Stress vs. Anxiety: Biological Differences, Cortisol's Role, and Ashwagandha's Efficacy

This podcast episode by Dr. Tracey Marks meticulously distinguishes between stress and anxiety, two terms often used interchangeably but possessing distinct biological underpinnings and symptomatic presentations. Stress is primarily a physiological and psychological response to external circumstances or "stressors," which can be emotional (e.g., financial pressures, relationship conflicts) or physical (e.g., surgery, illness). It triggers the body's fight-or-flight mechanism, largely mediated by the stress hormone cortisol. Anxiety, on the other hand, is characterized by fear or worry about a perceived threat, often without an immediate external trigger, and is more closely associated with specific brain regions like the amygdala and prefrontal cortex. While stress can certainly trigger or exacerbate anxiety symptoms, true anxiety disorders involve persistent, often irrational fears that are not necessarily tied to current situational stressors.

The episode delves into the biological mechanisms, explaining that cortisol levels naturally fluctuate throughout the day, peaking in the morning and declining by night. However, chronic stress can lead to an elevated "cortisol awakening response," resulting in intense morning anxiety symptoms such as tension, nausea, or panic, and can also disrupt sleep if levels remain high in the evening. Prolonged stress, even in the absence of an anxiety disorder, can have significant physical health consequences, including high blood pressure, insulin resistance, and weight gain. The distinction is crucial because interventions effective for stress may not be equally effective for anxiety disorders.

Dr. Marks then introduces ashwagandha, an adaptogenic evergreen herb used in traditional Indian medicine, as a complementary and alternative treatment. Research suggests that ashwagandha works by reducing cortisol levels, particularly morning cortisol, making it beneficial for alleviating anxiety symptoms in individuals under significant stress. This mechanism explains why it is more effective for stress-induced anxiety than for pre-existing anxiety disorders, which are rooted in different neurological pathways. The podcast provides practical guidance on ashwagandha, noting that studies typically use doses between 250-600 milligrams taken in the morning, and warns against higher doses (over 1,000 milligrams) due to potential side effects like nausea, vomiting, diarrhea, and liver injury.

In conclusion, the episode emphasizes the importance of understanding the specific nature of one's distress to choose appropriate interventions. For those experiencing stress overload, particularly with symptoms like intense morning anxiety or broken sleep indicative of elevated cortisol, ashwagandha may offer relief. However, for diagnosed anxiety disorders, other therapeutic approaches are likely more suitable. The discussion also reinforces the value of established stress-reduction techniques such as exercise, breathing exercises, and meditation, highlighting the holistic approach to mental well-being and the intricate connection between mind and body in managing stress and anxiety.

Some people will use stress and anxiety interchangeably, but stress and anxiety are not the same.

Stress can cause feelings of angst, usually triggered by a circumstance.

Your stress hormones serve the purpose of preparing your body for a fight or flight response.

If you are under a lot of stress, you can have higher than normal cortisol levels in the morning called the cortisol awakening response.

Anxiety is different from stress because it's generally based on fear or worry about a threat.

But with true anxiety, you don't need a trigger to experience the symptoms. And your fears and worries don't have to be based on real threats.

Prolonged stress can also cause physical problems like high blood pressure, insulin resistance, and weight gain.

So far, the studies have shown that it helps anxiety in people who were under a lot of stress. But it's not as good at relieving anxiety in people with an anxiety disorder.

Herbs that improve your body's stress response are called adaptogens.

So if you're feeling overloaded with stress, ashwagandha may be worth a try, especially if you're having intense morning anxiety or broken sleep.