Ashwagandha: Benefits, Dosage, and What You Need to Know Before Taking It
Ashwagandha (Withania somnifera) has exploded in popularity as a natural supplement for stress, sleep, and overall well-being. But does the science support the hype, and what should you watch out for? Here’s a comprehensive, balanced look at this ancient adaptogen.
What Is Ashwagandha?
Ashwagandha is an evergreen shrub native to India, the Middle East, and parts of Africa. It has been used in Ayurvedic medicine for over 3,000 years as a rasayana (rejuvenating tonic). The name literally means “smell of horse,” referring both to the root scent and the belief that it gives you the strength of a stallion.
Scientifically Supported Benefits
- Stress and cortisol reduction — Multiple studies show 14-28% reduction in cortisol levels
- Improved sleep quality — Particularly effective for people with insomnia
- Enhanced physical performance — Increased VO2 max and muscle strength in clinical trials
- Cognitive function — May improve memory, reaction time, and task performance
- Thyroid support — Can increase T3 and T4 levels (important caution for hyperthyroid patients)
Recommended Dosage
Most clinical studies use 300-600mg of root extract (standardized to 5% withanolides) taken daily. KSM-66 and Sensoril are the two most well-researched branded extracts. Start with a lower dose and increase gradually over 1-2 weeks.
Important Precautions
- Thyroid conditions — Can increase thyroid hormone levels; avoid if hyperthyroid
- Autoimmune diseases — May stimulate the immune system; use caution with lupus, RA, etc.
- Pregnancy — Not recommended during pregnancy
- Medications — May interact with thyroid drugs, immunosuppressants, and sedatives
- Liver concerns — Rare cases of liver injury reported; choose reputable brands and cycle usage
Disclaimer: Consult your healthcare provider before starting any supplement. Originally adapted from Korean content.