Sweet Potato

What Sweet Potatoes Provide

Sweet potatoes are root vegetables rich in starch and beta-carotene. The orange-fleshed varieties contain by far the most beta-carotene, while purple varieties are higher in anthocyanins. They provide fibre, potassium, and vitamin C, and their carbohydrate is digested relatively slowly compared with refined starches, particularly when boiled rather than baked.

Nutrition Highlights

Beta-Carotene and Vitamin A

One medium sweet potato provides about 11,509 µg of beta-carotene, converting to roughly 961 µg of vitamin A — well over a day’s requirement. Vitamin A contributes to normal vision, skin maintenance, and immune function.

Fibre

About 3.9 g of fibre per medium sweet potato. Sweet potatoes contain both soluble and insoluble fibre, which may support digestive health and help with satiety.

Potassium

A medium sweet potato supplies roughly 438 mg of potassium. Potassium contributes to normal muscle function and helps balance the effects of sodium on blood pressure.

Vitamin C and Slow-Release Carbohydrate

Around 3.1 mg of vitamin C per potato, though much is lost in prolonged cooking. The starch in sweet potatoes is digested gradually, and boiling produces a lower glycaemic response than baking or frying.

How to Include Sweet Potatoes in a Balanced Diet

• Baked whole and topped with beans, yogurt, or chilli.
• Boiled and mashed as an alternative to white potato.
• Cut into wedges and roasted with paprika and olive oil.
• Added to curries, stews, or soups for body and sweetness.
• Steamed and diced into salads with greens and grains.

Who Might Want to Watch Portions

Sweet potatoes are a carbohydrate source, so people managing blood glucose should count them as part of their carbohydrate intake and prefer boiled or steamed versions over baked or fried. People prone to kidney stones may be advised to moderate intake because sweet potatoes contain oxalates. Very high intakes of beta-carotene can cause harmless orange discolouration of the skin.