If you are concerned about unplanned weight loss please speak with your health care professionals who will be able to screen you for Malnutrition using a screening tool such as https://www.bapen.org.uk/screening-and-must/must/must-toolkit/the-must-itself This tool assesses individuals as being at low, medium or high risk of malnutrition.
You can also screen yourself https://www.malnutritionselfscreening.org/self-screening.html
If you are medium or high risk of malnutrition some simple changes to what you eat and drink can help you to improve your intake of nutrients such as energy/calories, protein, and vitamins. The leaflets below will support you with some practical suggestions on how to make these changes.
For information how to increase your calorie and protein content of your diet if you have diabetes