50 years mom almost skinny.all blood tests are fine.i heard that ensure milk good for gaining weight.is that right?how long it takes to gain weight?

Many ways to gain we: Ensure is a dietary supplement. It is good source of calories. But there are many simple, more natural foods which can achieve this goal. All airy products(milk, yogurt, ice cream and milk shakes) are great source of extra calories. So is meat, eggs and nuts. Add an extra bed time snack to her 3 meals a day schedule which will help also.