Here's something encouraging - Description of diet of South American Indians, which may be different than that of European ancestral diet: http://www.sciencedaily.com/releases/2012/05/120521163621.htm#.T9CnockVR5s.email<http://www.sciencedaily.com/releases/2012/05/120521163621.htm#.T9CnockVR5s.email>