The Sweet Potato Mystery: What You’re Really Buying

Did you know that the “sweet potatoes” we often purchase at the store may not actually be sweet potatoes at all? This might come as a surprise to many, as we commonly refer to them as such. However, what you’re buying is often a different vegetable entirely.

The confusion stems from the fact that many of the orange-fleshed tubers found in grocery stores are actually yams, not sweet potatoes. Though they share a similar taste and appearance, sweet potatoes and yams are distinct species with different origins and characteristics.

Sweet Potatoes vs. Yams

Sweet potatoes (Ipomoea batatas) are native to Central and South America and come in various colors, including orange, white, and purple. They have a sweet flavor and a smooth, thin skin. Sweet potatoes are also known for their nutritional benefits, providing high levels of vitamins A and C, fiber, and antioxidants.

On the other hand, yams (Dioscorea species) are native to Africa and Asia. They have a rough, starchy skin and are generally less sweet than sweet potatoes. Yams can grow quite large and have a more dry, starchy texture compared to the creaminess of sweet potatoes.

Why the Confusion?

The mix-up between sweet potatoes and yams in grocery stores can be attributed to historical and regional differences. In the United States, particularly in the southern regions, the term “sweet potato” has been used to describe both sweet potatoes and yams due to their similar appearance and culinary uses.

This confusion is further compounded by marketing and labeling practices. In many stores, what is labeled as a “sweet potato” might actually be a yam, especially if it’s the orange-fleshed variety. To further complicate matters, certain varieties of sweet potatoes are often referred to as “yams” in the U.S. This practice can lead to misunderstanding and misinformation about what consumers are actually purchasing.

Understanding Labels

To accurately identify sweet potatoes and yams, it’s important to check the labels and understand their botanical distinctions. Sweet potatoes are usually labeled as such, while yams might be labeled under their specific names. Additionally, the texture and taste of the tubers can offer clues—sweet potatoes will be sweeter and smoother, while yams will be drier and starchier.