My weight is 43 this is continuing for a long time now I am 27 years old but the weight is stable it neither increase nor decrease. I also tried protein supplements but that also doesn't work..... should I consult a doctor, if yes which doctor should I consult?

Ans: Using the BMI is considered a good measure of a person’s weight because it compares their weight to their height. If you are underweight, it will depend on whether you may have a genetic background or a medical illness that prevents you from putting on weight. You may have an ectomorph body type. There are interventions doctors can recommend to help a person gain weight. Dietary guidelines for weight gain include increasing the quantities of the food gradually , to eat more frequently, having more nutrient dense foods like inclusion of nuts, dry fruits, starchy vegetables like potatoes, sweet potatoes, carrots, etc. Add healthy unsaturated fats: olive/ coconut oil. Include protein sources in every meal like chicken/fish/egg whites or veg sources like low fat milk and its products, soya and pulses. Consult a registered dietician or nutrition consultant for dietary advise.