Convolvulis arvensis, commonly known as field bindweed, is a plant that belongs to the morning glory family. It is a perennial vine with white to pink flowers that can be found in temperate regions. The leaf extract is marketed as a dietary supplement to support vascular health by restricting new blood vessel growth. Related products are promoted as a natural cancer treatment, as well.
In vitro and animal studies show that water extracts from the plant’s aerial parts are rich in proteoglycans and have antiangiogenic and immune-stimulating effects. Other studies found that these constituents also increased vasodilation and circulatory function, and lowered blood pressure in animals. Alkaloids from raw field bindweed are toxic to animals, but dietary supplements are alkaloid-free.
Due to its ability to inhibit new blood vessel growth, C. arvensis should not be used before and after surgery. Infants, children, adolescents, and pregnant women should also avoid this product.
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.
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