Technology has changed human life drastically in many ways, and that's a good thing because it making human life easier & increasing the quality of life but One more thing that has changed with adaption of technology is Eating habits. Specially eating habits of young people and which ultimately affecting their health. Their are lots of people who face many health problem and majority of them facing one common problem is begin underweight, And they know that culprit of their situation is their eating habits which lead them to being underweight and not able to gain weight. To function normally human body need some nutrition, protein & some good fat here in this article How to gain weight fast and naturally - Best and proven ways we have shared reasons of being underweight, tips to gain weight.