22 Nov 2018 --- Mannose sugar, a widely available nutritional supplement, can both slow tumor growth and enhance the effects of chemotherapy in mice with multiple types of cancer, a study published in Nature has found. The study sheds light on how mannose could be used to help treat cancer by interfering with glucose and reducing how much sugar cancer cells can use. Although the findings are promising, the researchers note patients should not be self-prescribing mannose and further studies are required.