Can weight loss slow prostate cancer?

Many men diagnosed with low-grade prostate cancer follow active surveillance, in which they regularly follow up with a doctor for routine PSA tests, prostate biopsies, and possibly MRI scans. If there is evidence their cancer has progressed, then they can consider treatment (radiation or surgery). While there is little men can do to slow the growth of known low-grade prostate cancer, losing excess weight and keeping it off may help keep undetected high- or medium-grade cancer from becoming more aggressive.