Evidence Comparison
Inositol (Myo-Inositol) vs Ashwagandha (KSM-66)
For anxiety — which one has better evidence?
🏆 Winner for anxiety
Ashwagandha (KSM-66)
Scores 65% vs 55% in evidence strength
Head-to-Head Comparison
2-4g per day for PCOS; 12-18g per day for anxiety/panic disorder
300-600mg KSM-66 per day (or 250-600mg Sensoril)
Divided into 2-3 doses throughout the day
Evening for sleep benefits, or split doses (morning and evening) for all-day stress management
Myo-inositol powder
Standardized root extract
$15-40 (depending on dose)/mo
$15-30/mo
3 studies
3 studies
Evidence for anxiety
Inositol (Myo-Inositol)
55%Several studies suggest high-dose inositol (12-18g/day) reduces panic attacks and anxiety symptoms, comparable to fluvoxamine in some trials, though not all studies are positive.
Ashwagandha (KSM-66)
65%Multiple RCTs show significant reductions in anxiety scores (Hamilton Anxiety Scale, DASS) compared to placebo, with moderate effect sizes.
Mechanism of Action
Inositol (Myo-Inositol)
Inositol functions as a second messenger in several neurotransmitter pathways, including serotonin and dopamine receptors. In the brain, it modulates the phosphatidylinositol signal transduction system, which is involved in serotonergic neurotransmission — the same system targeted by SSRIs. This may...
Read full review →Ashwagandha (KSM-66)
Ashwagandha modulates the hypothalamic-pituitary-adrenal (HPA) axis, which governs the body's stress response. By attenuating cortisol secretion, it reduces the physiological cascade of chronic stress. Withanolides appear to mimic GABA at GABA-A receptors, producing anxiolytic effects similar to but...
Read full review →⏱️ Time to Effect
Inositol (Myo-Inositol)
Insulin sensitization beginning. Menstrual regularity changes not yet visible.
PCOS: menstrual cycles may begin regularizing. Panic disorder: anxiety reducing.
Ovulation restored in some PCOS patients. Insulin resistance measurably improved.
Full PCOS management benefits. Testosterone levels decreasing in hyperandrogenic women.
Ashwagandha (KSM-66)
Typically nothing noticeable. Cortisol modulation beginning at cellular level.
Stress resilience improves. May notice feeling less reactive to daily stressors.
Full anxiolytic effect. Cortisol reduced 15-25%. Sleep quality improved.
Peak effects. Evaluate if continuing — cycle off for 2-4 weeks recommended.
🤝 Can You Take Both?
✅ These can generally be taken together safely. Many people stack both for complementary effects.
However, always start one at a time so you can identify which is responsible for any effects you notice.
📋 The Bottom Line
Choose Inositol (Myo-Inositol) if:
- ✓ women with PCOS
- ✓ individuals with panic disorder
- ✓ those with anxiety who prefer non-pharmaceutical options
Choose Ashwagandha (KSM-66) if:
- ✓ chronically stressed adults
- ✓ those with generalized anxiety
- ✓ people with stress-related sleep difficulties