Ashwagandha: a complete guide

June 15, 2026⏱ 14 min

🎯 Quick verdict

If you need energy, focus and protection from stress during the day, choose KSM-66 at a dosage of 600 mg. If you suffer from insomnia and night anxiety, your choice is Sensoril (125-250 mg in the evening). Take courses for 8-12 weeks with a break of 2-4 weeks.

What is ashwagandha and why is everyone talking about it?

Ashwagandha (Withania somnifera) is the flagship plant of Ayurvedic medicine, with a history of use dating back over 3000 years. Translated from Sanskrit, the name means “the smell of a horse,” which alludes to the traditional promise of giving a person “horse” strength and endurance.

Today, ashwagandha is officially recognized as a powerful adaptogen - a substance that helps the body adapt to stress without causing addiction. It is one of the most researched plant extracts in the world.

How ashwagandha breaks the stress mechanism: scientific analysis

When we are faced with chronic stress, the adrenal glands continuously release cortisol. High cortisol destroys muscles, accumulates belly fat, suppresses the immune system and “burns out” the nervous system.

1. Direct cortisol suppression

Meta-analysis showed a decrease in cortisol by 11-32% over 60 days. This is comparable to prescription anxiolytics, but without the side effects.

2. Activation of the GABA system

Withanolides bind to GABA receptors, reducing excessive neuronal activity. The result is calmness without inhibition.

3. Reduced inflammation

Ashwagandha reduces levels of C-reactive protein (CRP), a major marker of inflammation. Less inflammation = less fatigue and pain.

4. Thyroid support

Gently stimulates the production of hormones T3 and T4, helping with latent hypothyroidism. Contraindicated for hyperthyroidism!

Extract Battle: KSM-66 vs Sensoril

Raw root powder contains only 1-1.5% withanolides - this is useless. There are two leaders on the market:

KSM-66 - daytime adaptogen

The most studied extract in the world (24+ studies). Standardization: 5% withanolides. Only the root.

Dosage: 300-600 mg in the morning and/or lunch
Effect:energy, focus, memory, testosterone, libido
For whom:people who need to be productive under pressure

Sensoril - night calmer

Mega concentration: 10% withanolides. Root + leaves. Powerful sedative effect.

Dosage: 125-250 mg in the evening 1-2 hours before bedtime
Effect:deep relaxation, anti-anxiety effect
For whom:those suffering from insomnia and night anxiety

How to take it correctly: dosages and courses

Dosing

KSM-66: Start with 300 mg in the morning. If necessary, +300 mg at lunch. Maximum - 1000 mg/day
Sensoril: 125-250 mg in the evening during dinner or an hour before bed

Course duration

Optimal: 8-12 weeks. Adaptogens have a cumulative effect - full strength by the 4th week. This is a marathon, not a sprint.

Why do you need a break?

After the course there is a break of 2-4 weeks. The body gets used to the stimulation of GABA receptors, a break returns sensitivity.

What to combine with?

Magnesium glycinate (evening) - enhances relaxation and sleep
L-Theanine (daytime) - calm concentration without anxiety
Omega-3 - reduces inflammation
Vitamin D3 - synergy for immunity

Take with fatty foods - withanolides are fat soluble.

Contraindications

Absolute contraindications

Hyperthyroidism - stimulates the production of T4, dangerous with increased function
Pregnancy and lactation - may cause uterine contractions
Autoimmune diseases - can aggravate MS, lupus, rheumatoid arthritis

Carefully combine with:

Hypnotics and tranquilizers - mutual reinforcement to the point of dangerous drowsiness
Thyroid medications—may change dosage requirements
Immunosuppressants - ashwagandha stimulates the immune system

Novird expert summary

Don't look for "just ashwagandha." The label must contain KSM-66 or Sensoril.

For daytime stress: KSM-66, 600 mg, divided into two doses.

For insomnia: Sensoril, 125 mg one hour before bedtime.

Golden Rule: Give ashwagandha 4-6 weeks before evaluating results. And don’t forget about breaks between courses!

KSM-66	Sensoril	Criterion	Raw powder
Root only	Root + leaves	Part used	Chopped root
5%	10%	Withanolides	1-1.5%
300-600 mg/day	125-250 mg/day	Working dosage	3000-5000 mg/day
Morning/afternoon	Evening	Best appointment time	During the day
Energy, focus, sport	Deep sleep, panic relief	Main Focus	Weak effect
24+ studies	good	Scientific base	Minimum
★★★★★ BEST	★★★★☆ For sleep	Recommendation	★★☆☆☆ No

← Прокрутите таблицу вправо →

Frequently asked questions

What dose of ashwagandha is needed?↓

The standard dose is 300–600 mg of KSM-66 extract per day (standardized to withanolides). This is the most studied dosage in research. It can be taken at once or split into two doses (morning+evening) for a more even effect.

How long until ashwagandha starts working?↓

Mild calming may be felt within a few days. But the main effect — lowering cortisol (on average by 27% in studies), improving sleep and stress resilience — develops over 4–8 weeks of regular use. It's not a quick effect but a cumulative one.

When is it best to take ashwagandha?↓

With food, to avoid stomach discomfort. If splitting the dose — morning and evening. For sleep, some take it in the evening. KSM-66 doesn't cause daytime drowsiness, so morning works too.

Can you take ashwagandha continuously?↓

Studies confirm safety for up to 3 months of continuous use. Long-term data is limited, so cycles are often recommended (e.g. 8 weeks on, 1–2 weeks off). This reduces the risk of tolerance and gives the body a break.

Who should not take ashwagandha?↓

Use caution with thyroid conditions (it may raise hormones), autoimmune diseases, or when taking sedatives. Not recommended for pregnant or breastfeeding women due to lack of data. With any chronic conditions, consult a doctor.

Sources and studies

Effects of Ashwagandha (Withania Somnifera) on stress and anxiety: A systematic review and meta-analysis — Complementary Therapies in Medicine, 2024↗
Effects of Ashwagandha Supplements on Cortisol, Stress, and Anxiety Levels in Adults: A Systematic Review and Meta-Analysis — BJPsych Open, 2025↗

⚠️ This information is for educational purposes only and is not medical advice. Supplements are not medicines and are not intended to diagnose, treat, or prevent any disease. Consult a doctor before starting any supplements, especially during pregnancy, breastfeeding, chronic conditions, or while taking medications.