Matt Damon says his physical transformation for Christopher Nolan’s “The Odyssey” involved months of training alongside a strict dietary change. Multiple outlets report that Damon eliminated gluten from his diet, which he says helped him slim down to about 167 pounds (76 kg) and reach his lightest weight in about a decade. Several stories describe the shift as part of a broader lifestyle adjustment that combined exercise and food changes throughout the filming period. Damon also links the transformation to health improvements and says the diet change reduced cravings for certain foods. Fox News and the New York Post additionally frame the gluten-free decision as tied to identifying a food sensitivity or hidden health issue during intense preparation and training. Daily Mail and other reports present Damon’s account as a complete lifestyle change, not only a temporary diet. Across the coverage, Damon characterizes the overall process as highly demanding physically during production, while still describing it as ultimately beneficial to his day-to-day health and well-being. He indicates he plans to keep the dietary approach for personal reasons.