VascuStatin Formula is convolvulis arvensis extract (common name, field bindweed). Memorial Sloan Kettering Cancer Center has great information about supplements, the evidence and risks of supplements and their relevance for cancer patients. (Thank you @clpc for bringing this to my attention.)

Here is the great information from MSKCC on convolvulis arvensis. https://www.mskcc.org/cancer-care/integrative-medicine/herbs/convolvulis-arvensis

"Leaf extract of Convolvulis arvensis, also known as field bindweed, may stop the growth of new blood vessels. However, research is very limited and it has not been studied in humans.

Field bindweed is an invasive weed found in many parts of the world. It has been used in traditional medicine, and extracts from the leaves are sold as dietary supplements.

Lab studies suggest that these extracts may stimulate the immune system and stop the growth of new blood vessels. A few animal studies suggest it may also reduce tumor size in mice. However clinical trials have not been conducted, so whether this effect could occur in humans is not known. In addition, there could be adverse effects. For instance, because these extracts may affect the growth of new blood vessels, they may also interfere with wound healing."