Firstly, you need to ensure that he is consuming Ashwagandha root extract only, the leaves and other parts are known to be toxic to the
liver.
Even the root extract can be used for a duration of a month or 2 max, then a break of 3-4 months is needed.
Next Steps
i have Conducted a randomised controlled trial with Ashwagandha root extracts. Hence, i know more than a little about it.
Health Tips
ashwagandha has no indication for use for hypertension,
diabetes and IHD. so, in short it is of no use to him, rather risk of
liver damage exists.