Brussels sprouts are rich in many valuable nutrients. They are an excellent source of vitamin C and vitamin K. They are a very good source of numerous nutrients including folate, vitamin A, manganese, dietary fibre, potassium, vitamin B6 and thiamine (vitamin B1) and a good source of omega-3 fatty acids, iron, phosphorus, protein, magnesium, riboflavin (vitamin B2), vitamin E, copper and calcium. In addition to these nutrients, Brussels sprouts contain numerous disease-fighting phytochemicals including sulforaphane, indoles, glucosinolates, isothiocyanates, coumarins, dithiolthiones, and phenols.
It is very important not to overcook Brussels sprouts. Not only do they lose their nutritional value and taste but they will begin to emit the unpleasant sulphur smell associated with overcooked cruciferous vegetables. To help Brussels sprouts cook more quickly and evenly cut each sprout into quarters. Let them sit for at least 5 minutes to bring out the health-promoting qualities and then steam them for 5 minutes.