Ashwagandha is a botanical ingredient studied for its potential effects on stress, sleep, and aspects of physical well-being. Some clinical studies have also examined its relationship with testosterone and reproductive health.
What does the research say?
Certain studies have reported improvements in stress-related measures and some reproductive or hormonal outcomes following ashwagandha supplementation. Limited evidence suggests that some preparations may affect testosterone levels or sperm quality. However, studies have generally been small and have used different extracts, doses, and populations.
These findings cannot automatically be applied to every ashwagandha supplement. The available evidence does not establish ashwagandha as a reliable treatment for low testosterone.
Safety considerations
Ashwagandha may cause drowsiness, stomach upset, diarrhoea, or vomiting. Rare cases of liver injury have also been reported, and long-term safety remains insufficiently established.
It may interact with medicines for diabetes, high blood pressure, thyroid conditions, and immune suppression, as well as sedatives and some anticonvulsants. It may not be appropriate for people with thyroid or autoimmune disorders, liver conditions, or hormone-sensitive prostate cancer. It should be avoided during pregnancy and is not recommended during breastfeeding.
Anyone taking medication or managing a medical condition should consult a healthcare professional before using it.
Key takeaway: Ashwagandha has promising but limited evidence for certain aspects of stress and well-being. Its effects on testosterone remain uncertain, and its suitability depends on individual health circumstances.