Dosage
Most trials used 300 mg to 600 mg per day of a standardized root extract, often for 8 to 12 weeks. KSM-66 and Sensoril are common standardized forms. Take it consistently, and ask your healthcare provider what is right for you.
Ingredient guide
Uncover Ashwagandha Root Benefits: Enhance Your Wellness Today
Ashwagandha is an adaptogenic herb with growing research behind it, especially for stress and sleep. We cover its best-supported benefits, sensible doses, and who should be cautious.
Moderate evidenceBenefits
- Has the strongest evidence for helping the body cope with everyday stress.
- Several trials report better sleep quality with regular use.
- May help support a calm, steady mood in stressed adults.
- Studied for modest gains in strength and recovery alongside training.
- Provides antioxidant withanolides as its active compounds.
Evidence summary
What ashwagandha is
Ashwagandha (Withania somnifera) is a small evergreen shrub used in Ayurvedic tradition for thousands of years. The root is the part used in most supplements, concentrated into a standardized extract. It is classed as an adaptogen, a plant thought to help the body adapt to physical and mental stress. Its active compounds are called withanolides.
Stress and sleep
This is where ashwagandha has its best evidence. Multiple randomized trials report lower stress ratings and lower cortisol, the main stress hormone, after several weeks of daily use. Many of the same studies note better sleep quality and an easier time winding down. The effect sizes are modest but consistent enough to take seriously.
Other studied benefits
Beyond stress, ashwagandha has been studied for strength and exercise recovery, with some trials showing small gains in muscle and performance alongside training. Research in men has looked at testosterone and fertility, with mixed early results. These uses are promising but less settled than the stress and sleep findings.
What to know about safety
- Avoid it in pregnancy and while breastfeeding.
- Use caution with thyroid or autoimmune conditions.
- It can add to sedatives, so combine carefully.
- Rare liver effects have been reported, so stop if you feel unwell.
How to take it
A typical dose is 300 mg to 600 mg of a standardized root extract daily, taken with food for at least 8 weeks. Evening doses suit people using it for sleep. Branded extracts like KSM-66 and Sensoril have the most published research. As with any supplement, talk with your healthcare provider first, especially if you take medication or have a health condition.
Dosage & safety
Side effects
- Ashwagandha is generally well tolerated in short trials.
- Some people notice drowsiness, stomach upset, or loose stools.
- Rarely, it has been linked with thyroid or liver effects at high doses.
Interactions
- Ashwagandha may add to sedatives and sleep medication.
- Discuss thyroid, blood-sugar, and immune medications with your provider before use.
Warnings
- Speak with a healthcare provider before taking ashwagandha if you are pregnant, breastfeeding, take thyroid or sedative medication, or have an autoimmune condition.
- Ashwagandha is a supplement, not a substitute for care your doctor provides.
- Supplement quality varies between brands, so choose third-party tested products with a clear certificate of analysis.
Related ingredient guides
Citations
- Ashwagandha: benefits, uses, and side effects healthline.com
- Ashwagandha research summary examine.com
- Ashwagandha drug and supplement overview mayoclinic.org
Frequently asked questions
What is ashwagandha best for?
Its strongest evidence is for stress and sleep. Other uses, like strength or testosterone, are promising but less proven.
How long does ashwagandha take to work?
Most trials ran 8 to 12 weeks. Stress and sleep effects build gradually, so give it at least two months.
Is ashwagandha safe long term?
Short trials look reassuring, but long-term data is limited. Take breaks if you wish and check in with a provider for extended use.
Who should avoid it?
Anyone pregnant or breastfeeding, and people with thyroid or autoimmune conditions, should avoid it or check with a provider first.