Why am I losing weight?
Cancer and its treatment can change the way you eat, how well your body absorbs nutrients from food, and the way your body uses the nutrients. Eating and drinking less than usual is very common when you have cancer, but it means the body may not get the energy, protein and other nutrients it needs. This can mean you lose weight without meaning to (unintentional weight loss). Unintentional weight loss is common in patients with cancer but may vary depending on the type of cancer you have.
Any of the symptoms above can impact on your food intake, for example how much food you are able to eat or even the kinds of foods you will be able to manage. In addition, fear, stress or anxiety experienced upon receiving a cancer diagnosis or at any stage of your cancer journey may also impact on your appetite. For some, mealtimes may become less enjoyable and you may find that you have gone off foods that you previously enjoyed.
Some of the common symptoms or side effects experienced by people living with cancer may include:
The disease itself places huge nutritional demands on the body and as a result, many people experience unintentional, cancer-related weight loss during their cancer journey. It’s important to maintain your weight during this time, even if you are overweight at the start of your cancer journey. Even small amounts of unintentional weight loss can lead to loss of muscle stores, which in turn can have a negative impact on strength, independence and other outcomes.
Cancer treatments can also be very demanding on the body. In many cases, people being treated for cancer will need more calories and protein than normal.
While the prevention and management of undernutrition is central to nutritional care, the goals of nutritional management for each person living with cancer will depend on the stage at which they are at in their cancer journey. For some, the goal may be to support treatment tolerance and reduce adverse effects of treatment, while for others comfort and enjoyment of eating may be the priority.
Always speak to your healthcare professional (doctor or dietitian or nurse) before making any changes to your diet. The information contained in this website should not replace information you have received from your healthcare professional.