Krona text input requires a tab-delimited file with first column being a count, and the rest representing the hierarchy, for example:

2 Fats Saturated fat
3 Fats Unsaturated fat Monounsaturated fat
3 Fats Unsaturated fat Polyunsaturated fat
13 Carbohydrates Sugars
4 Carbohydrates Dietary fiber
21 Carbohydrates
5 Protein
4

This can be input into the Krona tool as generic text format, and would yield this Krona plot.