Sweet potatoes are renowned for their numerous health benefits, including being rich in vitamins, minerals, and dietary fiber. However, there are specific instances when their consumption may not be advisable:

1. Individuals Prone to Kidney Stones: Sweet potatoes contain oxalates, compounds that can contribute to the formation of kidney stones in susceptible individuals. Consuming them in excess may exacerbate this risk.

2. Those with Digestive Sensitivities: Sweet potatoes are high in fiber and contain mannitol, a type of sugar alcohol. While beneficial for many, excessive intake can lead to gastrointestinal discomfort, including gas, bloating, and diarrhea, particularly in individuals with sensitive digestive systems.

It's important to note that these concerns are generally associated with excessive consumption. For most people, sweet potatoes can be a nutritious and healthful component of a balanced diet.