Key Points: • Supplements have been linked to at least six Australian organ transplants since 2011 • Manufacturers don't have to prove they work before they go on the market • Very little solid evidence that they work and some evidence they do more harm than good More than half of us take a supplement or other complementary medicine each year, and some experts say it could be up to 80 per cent of us. In 2014, the complementary medicines industry as a whole generated $3.5 billion in revenue, and profits are rising. Yet the reality is that most of us take supplements on trust. We often don't know what ingredients they contain, where they come from or whether they are even effective for our condition. Serial Jvcomm32 there. At worst, supplements can be dangerous. But for most, there's little reliable evidence they work for much at all — and they are not as closely regulated for safety and effectiveness as you might think.