Salvestrols are part of our everyday diet and always have been, so they are entirely safe.
Salvestrol is made from organically grown fruit. Mostly they are extracted in high concentrations from tangerine or orange peel and blueberries, and mixed with concentrated blackberry and strawberry powder.
None of the fruits used have been genetically modified, or treated with pesticides or anti fungal agents. Because the ingredients are 100% natural and encased in vegetable capsules there is no known toxicity, even for diabetics.
However, as a precaution, Salvestrol should not be taken by pregnant women and breast-feeding mothers.