Skinny people tend to have weaker immune systems, making them more susceptible to infections and diseases that your recovery is complicated and slower. 
It is therefore so essential to know the causes of this weakness and how to gain naturally.
The composition of teeth, hair, skin, and nails is also detrimental. Even an excess of physical activity, lack of appetite and stress are factors to lose weight without trying.
However, you must do so through the foods rich in fat and calories or junk foods.
For a healthy weight gain, we present a list of some foods (mainly of vegetable), recommended for this purpose, also in addition to many stimulate appetite.
- Brewer’s yeast.
- Sunflower seeds, sesame, flax or pumpkin.
- Olive oil or canola oil.
- Flour chickpeas, corn, lentils etc.
- Avocado and olives.
- Dried fruit such as raisins and fruits in syrup.
- Nuts such as almonds, walnuts, hazelnuts etc.
- Honey.
- Fruit juices and milkshakes.
- Bread added with seeds, grains, and nuts such as oats, wheat germ etc.
Remember that these type of foods should be monitored by a nutritionist, to establish a plan that really fits your needs.