Health Benefits
Antioxidant Support from Green Beans
Best studied from a research standpoint is the antioxidant content of green beans. In addition to conventional antioxidant nutrients like vitamin C and beta-carotene, green beans contain important amounts of the antioxidant mineral manganese. But the area of phytonutrients is where green beans really shine through in their antioxidant value. Green beans contain a wide variety of carotenoids (including lutein, beta-carotene, violaxanthin, and neoxanthin) and flavonoids (including quercetin, kaemferol, catechins, epicatechins, and procyanidins) that have all been shown to have health-supportive antioxidant properties. In addition, the overall antioxidant capacity of green beans has been measured in several research studies, and in one study, green beans have been shown to have greater overall antioxidant capacity than similar foods in the pea and bean families, for example, snow peas or winged beans.
Cardiovascular Benefits
Just as you might expect, the antioxidant support provided by green beans provides us with some direct cardiovascular benefits. While most of the cardio research on green beans involves animal studies on rats and nice, improvement in levels of blood fats and better protection of these fats from oxygen damage has been shown to result from green bean intake. Interestingly, the green bean pod (the main portion of the green beans that provides the covering for the beans inside) appears to be more closely related to these cardio benefits that the young, immature beans that are found inside.
While not documented in the health research to date, we believe that the omega-3 fatty acid of content of green beans can also make an important contribution to their cardiovascular benefits. Most people do not even recognize green beans as a source of omega-3 fats! While there is a relatively small amount of the omega-3 fatty acid alpha-linolenic acid (ALA) in green beans, this amount can still be very important and is actually fairly large in comparison to the amount of calories in green beans. You get 1 milligram of ALA for every 4 calories of green beans that you eat. For every 4 calories of walnuts that you eat, you get 1.4 milligrams of ALA. So you can see that green beans—while not as concentrated in ALA as walnuts—are nevertheless an underrated source of this heart-protective nutrient.
Other Health Benefits
The strong carotenoid and flavonoid content of green beans also appears to give this vegetable some potentially unique anti-inflammatory benefits. For example, some very preliminary research in laboratory animals shows decreased activity of certain inflammation-related enzymes—lipoxygenases (LOX) and cyclooxygenases (COX)—following intake of bean extracts. Because type 2 diabetes is a health problem that is known to contain a basic component of chronic, unwanted inflammation, we are also not surprised to see some very preliminary research in the area of green bean intake, anti-inflammatory benefits, and prevention of type 2 diabetes. (The very good fiber content of green beans most likely adds to the potential of green beans to help prevent this common health problem.) We expect to see more research in both of these health benefit areas (anti-inflammatory benefits and prevention of type 2 diabetes).
Posting Komentar