Obesity has become a global epidemic among all age groups. A number of countries
have even experienced a notable shift from under- to over nutrition in youngsters
or a double burden of both malnutrition and obesity. The World Health Organization
(WHO) defines overweight and obesity as “abnormal or excessive fat accumulation that
may impair health”. Worldwide, the impairment of health includes a number of diseases
related to obesity causing death in at least 2.6 million people each year. The prevalence
of childhood overweight and obesity is alarming and increasing at a faster rate
than before. Globally, in 2005 approximately 1.6 billion individuals of the world population
aged 15 years and older were overweight and at least 400 million adults were
obese. By 2015, the WHO expects approximately 2.3 billion adults to be overweight and
more than 700 million to be obese. By 2030, the global burden of obesity is projected to
be a total of 3.3 billion obese adults.
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