New research has found a link between gut bacteria and anxiety — the diversity and quantity of your gut bacteria can affect your anxiety levels. Scientists believe this could play a role in treating PTSD, or post-traumatic stress syndrome.

In the study, researchers subjected mice to stressful conditions until they showed signs of anxiety and stress: shaking, diminished appetite, and reduced social interaction. Fecal samples showed the stressed mice had less diversity of gut bacteria than calmer mice who had not been subjected to stress.

When they fed the stressed mice the same live bacteria found in the guts of the calm mice, the stressed mice immediately began to calm down. Their stress levels continued to drop in the following weeks.

Brain scans also showed the improved gut flora produced changes in brain chemistry that promotes relaxation.

These biomarkers, according to researchers, can indicate whether someone is suffering from PTSD or is at a higher risk of developing it. Improving gut microflora diversity may play a role in treatment and prevention.

The role of healthy gut bacteria in the military

Because about 20 percent of Iraq and Afghanistan war veterans suffer from PTSD, the military is interested in the potential of influencing gut bacteria to manage and predict the risk of PTSD, anxiety, and depression. Enhancing gut microflora may also help submarine crews who go for long periods in confined spaces and with no daylight.

How to improve the health of your gut bacteria for anxiety, PTSD, depression, obesity, eating disorders

The quality and diversity of gut bacteria, or the “gut microbiome,” has been linked to not only anxiety, but also depression, obesity, eating disorders, autism, irritable bowel syndrome, and many other common disorders.

In other words, if you want to improve your health, you need to tend to your inner garden and make it richly diverse and bountiful. Although we’re still a ways off from a magic-bullet approach, there are many ways you can enrich the environment of your gut microbiome:

Cut out foods that kill good bacteria and promote harmful bacteria: Sugars, processed foods, processed carbohydrates, alcohol and energy drinks, fast foods, food additives, and other unhealthy staples of the standard American diet.

Eat tons of fiber-rich plants, which good bacteria love: All vegetables but especially artichokes, peas, broccoli, Brussels sprouts, as well as fruits. Either way, eat a large diversity of veggies on a regular basis instead of the same thing every day.

Use probiotics: Live, “friendly” bacteria that bolster your gut’s population of healthy microbes. Read the label to make sure they are high in live bacteria. Dietary fiber nourish these friendly probiotic bacteria. This combination of pre- and probiotic support is vital for healthy gut bacteria.

Eat fermented foods: Sauerkraut, kimchee, kombucha, and yogurt contain live microbes, and can also help boost the probiotic content of your digestive tract. Not all fermented foods have live cultures so make sure to read the labels.

Protect your existing gut flora: Medications, age, health status, and stress influence your gut microbiome. Eating a fiber-strong, gut-friendly diet and supplementing with probiotics and fermented foods is one of your best strategies for supporting gut health, a healthy mood, and stress resiliency.

Do you suffer from depression, anxiety disorders, brain fog, memory loss, or other brain-based issues? While conventional medicine turns to drug treatments, recent research points to poor gut health as the root of mental illness. This is because inflammation in the gut triggers inflammation throughout the body, including in the brain, bringing on depression, anxiety, brain fog, memory loss and other neurological symptoms. Read More