.

·       Kim SJ, Xiao J, Wan J, Cohen P, Yen K. Mitochondrial-derived peptides in aging and age-related diseases. Ageing Research Reviews / related ageing biology literature.

·       Coradduzza D, Congiargiu A, Chen Z, et al. Humanin and its pathophysiological roles in aging: a systematic review. Biology. 2023.