Can probiotics boost your energy? The surprising link between your gut & energy levels!

Energy affects everything from productivity and mood to exercise and overall wellbeing. If you feel like you’re running on 10% battery by 3pm, you’re not alone.

Around 1 in 5 people in the UK say they feel tired all or most of the time, making fatigue one of the most common health complaints.¹² While most people blame poor sleep, diet, stress or getting older, there’s another surprising player that often gets overlooked… your gut.

Your gut is home to around 38 trillion microorganisms.³ Together, they weigh around 1-2 kg (about the same as your brain!) and contain over 150 times more genes than your own genome!⁴ Collectively, they’re often referred to as your “forgotten organ” and influence far more than digestion.⁵ These tiny microbes also help produce beneficial compounds, communicate with the brain, support your immune system, and even influence how efficiently your body uses energy from the foods you eat.

Which raises an interesting question: can probiotics actually influence your energy levels?

While probiotics aren’t a replacement for sleep or a balanced diet, growing evidence suggests they may support several biological processes linked to feeling more energetic. Let’s take a closer look.

Energy starts in the gut

Probiotics don’t contain energy in the way food does, and they won’t magically replace sleep, movement or a balanced diet. However, emerging research suggests that the health of your gut microbiome may influence several factors that contribute to how energetic you feel each day.

Every time you eat fibre-rich foods, your gut bacteria get to work. As they break down certain fibres, they produce compounds called short-chain fatty acids (SCFAs), which help fuel the cells lining your colon, support a healthy metabolism and maintain a healthy gut environment.⁶

In other words, your gut bugs aren’t just sitting there looking pretty. They’re busy helping to keep your digestive system and overall health running smoothly.

The gut-energy connection

Think about everything your body needs to feel energised:

Good digestion
Nutrient absorption
Balanced blood sugar
Healthy immune function
A resilient nervous system

Your gut is involved in every single one!

If digestion isn’t working well, it can become harder to absorb nutrients such as iron, magnesium, and B vitamins, all of which are involved in energy production.

But that’s not all! Beneficial gut bacteria don’t just help digest food, they also produce vitamins, enzymes and a wide range of compounds that help support normal metabolic processes throughout the body.

For example, certain gut microbes can synthesise B vitamins, which play a crucial role in converting the food you eat into usable energy.⁷ Meanwhile, SCFAs produced when your gut bacteria ferment fibre have been linked to healthy blood sugar regulation, insulin sensitivity, and metabolic health.⁸

It’s yet another reminder that your gut doesn’t just affect digestion – it influences systems throughout the entire body.

Your gut and brain are constantly talking

Have you ever noticed how stress can leave you feeling exhausted? Or how digestive flare-ups often seem to coincide with low mood, brain fog or poor concentration?

That’s because your gut and brain are in constant communication through what’s known as the gut-brain axis. Gut bacteria help produce and influence compounds involved in nervous system signalling, including GABA, serotonin and dopamine pathways. These chemical messengers help regulate mood, motivation, focus and stress resilience.⁹

In fact, approximately 90-95% of your body’s serotonin is produced in the gut.¹⁰ Although this serotonin doesn’t cross the brain, it plays an important role in digestion and highlights just how closely connected the gut and nervous system really are.

A healthier gut microbiome may help support a healthier, more resilient brain, too.

How does inflammation play a role?

One of the most overlooked contributors to fatigue is chronic low-grade inflammation. If the immune system is constantly dealing with inflammation, that can leave you feeling drained.

When the immune system is constantly activated, the body has fewer resources available for everything else. Many people describe this as feeling sluggish, drained or like they’re constantly running on empty.

Around 70% of your immune system resides in and around your gut. Your beneficial microbes are constantly communicating with immune cells, helping to shape how the body responds to challenges.¹¹¹²

Researchers are now uncovering just how important the microbiome may be in regulating inflammation throughout the body.

Why do some people feel more energetic after taking probiotics?

We hear this all the time: “I started kefir for my digestion, but I wasn’t expecting to feel more energetic too!“

This is not just anecdotal.

This observation is supported by our own published clinical research. Participants taking Chuckling Goat’s probiotic kefir alongside Complete Prebiotic reported significant improvements in wellbeing, productivity, daytime sleepiness, and fatigue, together with improvements in digestive symptoms and quality of life.¹³

When people improve their gut health, they often notice benefits that extend far beyond digestion. Less bloating. More comfortable bowel movements. Better routine. Improved resilience. More energy.

Now, probiotics aren’t the nutritional equivalent of an espresso shot. They don’t provide instant energy.

But when your digestion becomes more comfortable, the microbiome is better supported, and your body isn’t working so hard behind the scenes, many people simply feel better and more energetic.

Feed your microbes, don’t just feed yourself

One of the biggest mistakes people make is focusing entirely on probiotics while forgetting about what those beneficial bacteria actually eat. Your microbiome thrives on diversity.

People who eat more than 30 different plant foods each week have a significantly more diverse and resilient gut microbiome than those eating fewer than 10.¹⁴ Try including plenty of:

Vegetables
Fruit
Whole grains
Legumes
Nuts and seeds
Herbs and spices

Different fibres feed different bacteria, which is why variety matters far more than eating a “perfect” diet.

That’s exactly why we created our Complete Prebiotic, containing 18 different fibres designed to nourish a diverse and resilient microbiome.

Start with the Gut Health Protocol

When it comes to energy, there isn’t usually one magic solution.

The basics still matter: sleep, movement, hydration, stress management and eating real food.

But if you’re looking for a place to start, supporting your gut is a great foundation. Our Gut Health Protocol is a good place to begin with and combines:

Kefir – introduces more than 90 different strains of beneficial bacteria
Complete Prebiotic – feeds those beneficial bacteria with 18 different fibres
Complete Postbiotic – Provides you with an extra boost of beneficial gut compounds like SCFAs

Together, they help create the foundations for a healthier gut ecosystem.

A healthy gut microbiome can support digestion, nutrient absorption, immune balance, metabolic health and the gut-brain connection – all of which influence how energetic you feel.

So if you’re constantly searching for the next coffee, energy drink or quick fix, it might be worth paying a little more attention to the trillions of tiny helpers living inside your gut instead.

They could be doing more for your energy than you realise.

Read more about boosting your energy levels naturally, here.

Any questions? Contact one of our Nutritional Therapists via live chat, weekdays from 8 am to 8 pm.