Only standardized forms (KSM-66 or Sensoril) have consistent RCT evidence. Non-standardized root powder · pure concentration lottery.
≥5% withanolides · pure root
Best for
Ideal use: 80% of cases · solid human evidence + confirmed long-term safety.
Advantages
Form with MOST human RCTs on market (24+). Full-spectrum extraction without alcohol. Cardio-metabolic + cognitive + sleep + testosterone studies. Gold standard.
Disadvantages
Expensive vs standard ashwagandha (~15-25 €/month). Lower withanolides concentration than Sensoril (but more data).
≥10% withanolides · root + leaf
Best for
Ideal use: patients wanting effective low dose · sensitive to large capsules.
Advantages
Withanolides concentration 2× KSM-66 · lower dose (250 mg = 600 mg KSM-66). Own RCT evidence in stress and cognition. Prestige brand in India.
Disadvantages
Fewer RCTs than KSM-66 (~8-10 vs 24+). Leaf inclusion debate · some purists prefer traditional root only.
Non-standardized · variable
Best for
Ideal use: none · false savings · pay 5× less for supplement that may have 50× less active compound.
Advantages
Cheaper (~5-10 €/month). Traditional. Useful if you tolerate well and have clear response.
Disadvantages
Withanolides concentration VARIES 0.1-5% by batch · clinical effects NOT replicable. Zero specific RCT evidence for non-standardized form.
Ideal use: 80% of cases · solid human evidence + confirmed long-term safety.
Ideal use: patients wanting effective low dose · sensitive to large capsules.
Ideal use: none · false savings · pay 5× less for supplement that may have 50× less active compound.
Only standardized forms (KSM-66 or Sensoril) have consistent RCT evidence. Non-standardized root powder · pure concentration lottery.