Many people view sweet potatoes as simply a type of potato that can add a bit of extra flavor. However, recent research reveals that sweet potatoes offer a wide range of unique nutritional benefits.
Readily available, affordable, and easy to grow, sweet potatoes have been an important staple for Americans throughout history, helping sustain them during challenging times such as the colonial era, Revolutionary War, Civil War, and Great Depression.
There are about 400 varieties of sweet potatoes, with skin and flesh ranging in color from almost white, cream, and yellow to orange, pink, and deep purple. The most common flesh colors are white/cream and yellow-orange. The sweetness, flavor, texture, and nutrient content vary across these varieties.
Known commonly as sweet potato, they are referred to in Nigeria as ba-fadamee in Hausa, ediam-umani in Ibibio, ji-bekee or nduku in Ibo, and anamo or odukun in Yoruba.
According to the USDA’s national nutrient database, sweet potatoes are rich in fiber, minerals, and vitamins, including Vitamin B6, Vitamin C, potassium, iron, magnesium, calcium, and Vitamin D.
Orange-fleshed varieties are especially rich in carotenoids, antioxidants that serve as precursors to Vitamin A. Vitamin A is crucial for healthy eyesight, a strong immune system, cancer prevention, and slowing the effects of aging.
Studies have shown sweet potatoes’ remarkable ability to raise blood levels of Vitamin A, particularly benefiting children. Research from Africa indicates that a 3.5-ounce serving of sweet potatoes can provide between 100 and 1,600 micrograms (RAE) of Vitamin A, which can fulfill 35–90% of daily requirements.
Harvard University research involving over 124,000 people found that diets rich in carotenoid-containing foods were associated with a 32% lower risk of lung cancer.
The natural sugars in sweet potatoes, according to nutritionist Mrs. Simisola Adebola, are beneficial for individuals with type 2 diabetes because they are released slowly into the bloodstream, promoting steady energy levels without causing spikes in blood sugar.
Adebola also noted that the soluble fiber in sweet potatoes, such as pectin, increases satiety, reduces food intake, and slows digestion of sugars and starches, helping to regulate blood sugar levels.
Sweet potatoes are also rich in Vitamin B6, which helps lower homocysteine levels in the body, a chemical linked to heart attacks.
Additionally, consuming sweet potatoes can support eyesight, enhance immunity, regulate heartbeat and nerve signaling, reduce inflammation, control kidney function, aid red and white blood cell production, assist protein metabolism, and help the body manage stress.
Beta-carotene from sweet potatoes is vital during pregnancy and lactation for hormone synthesis. Harvard Medical School reports that plant-based iron consumption may promote fertility in women of childbearing age.
Foods high in beta-carotene may also reduce the risk of certain cancers, protect against asthma and heart disease, and slow aging and tissue degeneration.
Some nutritional benefits of sweet potatoes are better preserved when boiled or steamed. Studies comparing boiling and roasting have found boiling may be better for blood sugar management.
Recent research from Japan, published in the Journal of Agriculture, Food and Chemistry, suggests that sweet potatoes may lead to novel treatments for cancer and diabetes. Extracts from the leaves and tubers of white sweet potatoes were found to inhibit the growth of human cancer cells.
