Have any supplements been studied for stroke recovery and prevention?

Certain dietary supplements have been studied for stroke recovery and prevention. Multivitamins and nutrients like vitamin D, calcium, and vitamin C do not seem to prevent stroke. However, folic acid and B vitamin complex do seem to reduce the risk of stroke, especially in geographic locations that lack folic acid food fortification.^[1] Fewer supplements, such as ginkgo and astragalus, have been studied for stroke recovery and evidence is inconclusive at best.^[2][3]