Decoding Trauma’s Physical Footprint

A single moment has the power to change a life. Some experiences leave no trace, while others can morph into post-traumatic stress disorder (PTSD).

Trauma is not an individual issue

PTSD is an anxiety disorder that can significantly alter a person’s ability to work, socialize, and enjoy family life. It ranges from relatively mild to severe and, in extreme cases, also carries a high risk of suicide.

Approximately 63 percent of the adult population in Canada has been exposed to a traumatic event at some point in their life, which can increase the risk of substance use disorders and chronic diseases .

“Trauma involves experiences where your nervous system is overwhelmed and cannot cope—and it isn’t necessarily what has happened to you but how those experiences may be stored in your body and your mind,” says Charlotte Wyvill, RCC in Kamloops, BC.

Is trauma visible?

For the longest time, trauma was considered an emotional experience, and PTSD biomarkers were not readily accepted. But now, a growing body of research suggests that PTSD is not confined solely to the mind.

Its effects often become biologically embedded, influencing immune activity, metabolism, cardiovascular health, and even routine blood markers that clinicians already use in everyday care. Researchers have found that changes in markers associated with inflammation, metabolism, and liver function in people with PTSD may one day help clinicians better understand how trauma affects the body and even monitor recovery over time.

Monitoring both trauma and healing

Unresolved trauma can shape the nervous system and impact cardiovascular, metabolic, and immune processes.

Understanding the complex biology and physiology of trauma can help reduce stigma and improve care. As researchers continue to investigate blood biomarkers associated with PTSD, they are helping reframe the condition as one that affects the entire body—not just mental health.

“Having enough supportive, securely attached people [in your life] after a traumatic event can help make sense of the traumatic experience and can also help in recovery,” says Wyvill.

When trauma inhabits the whole body

Our bodies react to stressful experiences through the “fight or flight” response, which can trigger different symptoms:

• rapid heartbeat
• tense muscles
• acute digestive symptoms

The body’s stress response is designed to help us deal with challenges. However, chronic stress can impact our bodies in myriad ways:

• hypertension
• heart attack
• stroke

The impact on metabolic health

Stress hormones help mobilize energy by changing glucose availability and influencing appetite, fat storage, and insulin sensitivity—a brilliant strategy for short-term action.

Chronic stress, however, can lead to negative health outcomes, which can contribute to symptoms of depression and anxiety:

• sleep disruption
• emotional eating
• sedentary behaviour
• self-medicating

This is why measuring biomarkers (inflammatory molecules, cholesterol and glucose levels, and hormone and liver protein levels when applicable) may eventually provide clinicians with another way to monitor how PTSD affects the body and how recovery is progressing alongside improvements in symptoms.

Recovery interventions for the whole body

“Healing might look a bit different than what people expect,” says Wyvill. “There will always be triggers and invasive thoughts,” she adds, “but therapy helps shift beliefs and makes it less overwhelming to process.”

Most importantly, lifestyle interventions are essential in the recovery journey and provide support from the inside out. Because PTSD affects multiple body systems, recovery strategies that support brain, metabolic, cardiovascular, and immune health can support resilience.

A Mediterranean diet that includes a variety of whole foods high in fibre and bioactive compounds such as polyphenols, healthy fats, and high-quality protein has been shown to alleviate symptoms of PTSD and may also improve blood biomarkers.

Magnesium from food sources and through supplementation may help reduce neuroinflammation and oxidative stress, potentially supporting brain health.

Regular exercise can help improve PTSD symptoms, including depression, sleep disturbances, and substance use disorders. Exercise-induced positive changes are also reflected in how people attend to their daily habits and the way they interact socially—the latter playing an important part in recovery.

The emotional and social connection

Cognitive behavioural therapy for insomnia, along with stress management and healthy social connections, can be highly effective for people who experience sleep disturbances. “A positive, supportive community helps create a safe space for the trauma-healing work to happen, but for some people, feeling safe happens when connected to nature or animals,” says Wyvill. Eventually, this can help them reach a place where secure connections with other people can be established.

Expressing gratitude was found to reduce the severity of symptoms in people with PTSD, while a sense of purpose can help reframe negative experiences and encourage recovery. “Getting to a healed state might actually mean feeling more of the powerful emotions, including fear and sadness, but with the understanding that they are a natural part of being human and being accepted and processed as such,” says Wyvill.

Although trauma can leave measurable biological changes throughout the body, those changes are not necessarily permanent. As our understanding of PTSD continues to evolve, emerging research offers hope that healing can be reflected not only in how people feel, but also in the biological systems that support long-term health and resilience.