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Ashwagandha and Cortisol: What the Research Actually Shows

By The SodaPeak Team · September 2026

Ashwagandha (Withania somnifera) is one of the most extensively studied adaptogens in modern clinical research. SodaPeak includes it as the stress adaptation and stamina anchor of our formula. Here is what the evidence actually supports.

Cortisol reduction

Multiple randomized controlled trials demonstrate that Ashwagandha root extract significantly reduces serum cortisol levels compared to placebo. One landmark study showed a 30% reduction in cortisol over 60 days.

Physical endurance

Research in healthy adults shows improvements in VO2 max, exercise capacity and muscle recovery with consistent Ashwagandha supplementation. The mechanism appears related to both cortisol reduction and improved oxygen utilization.

Mental clarity under stress

Studies show improvements in reaction time, attention and cognitive function in stressed adults taking Ashwagandha daily. The effect builds over 4 to 8 weeks of consistent use.

Important context

Ashwagandha can interact with thyroid medications, immunosuppressants and sedatives. If you take any prescription medication, consult your doctor before starting.

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