The common bean (Phaseolus vulgaris), belonging to the order Fabales and the family Leguminosae, encompasses a wide variety of bean types, including the yellow-podded green bean, also known simply as yellow bean or wax bean. It comes in tall-growing (climbing) forms with broad pods, as well as low-growing forms with cylindrical pods. It was already being cultivated around 7000 BC in Peru and other parts of the Americas. It arrived in Europe in the early 1500s, from where it spread further to Africa, Asia, and Australia. Today it is grown in many parts of the world and is one of the vegetables with the broadest nutritional presence and highest internal nutrient values.
The yellow-podded green bean is consumed raw, boiled, steamed, stir-fried in oil, and grilled alike, though its vitamin C content is only retained at a significant concentration when eaten raw in salad form or lightly steamed. It combines excellently as a salad base with tomatoes, carrots, cooked corn, Brussels sprouts, and even cheeses or Shiitake mushrooms to create flavorful, nutrient-rich dishes. Boiling in a small amount of water for 3–5 minutes or microwaving for 6–8 minutes is recommended. Fresh, it keeps in the refrigerator for only 1–2 days, but when freshly frozen and stored at −18°C in a sealed bag, it can be kept for up to 24 months. High-quality quick-frozen green beans do not need to be thawed before boiling or microwaving. The nutritional values of fresh and quick-frozen products are practically identical.
The yellow-podded green bean is 100% paleo, with a low protein content (1–2%) and equally low phytic acid (phytate) content. It does not cause digestive disturbances and is physiologically healthy. Its pod and bean content can be consumed together, making it an exceptionally low-calorie vegetable. Its general nutritional characteristics per 100 g in raw form are as follows:
Energy (kcal): 25–31
Fat (g): 1–5
Total carbohydrates (g): 5–8
of which fiber: 4–7
Protein (g): 1.5–2
100 grams of yellow-podded green bean can cover a significant portion of the recommended daily intake (RDI) of vitamins:
Vitamin A: 20–30%
Vitamin C: 10–12%
Vitamin K: 20–22%
Vitamin B1: 6%
Vitamin B2: 7%
Vitamin B6: 4%
Vitamin B9 (folic acid): 15–20%
Among its mineral and trace element content, the most important in terms of daily recommended intake are:
Calcium (Ca): 5–8%
Iron (Fe): 8–10%
Magnesium (Mg): 6–8%
Copper (Cu): 3–4%
Manganese (Mn): 10–12%
Phosphorus (P): 5–7%
Potassium (K): 16–18%
Zinc (Zn): 3–4%
Chromium (Cr): 5–6%
It is worth highlighting that the yellow-podded green bean is one of the best dietary sources of mineral silicon, which plays a very important role in bone health and the normal formation of connective tissues. As such, its consumption is particularly beneficial and recommended for women of menopausal age and beyond, in terms of reducing the risk of osteoporosis (bone loss).
Yellow beans are an especially good source of dietary fiber, as 100 g can cover 10–15% of the recommended daily intake. Dietary fiber is fundamentally important for intestinal health and cholesterol level regulation. In addition, it is an excellent source of carotenoids — its β-carotene, zeaxanthin, and lutein content is high — which plays a fundamental role in addressing age-related eye problems (e.g., retinal protection) and meeting vitamin A requirements. The flavonoid components of yellow-podded beans (quercetin, kaempferol, epi(−)catechin, pro-anthocyanidins) also significantly support the optimal functioning of our body’s antioxidant defense systems.
Its low but important fat content is characterized by the absence of saturated fatty acids, while containing omega-3 fatty acids (100 g covers 5–7% of the recommended daily intake), which is important for our cardiovascular health. Among vegetables, the yellow-podded green bean — with its high antioxidant capacity — can reduce the risk of cardiovascular (coronary) disease, lower blood pressure, and reduce cholesterol levels.
Regular consumption of yellow-podded green bean dishes — prepared in a healthy manner — is particularly recommended and important for pregnant women in terms of fetal health (due to its folic acid and iron content). In diabetic patients, it may help reduce blood sugar levels through its hypoglycemic effect and the regulation of metabolic processes. Based on current scientific data, the yellow bean is a “true natural regulatory substance” that may help reduce the risk of inflammatory processes and maintain a healthy immune system.
Its characteristic phytoestrogen (isoflavone) content may reduce menopausal symptoms in women. It has a mild diuretic effect. Some studies suggest that regular consumption may be beneficial in preventing the development of colorectal polyps and inhibiting adenomas. Increased consumption requires caution in individuals prone to oxalate-type kidney stone formation, due to its oxalic acid content.
The yellow-podded green bean is a vegetable of outstanding qualities. This is further evidenced by the fact that in the United States, every year on June 4th, a “National Green Bean Day” is observed. Its regular consumption is a supporter of our health. As with all of our company’s products, it is not only delicious and healthy, but its regular consumption contributes to the preservation of good health.
Prof. Dr. Zoltán Dinya
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