Ashwagandha: What The Research Actually Shows

What it's traditionally used for

An adaptogenic herb used in Ayurvedic medicine for centuries, traditionally associated with stress resilience, energy, and vitality — modern research has started examining several of these traditional claims more rigorously.

The evidence on stress and cortisol

Several controlled studies have found modest reductions in perceived stress and cortisol levels with consistent supplementation over 6-8 weeks — one of the better-supported claims associated with the herb.

The evidence on strength and muscle

Some studies suggest a modest benefit for strength and muscle recruitment when combined with resistance training, though the effect size is generally smaller than more established supplements like creatine.

Safety and who should be cautious

Generally well-tolerated in studied doses, but people with thyroid conditions, autoimmune disorders, or those who are pregnant should consult a doctor first, since ashwagandha can interact with thyroid function and certain medications.