"Adaptogen" is one of the most abused words in wellness — applied to almost any plant with a calming reputation. But one botanical has earned the label through repeated human trials: ashwagandha (Withania somnifera), and specifically the standardised root extract KSM-66®.
Key takeaways
- In a randomised, placebo-controlled trial, 600 mg/day KSM-66 reduced serum cortisol by ~27.9% over 60 days.
- The effect is on the stress-response system (HPA axis), not sedation — users report calm focus, not drowsiness.
- Dose and standardisation matter: the studied benefit comes from a specific extract at a specific dose.
What cortisol actually does
Cortisol isn't the enemy. It follows a daily curve — high in the morning to wake you, falling through the day to let you sleep. Chronic stress flattens and elevates that curve: cortisol stays high when it should drop. The result is the familiar "tired but wired" state, poor sleep, and slow recovery.
What the trial showed
In the most cited study (Chandrasekhar et al., 2012), 64 chronically stressed adults took either 300 mg KSM-66 twice daily or placebo. After 60 days, the ashwagandha group showed a 27.9% reduction in serum cortisol versus placebo, alongside improvements in perceived stress scores. Subsequent studies in the KSM-66 programme have reported benefits for sleep onset and quality.
How we use it
Ashwagandha sits at the centre of the AETHERA RESTORE protocol, paired with magnesium and L-theanine for complementary nervous-system support. We use the studied 600 mg/day KSM-66 dose — not a token amount behind a proprietary blend.
The protocolAETHERA RESTORE →References
- Chandrasekhar K, et al. A prospective, randomized double-blind, placebo-controlled study of safety and efficacy of a high-concentration full-spectrum extract of ashwagandha root. Indian J Psychol Med. 2012.
- Langade D, et al. Efficacy and safety of ashwagandha root extract in insomnia and anxiety. Cureus. 2019.
This article is for education and is not medical advice. Food supplements are not intended to diagnose, treat or prevent any disease.