"Like the rainforest, the healthy human microbiome is a balanced ecosystem. The correct balance of microbes serves to keep potential pathogens in check and regulate the immune system. Microbes also perform essential functions such as digesting food and synthesising vitamins. Some research also suggests that microbial activity influences mammalian mood and behaviour. Studies have linked microbiome imbalance to autism, depression, and anxiety, as well as many gut disorders, eczema, and chronic sinusitis. Infant health even appears to benefit from a proper seeding of microbes at birth, with health consequences ranging into adolescence. "
Crowdsourcing human microbiome research – Oxbridge Biotech