Ingredient
Ashwagandha: The Adaptogen for Stress, Sleep & Testosterone
Ashwagandha (Withania somnifera) is the most-studied adaptogen in modern integrative medicine. Standardized extracts such as KSM-66 and Sensoril have demonstrated measurable reductions in cortisol and perceived stress across dozens of randomized controlled trials.
The adaptogen mechanism
Adaptogens modulate the hypothalamic-pituitary-adrenal (HPA) axis, bringing an over- or under-active stress response back toward baseline. Ashwagandha's withanolides bind GABA and serotonin receptors, dampening the sympathetic 'fight-or-flight' overdrive that drives chronic stress.
Sleep, mood, and cognition
Meta-analyses report a 22–27% reduction in serum cortisol and significant improvements in sleep onset latency at 300–600 mg daily of a standardized extract. Users typically report calmer evenings, deeper sleep, and steadier daytime focus within 6–8 weeks.
Testosterone, strength, and recovery
Male-focused trials show 14–22% increases in free testosterone, plus improved DEXA-measured lean mass and one-rep-max strength when combined with resistance training. Female participants report improved libido and menstrual cycle regularity.
Nūjeva formulas featuring Ashwagandha
Frequently asked questions
How much ashwagandha should I take?
Clinical studies use 300–600 mg per day of a standardized root extract such as KSM-66. Split doses (morning and evening) tend to produce the smoothest stress response.
When should I take ashwagandha for sleep?
Take it 30–60 minutes before bed. Its GABAergic activity supports faster sleep onset without next-day grogginess.
Is ashwagandha safe for long-term use?
Studies of 12+ months at standard doses show excellent safety profiles. People with autoimmune thyroid conditions or on immunosuppressants should consult their physician.