Please suggest what foodstuffs to eat and what to avoid for my mother aged about 84, so that she can lose or at least not gain weight and not become weak or guide due to dieting. Since about two months, she began dieting on her own to lose weight to avoid health problems of obesity (for example to avoid weight on knees). She began to do take mainly liquid diet (lemon juice, honey water, juices, milk in night) and many times skipped dinner and avoided rice and chapattis even during lunch but took only vegetables. She even stopped to take the vitamin d and vitamin b12 tablets because of perception of heaviness or because of preference to obtain dietary source of vitamin (but my question is how can she obtain vitamin from diet if she has drastically reduced food intake). All this she did without supervision of a dietician, maybe by watching videos on youtube. In two months, although she lost weight from 72 kg to about 66 kg, she also became weak probably due to deficiency of foodstuffs. I noticed her voice became weak and few days back, she fell on ground maybe because of weakness from dieting. Few days back, her blood pressure was okay. Her blood glucose, vitamin d and vitamin b12 were also okay. She has begun to take the vitamin b12 and d tablets few days back (after she had stopped for about two months of dieting). Her tsh was also okay. She is on 100 mcg eltroxin. She eats only vegetarian foodstuffs without onion and garlic. She has a habit to drink common tea. Almost every three hours during day, she drinks a small cup of tea. I prefer that she should overcome the habit of tea fully because tea can reduce absorption vitamins and increase weakness. Also common tea contains cocoa. Since few days she has got taste of de-caffeinated coffee, so hopefully she would overcome habit of common tea soon. She does deep breathing and physical stretching exercises and walking in morning indoors for about 30 minutes. Please suggest a diet for her so that she does not become weak or giddy but also safely reduce weight at the same time. Thank you in anticipation.