Scientific Name: Dioscorea alata
Other name: Ube or greater yam
Description: Purple yam is a tuberous root vegetable known for its striking purple color. It's a staple in various cuisines, particularly in Asian and African countries and have numerous health benefits. They are a versatile and nutritious addition to the diet, offering both medicinal and culinary benefits. They can be boiled, baked, roasted, or added to desserts like cakes and sweet pastries due to their naturally sweet taste and vibrant color. The skin is rough, greyish-brown; while the heart-shaped leaves grow on slender stems rising from long, creeping vines.
Parts Used:
Tuber (Root): The most commonly used part of the purple yam for medicinal purposes. It's rich in nutrients and antioxidants.
Medicinal Uses and Properties:
Antioxidant Properties: Purple yams are high in antioxidants, which help combat oxidative stress and may reduce the risk of certain chronic diseases.
Anti-inflammatory Effects: They may help reduce inflammation in the body, which is beneficial for conditions like arthritis.
Blood Sugar Regulation: Some studies suggest that purple yam can help in managing blood sugar levels, making it beneficial for diabetic patients.
Digestive Health: Being a good source of fiber, purple yams can promote healthy digestion and prevent constipation.
Nutrition Profile:
Rich in carbohydrates, fiber, vitamins (especially vitamin C and some B vitamins), and minerals (like potassium, manganese, and copper). Low in fat.
Health Benefits:
Cardiovascular Health: The fiber and antioxidants in purple yam can contribute to heart health by lowering cholesterol levels and improving circulation.
Immune Boosting: Its high vitamin C content supports the immune system.
Skin Health: Antioxidants in purple yams, like anthocyanins, may benefit skin health by preventing signs of aging and improving skin texture.
Cancer Prevention: Early research suggests that the antioxidants in purple yam may have anti-cancer properties, although more research is needed in this area.
Bone Health: Purple yams are a good source of minerals like zinc and magnesium, which are important for bone health.
Weight Management: The fiber content in purple yams can promote a feeling of fullness, potentially aiding in weight control.
Precautions:
While purple yams are generally considered safe, excessive consumption can lead to gastrointestinal issues due to their high fiber content.
People with a history of oxalate-containing kidney stones should consume them in moderation, as yams contain oxalates. The leaves, stems, petioles of Dioscorea alata are not edible. Only the flesh of the tuber is edible.