Yellow is the color of health – at least in many compounds that seem to have beneficial effects in health and lifespan. Here, curcumin – the yellow ingredient in the spice turmeric, is added to plates of C. elegans nematodes as part of the Caenorhabditis Intervention Testing Project (CITP) in the Lithgow lab. We compare the lifespans of worms on these plates to those of worms on plates with no added compounds, and see if there’s a statistical difference in how long they live.