Did you know that you and I are only 1% human — we've 90 trillion cells which don't belong to us. Yes we are more bacteria than human. Have you ever wondered what it means to be human? It turns out that only a tiny percentage of what you and I are made of is actually human — and we need our non-human bits to survive. This part of us now has a name — it's called our microbiome. But we're doing dreadful things to this hidden majority and it's damaging our health as a result. From the Tonic series produced with the assistance of NPS. For more information visit: http://www.nps.org.au