Ashwagandha is one of the most heavily marketed nervous-system supplements on the market, and — unusually for a herb with that much marketing behind it — the human trial evidence for stress and cortisol is genuinely strong. It's also an ingredient where the specific extract matters far more than the name on the front of the bottle. Here's what the research actually shows, and why the Proco version of this product is still in development rather than on the shelf.
What the trials show
A 2021 systematic review pooled seven randomized, placebo-controlled human trials covering 491 adults, all using ashwagandha for six to eight weeks.1 Across those trials, ashwagandha significantly reduced self-reported stress and anxiety levels compared to placebo, and — importantly, because this is an objective, measurable biomarker rather than a self-report — significantly reduced serum cortisol levels compared to placebo. A separate randomized, placebo-controlled trial measuring stress-relieving and pharmacological effects of a high-concentration ashwagandha extract found consistent results using validated stress-scale and cortisol measurements.2 A further randomized, double-blind, placebo-controlled trial in healthy, stressed adults extended the picture to cognitive function, finding measurable improvements on tasks related to attention and processing speed alongside the stress reduction.3 A separate meta-analysis of five trials (372 adults) found a small but statistically significant improvement in sleep quality, with the effect more pronounced at higher doses and longer duration of use.1
The part that gets lost in translation: extract matters
Here's the detail that most ashwagandha marketing glosses over. Of the seven trials in that 2021 review, three used a specific standardized root extract called KSM-66, two used a different standardized root-and-leaf extract (Sensoril/Shoden), and one used plain whole-root powder at a much higher dose (12,000mg/day, roughly equivalent to 6,000mg of powder) to get a comparable effect.1 Doses studied ranged from 240mg to 1,250mg/day of extract, and the review specifically noted that benefits were more consistent at 500-600mg/day than at lower doses. In other words: "ashwagandha" on a label is not one thing. A capsule of generic root powder at an arbitrary dose is not equivalent to the standardized, tested extracts that produced these results — the plant species is the same, but the concentration of active withanolides, and therefore the dose that was actually studied, is not.
Why Proco's ashwagandha isn't live yet
This is a straightforward sourcing problem, not an evidence problem. Ashwagandha clears our evidence bar clearly — multiple independent RCTs, consistent effect sizes, an objective biomarker (cortisol) backing up the subjective stress-scale data. But per our own standard, that clearance is specific to the standardized extracts actually used in the trials (KSM-66 or Sensoril/Shoden), not to ashwagandha root powder generally. We have a draft product in development, and it stays in draft until we can source the specific studied extract, at the studied dose, with a certificate of analysis confirming what's actually in the capsule — the same bar every other product on the site had to clear before it got a listing.
References
- "Ashwagandha: Is it helpful for stress, anxiety, or sleep?" Office of Dietary Supplements, National Institutes of Health. ods.od.nih.gov
- "An investigation into the stress-relieving and pharmacological actions of an ashwagandha (Withania somnifera) extract: A randomized, double-blind, placebo-controlled study." PubMed, 2019. pubmed.ncbi.nlm.nih.gov
- "Efficacy and Safety of Ashwagandha Root Extract on Cognitive Functions in Healthy, Stressed Adults: A Randomized, Double-Blind, Placebo-Controlled Study." PubMed, 2021. pubmed.ncbi.nlm.nih.gov
This article is for informational purposes only and has not been evaluated by the FDA. It is not intended to diagnose, treat, cure, or prevent any disease. Speak with a healthcare provider before starting any new supplement, especially if you take medication or have an existing health condition.
Proco only sells single-ingredient supplements dosed to the level used in the human trials that support them — and we'd rather stay in draft than ship a version that doesn't match the studied extract. Explore the current range at procohq.com.