I always thought this was the case

Sweet potatoes and regular potatoes are both staple foods in many cultures around the world. While they share a similar name and are both tuberous vegetables, sweet potatoes belong to the Convolvulaceae family, whereas regular potatoes are part of the Solanaceae family. This fundamental difference sets the stage for a distinct nutritional and health profile for each. Sweet potatoes are known for their naturally sweet flavor and vibrant orange color, attributed to their high beta-carotene content, while regular potatoes offer a more starchy and creamy texture. Both varieties provide a rich source of carbohydrates but differ in other nutritional aspects, which can influence the choice between the two based on health goals and dietary preferences.

Sweet potatoes are highly nutritious, offering a wealth of vitamins and minerals. A typical serving size (around 100 grams) of cooked sweet potatoes contains approximately 86 calories, primarily from carbohydrates. They are rich in dietary fiber, with about 3 grams per serving, and are a significant source of vitamins, particularly vitamin A, due to their beta-carotene content. Sweet potatoes also provide important micronutrients such as vitamin C, manganese, and potassium, along with smaller amounts of several B vitamins.

Regular potatoes are also a nutritious option, with a 100-gram serving providing about 77 calories, mainly from carbohydrates. They are slightly lower in fiber than sweet potatoes, offering about 2 grams per serving. Regular potatoes are a good source of vitamin C and also supply potassium and vitamin B6. They contain more iron compared to sweet potatoes, which can be beneficial for addressing iron deficiencies.