The most common approach to the treatment of weight loss among older adults is consumption of high-energy/high-protein oral supplements between meals as a means of increasing daily energy intake. The role for pharmacotherapy remains limited at present....Avoid junk foods,add extra calories to your diet,have 4 to 5 meals rather than large 3,avoid excess of carbohydrates since you are diabetic...add protein rich foods and healthy fats to diet for e.g..egg white...add fibre rich foods like green leafy veggies,carrots,Apple, etc. Add green tea to your diet .you have to eat more foods high in amino acids,calcium, zinc, iron, copper and magnesium...do regular exercise without failure......consult dietitian for further details...for lethargy and fatigue fallow bellow advices
1. Discard or minimize stress factors as much as possible.
2. Eat properly and limit carbs in your diet .
3. Supplement with magnesium citrate powder and malic acid.
By doing so, you will strengthen your blood sugar handling system, avoid or overcome fatigue symptoms and lethargy, reduce your risk for numerous health problems and bring about healthy adrenal glands...consult physician for further help
For weight control eat in time at regular intervals.Have lots of vegetable salads,and a fruit daily.Less carbohydrate,high protein,less fat and high fibre diet should be followed.Have 2-3 almonds or walnuts.For your lethargy and weakness check your Vit D3. If it is low take supplements which will solve most most of your problems.
Also check your thyroid profile.
Wish you a healthy living