Malnutrition refers to the situation where there is an unbalanced diet in which some nutrients are in excess, lacking or wrong proportion. Simply put, we can categorise it to be under-nutrition and over-nutrition. Despite India's 50% increase in GDP since 1991, more than one third of the world's malnourished children live in India. The World Bank estimates that India is one of the highest ranking countries in the world for the number of children suffering from malnutrition.
Though most of the population is still living below the National Poverty Line, its economic growth indicates new opportunities and a movement towards increase in the prevalence of chronic diseases which is observed in at high rates in developed countries such as United States, Canada and Australia. The combination of people living in poverty and the recent economic growth of India has led to the co-emergence of two types of malnutrition: undernutrition and overnutrition, according to Wikipedia.
The term malnutrition is multifaceted. It encompasses both overnutrition, associated with overweight and obesity, and undernutrition, referring to multiple conditions including acute and chronic malnutrition and micronutrient deficiencies.
Chronic malnutrition results from insufficient intake or absorption of essential nutrients over a protracted period. Stunting (short stature for age), the most commonly used indicator of chronic malnutrition, is associated with developmental impairments and reduced economic potential later in life (Black and others 2008; Grantham-McGregor and others 2007).
Micronutrient deficiencies are a form of chronic malnutrition that can have marked impacts on health, development, and productivity over the lifespan. Because visible signs are not always present, micronutrient deficiencies are often referred to as hidden hunger (see Das and others 
Some of the major causes for malnutrition in India are economic inequality. Due to the low social status of some population groups, their diet often lacks in both quality and quantity. Women who suffer malnutrition are less likely to have healthy babies.