Gut Health

Your gut is your second brain. No, really. 🧬

The gut makes 95% of your serotonin, houses 70% of your immune system, and talks directly to your brain 24/7. Here's what that actually means for you.

By the Numbers

Your gut is more powerful than you think.

100T

Microorganisms living in your gut — more cells than you have in your entire body

95%

Of your serotonin (the "happiness chemical") is produced in your gut — not your brain

70%

Of your immune system lives in your gut — making it your body's primary defense headquarters

500M

Nerve cells in your gut — it has its own nervous system called the enteric nervous system

The Gut-Brain Axis

How your gut talks to your brain 🗣️

Your gut and brain are in constant two-way communication via the vagus nerve. 80% of signals go FROM gut TO brain — meaning your gut shapes your mood more than your brain shapes your digestion.

🧠 Brain
SIGNALS
⟷
VAGUS NERVE
🦠 Gut Microbiome

The vagus nerve = the direct line between your gut and your brain. What you eat affects how you feel, your stress levels, and even how clearly you think. 🤯

🧬 What is the microbiome?

Trillions of bacteria, fungi & viruses living in your gut. Diverse microbiome = stronger health across the board.

  • Makes serotonin, dopamine, and GABA (mood chemicals)
  • Trains your immune system from birth
  • Breaks fiber into anti inflammatory compounds
  • Talks to your brain — affects mood, appetite & stress

⚠️ What kills your microbiome?

American gut diversity is way down vs. less industrialized societies. Here's why 👇

  • Ultra processed foods & artificial additives
  • Antibiotics (kills good bacteria too)
  • Chronic stress → elevated cortisol → disrupts gut lining
  • Low-fiber diet (starves good bacteria)
  • Bad sleep & excessive alcohol

😞 Gut health & mental health

People with depression have measurably different gut bacteria than those without. The gut-mood connection is real. 🧠

  • Low gut diversity → higher depression rates
  • Probiotics → measurable drop in anxiety symptoms
  • Gut makes 95% of your serotonin — inflammation disrupts it
  • "Leaky gut" lets inflammatory compounds into your blood, affecting brain function

💪 Build a healthy gut

Not about expensive supplements. Just consistent habits. 🙌

  • 30+ different plant foods per week = #1 diversity predictor
  • Fermented foods daily (yogurt, kimchi, kefir)
  • Prioritize fiber — it literally feeds your good bacteria
  • Minimize ultra processed food & artificial sweeteners
  • Manage stress — your gut bacteria respond to cortisol

What to Eat 🍽️

Gut-friendly foods — accessible & easy to find.

Food Why it helps your gut Easy way to eat it
🥛 Yogurt (live cultures)Adds Lactobacillus bacteria → supports digestion + immunityGreek yogurt with fruit. Look for "live active cultures" on label.
🥬 Sauerkraut / KimchiFermented veggies packed with diverse probiotic strains + prebiotic fiberAdd a spoonful to eggs, rice, or sandwiches. Small amounts = big impact.
🫘 Beans & LentilsHigh fiber prebiotic → feeds good bacteria → produces anti inflammatory compoundsCanned chickpeas on salads. Lentil soup: 20 minutes start to finish.
🧄 Garlic & OnionLoaded with inulin — a prebiotic fiber that selectively feeds beneficial bacteriaCook into literally anything. Raw garlic = strongest effect.
🍌 Slightly green bananasResistant starch = potent prebiotic. More resistant starch than ripe bananas.Eat as-is. The less ripe, the better for your gut.
🫚 Extra virgin olive oilPolyphenols feed beneficial bacteria + reduce gut inflammationDrizzle on veggies or salads. Use for light cooking.
🍵 Kombucha (low sugar)Fermented tea with organic acids + probiotics. Supports gut pH.Soda swap. Pick brands with under 5g sugar per serving.