Would people with diabetes benefit from taking chaga mushroom powder both for its antiviral effects and from lowering blood sugar and insulin resistance, as such anti-diabetic activity has been described, or are the latter benefits unappreciated to be a result of its antiviral activity?

The two are not related mechanistically for the near-term and short-term benefits, as have been studied by researchers. Over the long-term, the antiviral effects of chaga would become more visible in further improving glucose management and insulin responses. But chaga truly has both sets of properties inherent in its makeup and the physiologic effects of its ingredients, so that would be an extra bonus to help people significantly further, to achieve a healthier balance.