The Priority Food Tree and Crop Food Composition Database contains nutritional information of selected tree foods and crops, with geographical focus on sub-Saharan Africa. The current version (version 1) comprises 132 foods (out of 99 species) and 30 components. All component values are presented per 100 g edible portion on fresh weight basis (EP). In addition to actual food composition values, the database includes scores for all foods – “high source”, “source”, “present, but low source”, or “not a source” – of the selected micronutrients iron, vitamin A, folate and vitamin C. Searches can be done by food name, scientific name and by food group.
Pretty clear, no? Well, if not, there’s now a user guide.
Search the database here. And rank all the foods by their contents of iron, folate, vitamin A or vitamin C here.
But before you ask, no, there’s no variety-level information. Mango is mango, maize is maize. For that you have to go to other databases.