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That “butterflies in your stomach” feeling is not poetic nonsense. It’s biology. Your digestive system and your nervous system are in constant conversation, and your mood, stress levels, and digestion can influence each other in very real ways.
In this article, we’ll break down what the gut–brain axis is, why stress can show up as nausea or bloating, and where a collagen-rich, warm bone broth routine can fit—without treating food like a medical procedure.
1. You Have a “Second Brain” (Sort Of)
Your gut has its own built-in network of nerves called the Enteric Nervous System (ENS). It contains an enormous number of neurons and can run many digestive processes independently—hence the nickname “the second brain.”
The ENS is also connected to your central nervous system through multiple pathways, including the vagus nerve, which is a major “two-way street” carrying signals between the gut and the brain.
The Serotonin Surprise (With an Important Caveat)
You’ll often hear that “most serotonin is made in the gut.” That’s broadly true for total serotonin in the body. The key nuance is that most gut serotonin is peripheral (used for gut and body functions) and does not simply convert into “more happiness” in the brain.
Still, the gut can influence how you feel through several mechanisms—nerve signalling, immune signalling, blood sugar dynamics, sleep quality, and the overall stress load your system is carrying.
2. Why Your “Butterflies” Are Real
When you feel anxious, excited, or under pressure, your body shifts into a higher-alert state. Blood flow, muscle tension, breathing patterns, and digestion can all change. That’s why you might feel nausea before a presentation or lose your appetite after bad news.
In simple terms: your nervous system is prioritising “deal with the situation” over “digest lunch.” That shift involves multiple systems (not just one nerve), but it explains the classic stomach sensations we all recognise.
3. Can Gut Stress Show Up as Brain Fog?
Researchers are actively studying links between gut barrier function, inflammation, and cognitive symptoms like fatigue or “fog.” What matters for marketing and real life is this: the science is complex, and we should avoid turning early research into absolute promises.
A safer, evidence-respecting takeaway is: if your digestion is constantly irritated, it can add to your overall stress burden—and many people feel better (including mentally) when their digestion is calmer and their routine is more stable.
4. Where Bone Broth Collagen Fits (Without Overpromising)
Bone broth collagen is food. It is not a medical substitute for therapy, medication, or clinician-led care. But food can still be a practical part of a calmer routine—especially when it is warm, simple, and easy to digest.
Collanature’s bone broth collagen is described as slow-cooked for 48 hours and blast-frozen at −18°C to preserve freshness, using a short ingredient list (beef bones, joints and cartilage, vegetables, water). Because it is a broth-based collagen, it is a convenient way to add protein to your day in a gentle format.
If you want to make this “gut–brain” supportive, think habits, not hype:
- Morning: a warm cup can be a simple, steady start (especially if stress kills your appetite).
- Evening: a warm drink ritual can help you downshift before bed (indirectly supporting rest and recovery routines).
- Consistency: a daily habit tends to beat occasional “mega-fixes.”
5. Frequently Asked Questions
What is the gut–brain axis?
The gut–brain axis is the communication network between your digestive system and your nervous system. It includes nerve signalling (including the vagus nerve), immune signalling, hormones, and metabolic factors that can influence digestion, stress response, and how you feel day to day.
Does bone broth collagen “treat” anxiety or depression?
No. Food should not be positioned as a treatment for clinical mental health conditions. What it can do is support a steadier daily routine (protein intake, warm hydration rituals, comfort foods that are easier to digest) which may help some people feel more stable overall.
Can gut issues contribute to brain fog?
They can be associated for some people, but causes vary widely (sleep, stress, iron, thyroid, medications, blood sugar, hydration, and more). If brain fog is persistent, it is worth discussing with a qualified healthcare professional.
Is it better to drink it in the morning or at night?
Both can work depending on your goal. Morning can support consistency and appetite. Evening can support a calming routine. The “best” time is the one you can follow consistently.
Which Collanature product should I start with?
If you prefer a neutral taste and maximum versatility, start with Original (Unflavoured). If you want a fruit-based option, explore Wild Berries. Use the product pages as the source of truth for serving guidance and nutrition.
Final Thoughts
Trust your body’s signals. If your digestion feels constantly “on edge,” your nervous system often is too. The goal is not to chase miracle fixes, but to build a calmer baseline—one meal, one habit, one day at a time.
Medical disclaimer: This article is educational and does not replace medical advice. If you have persistent digestive symptoms, unexplained weight loss, blood in stool, severe pain, or mental health concerns, please speak with a qualified healthcare professional.
Shop Collanature: Original (Unflavoured) or Wild Berries.
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