You have given a nice overview of  beneficial qualities os grapes and I'd like to add a fly in the ointment:) Grapes shouldn't be given to children because the last can swallow them that can lead to unfavourable consequences. Also some recommend to peel the fruit 'cause their peel can accumulate pesticides (or at least to wash them thoroughly).  Yet they don't recommend to abuse grape when you have diabetes mellitus, acute gastric ulcer and any other acute conditions. However, the berries really have lots of benefits for our health. But without any addictions! ;)