Scientists have learned to use common baker’s yeast (S. cerevisiae) as a biological factory to produce valuable medicines and compounds that naturally come from fungi and mushrooms. By transferring the genetic instructions for making these compounds into yeast cells and improving them with genetic engineering, researchers can now produce therapeutically important substances like cancer-fighting drugs and antibiotics in large quantities. This approach is more practical and cost-effective than trying to extract these rare compounds directly from their native fungal sources or using other production methods.