This is interesting research to support introducing solid food to babies while maintaining breast-feeding. In summary:
• Don’t give babies solid food before 4 months as their gut is too immature and make promote allergic disease
• Giving solid foods at the same time as breastfeeding can benefit the immune system
• Introducing solid foods at 17 weeks is recommended
Article about the report in MTB Europe, January 2014: www.mtbeurope.info/news/2014/1401012.htm?goback=.gde_2308956_member_5829671259381723140#!
They have a website about early nutrition, long term effects of early nutrition on later health: www.project-earlynutrition.eu/html/en/public/news.html