Derived from SQL Server Books Online IN (Transact-SQL)
http://msdn.microsoft.com/en-us/library/ms177682.aspx, example A has:
WHERE e.JobTitle IN ('Design Engineer', 'Tool Designer', 'Marketing Assistant');
You should format your string, something like:
WHERE [Food] NOT IN ('Apple, 'Berry', 'Cherry');
Rick Byham, Microsoft, SQL Server Books Online, Implies no warranty