Nutrient deficiency is main cause of marasmus .It occurs in small children which can't ingest protein , carbohydrates and nutrient .

Causes of Marasmus Disease:
Protein deficiency is the primary cause of Marasmus disease. Here is how it leads to the development of Marasmus:

Insufficient protein intake:
- Marasmus is a form of severe malnutrition that results from a deficiency in overall calorie intake, including inadequate protein consumption.
- Protein is essential for the proper growth and repair of tissues in the body. When there is a lack of protein in the diet, it can lead to muscle wasting and a weakened immune system, which are characteristic symptoms of Marasmus.

Effects of protein deficiency:
- Protein deficiency can impair the body's ability to build and maintain muscle mass, leading to a condition known as muscle wasting.
- Inadequate protein intake can also affect the immune system, making individuals more susceptible to infections and illnesses.
- In the case of Marasmus, the body is unable to meet its energy requirements due to the lack of protein and other essential nutrients, resulting in severe weight loss and overall weakness.

Other causes:
- While protein deficiency is the primary cause of Marasmus, other factors such as inadequate intake of other essential nutrients like vitamins and minerals can contribute to the development of the disease.
- In some cases, underlying medical conditions or environmental factors may also play a role in the development of Marasmus.
In conclusion, Marasmus disease is primarily caused by protein deficiency, which leads to severe malnutrition and a range of detrimental effects on the body's growth and immune function. Proper nutrition and access to an adequate protein intake are essential in preventing and treating Marasmus.