Australian actress Nathalie Kelley has sparked controversy after promoting a supplement made from sterilised human waste as a solution for gut health issues. In a recent social media video, Kelley described her struggles with digestive health and claimed that the product, Thaena, helped her become regular after other remedies failed. She likened the supplement to faecal transplants, suggesting it could revolutionise gut health by restoring depleted microbiomes. Kelley, known for her outspoken views and activism, has also made headlines for her personal life and advocacy work in recent years.