The Truth: Sweet potatoes are carbohydrate-dense and have a higher glycemic index than leafy greens. But that doesn’t make them unhealthy.
One medium sweet potato contains about 20-27g of carbohydrates . Their glycemic index (GI) can range from 44 (lower) for some varieties to 70 (higher) for others, depending on preparation and variety .
However, the Blue Circle Diabetes Foundation notes that the fiber content in sweet potatoes helps moderate the rate of absorption, reducing the potential for high post-meal blood sugar spikes . They also provide valuable nutrients like vitamin A, vitamin C, and manganese.
The key is preparation and pairing.
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Don’t eat them alone: “Pair your sweet potatoes with protein or healthy fats to tamp down on the glycemic impact,” says Scott Keatley, RD .
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Watch your portions: A serving size is about ½ cup or one small potato. This is where people often go wrong.
As one registered dietitian wisely noted, “The majority of Americans aren’t eating enough vegetables in the first place, so it’s more important, from my perspective, to encourage people to just eat the damn vegetables” .
Claim #3: Sweet Potatoes Are Risky for People with Kidney Stones
The Truth: This is one of the few legitimate concerns, but it only applies to a specific group of people.
Sweet potatoes are high in oxalates, a natural compound that can contribute to the formation of calcium oxalate kidney stones .
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Who needs to be careful: If you have a history of calcium oxalate kidney stones, you may need to limit high-oxalate foods like sweet potatoes, spinach, beets, and nuts .
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A crucial caveat: If you eat or drink calcium-rich foods at the same time (like pairing your sweet potato with cheese or yogurt), the calcium can bind to the oxalate in your stomach before it reaches your kidneys. This actually helps your body handle oxalate without turning it into a stone .
If you don’t have a history of kidney stones, this is not a concern for you.
Claim #4: You Can Overdose on Vitamin A from Sweet Potatoes
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