Matt Damon says he changes his diet to get in shape for *The Odyssey*, reporting that removing one food leads to significant weight loss. The outlets describe Damon as cutting about 15 kg (or roughly 2.5 stone), presenting the change as a major factor in how he looks for the role.

Both reports frame the adjustment in practical terms rather than medical ones, tying his results to a goal of looking “lean but strong.” They differ mainly in how they characterize the diet swap: one outlet emphasizes that the change “changed” his life, while the other focuses on the specific weight loss figure and the target physical look for filming. Neither account provides detailed nutritional breakdowns beyond the claim that one food is eliminated.

Overall, the sources agree that Damon’s preparation for the project includes a targeted dietary elimination that results in measurable weight reduction.