The researchers in Dundee, Scotland are following a large cohort. The first study showed reduced infection (particularly gastro-intestinal), following up at 2 years. Howie et al, BMJ 1990. Next was published in BMJ 1998 - showed benefits of breastfeeding and delaying solids till 16 weeks (yes, that's delaying in Dundee terms< and also is the 'official' recommendation in UK). If I remember correctly, they found reduced wheeze, less body fat, and lower blood pressure. I believe the children are now in their teens - and they are looking at cholesterol and glucose tolerance. No doubt they will publish in due course. The study was well constructed (IMHO) and controls for confounding factors. Mary Broadfoot, Paisley, Scotland [log in to unmask] The Breastfeeding Network - Independent Support and Information about Breastfeeding http://webzone1.co.uk/www/cathus/bfnindex.htm