Abstract
Many studies conducted in recent years have shown that the incidence of cancer is still on the rise. According to the World Health Orgnization (WHO), most of these cases are a consequence of poor diet and lifestyle. Excess dietary carbohydrates, low-glycaemic index carbohydrates in particular, and low intake of fibre promote carcinogenesis. Many studies led to a conclusion that high body mass index (BMI) and waist to hip ratio (WHR) contribute to the risk of cancer. High blood glucose levels are one of the main factors predisposing to cancer. High postprandial blood glucose, which is most commonly observed in patients with type 2 diabetes, is also one of the factors that disturb metabolic transformations, which may promote carcinogenesis. It is worth following the principles of rational nutrition as part of cancer prevention. Manufacturers meet consumers' demands by developing improved food products, such as jams made from vegetables, which are higher in fibre and lower in sugar compared to fruit jams.
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