There's more to grapes than meets the eye. Research has shown that chemicals – called procyanidin C dimers – found in high levels in grape-based food products block the formation of oestrogen. Oestrogen is a key factor in breast cancer tumour development.
Eat a small bunch of grapes (about the size of a tennis ball) every day when they are in season. In winter, a daily glass of red wine should do the trick. Bear in mind that grapes have a high sugar content and should therefore be eaten in moderation.