The Gut–Brain Connection: How Your Microbiome Influences Mood, Metabolism, and Cravings
By Dr. Stefanie Basso, PhD, BCFNP
Most people think of the gut as a digestive organ. In practice, it functions more like a command center -- continuously communicating with the brain through what we call the gut–brain axis. This communication shapes how you feel after meals, how clearly you think during the day, and how your body regulates appetite, energy, and fat storage.
A few data points help bring this into focus. Roughly 90–95% of serotonin -- a key neurotransmitter involved in mood and well-being -- is produced in the gut. The vagus nerve provides a direct, two-way line of communication between the gut and the brain, and emerging research shows that shifts in the microbiome can influence stress reactivity, cognition, and even decision-making around food. In metabolic research, the composition of the microbiome has been linked to insulin sensitivity and weight regulation, helping explain why two people can eat similarly and experience very different outcomes.
In my work, I often see clients who feel “off” -- low energy, brain fog, heightened cravings, or a sense that their metabolism has slowed. When we step back and look at the gut, we frequently find the missing piece. The microbiome is not just responding to what you eat; it is actively shaping what your body does with that information.
My Approach: Read the Signals, Then Correct Them
As a functional nutrition practitioner, I approach the gut–brain connection through a root-cause, lab-informed lens. We assess what is happening in the microbiome, how well digestion is functioning, and how the nervous system is influencing these processes.
In my practice, I don’t rely on guesswork when it comes to the gut -- I use targeted testing. One of the most valuable tools I use is a comprehensive GI Microbiome Analysis, which allows us to assess bacterial balance, inflammation, and digestive function at a deeper level. This gives us a precise roadmap to restore the gut and improve the signals being sent to the brain and metabolism.
From there, we build a personalized strategy that integrates nutrition, movement, and nervous system regulation -- what I refer to as my “three doctors.” When these are aligned, the signals your body sends and receives begin to shift in your favor.
How the Gut Shapes Mood, Cravings, and Metabolism
The microbiome influences mood in a very real, physiological way. When beneficial bacteria are supported, they help regulate neurotransmitter production and reduce inflammatory signaling that can impair brain function. When the gut is imbalanced, those same pathways can contribute to low mood, irritability, and reduced mental clarity. This is one reason people often notice improved emotional stability when their digestion improves.
Cravings are another area where the gut exerts powerful influence. Certain microbial patterns are associated with increased preference for sugar and refined carbohydrates. This is not simply a behavioral issue -- it is a biological feedback loop. When the microbiome is out of balance, it can reinforce patterns that keep it that way. When we improve the environment of the gut, those signals often quiet down, and appetite becomes more stable without forcing restriction.
Inflammation is the third major connection point. A compromised gut lining or imbalanced microbiome can increase inflammatory signaling, which affects both brain function and metabolic efficiency. This is where clients report feeling mentally foggy, physically fatigued, and metabolically “stuck.” When we reduce that inflammatory load and improve gut integrity, both cognitive clarity and metabolic responsiveness tend to improve.
Where Sulforaphane Fits In
Supporting the gut–brain axis requires more than adding probiotics. It requires improving the environment those bacteria live in and reducing the stressors that disrupt signaling. One compound that has gained attention in this area is sulforaphane, found in broccoli microgreens.
Sulforaphane activates the NRF2 pathway, a key regulator of detoxification and cellular defense. When this pathway is upregulated, the body becomes more efficient at handling oxidative stress and inflammation -- two factors that directly impact both the gut and the brain. In practical terms, this can support a more balanced microbiome environment, clearer cognitive function, and improved metabolic signaling.
Most people, however, are not consuming enough cruciferous vegetables to reach meaningful levels of sulforaphane consistently. This is where concentrated sources can be useful. Ederra’s EMPWR+ provides a standardized dose of broccoli microgreens -- where one scoop is equivalent to consuming over a pound of broccoli. From a clinical standpoint, this offers a realistic way to support these pathways daily without relying on impractical food volume. Ederra’s broader mission of delivering farm-to-body, nutrient-dense compounds aligns with how I approach building a strong internal environment for both gut and brain health.
What You Can Start Doing Now
If there is one takeaway I want you to leave with, it’s this: the gut responds quickly to consistent, supportive inputs. You don’t need to overhaul everything overnight. Start by slowing down how you eat, chewing more thoroughly, and allowing your body to enter a true “rest and digest” state during meals. Build your plate around whole foods with fiber diversity -- different colors, textures, and plant sources -- to feed a wider range of beneficial bacteria. Pay attention to how you feel after eating, not just what you ate. That awareness alone begins to change behavior.
Just as important is protecting your nervous system. Sleep, stress, and pacing matter. A well-designed nutrition plan cannot override a body that is constantly in a stress response. When you support both the gut and the nervous system together, the communication between them improves -- and that is where real change happens.
Final Thought
Your cravings, your mood, and your metabolism are not random. They are responses to signals -- many of which begin in the gut. When you strengthen your microbiome and reduce the noise of inflammation and stress, your body becomes more stable, more efficient, and more aligned with your goals.
Taking care of your gut is not just about digestion. It is one of the most powerful ways to support your brain, your energy, and your long-term health.
Work With Dr. Stefanie Basso
If you’re ready to understand your gut and metabolism at a deeper level, you can begin with a 60-minute Functional Nutrition Strategy Session, where we assess your current symptoms, lifestyle patterns, and potential root causes.
Through my partnership with Ederra, you also have access to the Longevity Bundle, which includes EMPWR+ (12 month supply), a longevity booklet, a signed copy of my book, and a complimentary 60-minute Functional Nutrition Strategy Consultation with me -- available to the first five individuals each month.
You’ll also receive 25% off your first Ederra order, giving you a consistent way to support your gut–brain connection and metabolic health.
If you’re ready to feel clearer, more energized, and more in control of your body -- this is where you begin.
—Dr. Stefanie Basso
