The life expectancy of the Brazilian population increased from 71.16 years in 1998 to 76.2 years in 2016, according to the Brazilian Institute of Geography and Statistics (IBGE). The data indicate a significant progress compared with 55.50 years in 1940. According to the IBGE, Brazil will need some time to catch up with Japan, Hong Kong (China), Switzerland, Iceland, Australia, France and Italy, where the average life expectancy is already over 81. Research has shown that Brazil would achieve that level by 2030.

Demographic projections foresee the continuation of this process, estimating a life expectancy in Brazil around 77.4 years in 2020. The decline in mortality at young ages and the increase in longevity, combined with the decline of fecundity and the accentuated increase of degenerative chronic diseases, caused a rapid process of demographic and epidemiologic transition, imposing a new public health agenda in the face of the complexity of the new morbidity pattern.

Obesity in Brazil is a growing health concern. 52.6 percent of men and 44.7 percent of women in Brazil are overweight. 15% of Brazilians are obese. The Brazilian government has issued nutrition guidelines which have caught the attention of public health experts for their simplicity and their critical position towards the food industry. The guidelines are summarized at the end of the document as follows:

1. Prepare meals using fresh and staple foods.

2. Use oils, fats, sugar, and salt only in moderation.

3. Limit consumption of ready-to-eat food and drink products.

4. Eat at regular mealtimes and pay attention to your food instead of multitasking. Find a comfortable place to eat. Avoid all-you-can-eat buffets and noisy, stressful environments.

5. Eat with others whenever possible.

6. Buy food in shops and markets that offer a variety of fresh foods. Avoid those that sell mainly ready-to-eat products.

7. Develop, practise, share, and enjoy your skills in food preparation and cooking.

8. Decide as a family to share cooking responsibilities and dedicate enough time for health-supporting meals.

9. When you dine out, choose restaurants that serve freshly made dishes. Avoid fast-food chains.

10. Be critical of food-industry advertising.

Several studies have shown that obese men tend to have a lower sperm count, fewer rapidly mobile sperm and fewer progressively motile sperm compared to normal-weight men.

Obesity in Germany has created a cholesterol problem. High cholesterol is known to cause premature death, angina, heart disease and strokes.

There has been an increase of children with Type 1 diabetes between 1996 and 2011. Diabetics are at higher risk for complications such as heart attack and stroke. In Germany, 600,000 people suffered from diabetes near the end of World War II compared to eight million now.

Obesity can increased risk for secondary diseases such as diabetes, cardiovascular disease, certain cancers and Alzheimer's. Children who get diabetes can expect to lose 10 to 15 years off of their lives. Diabetes also affect the eyes, kidneys and nerves in the legs.

Obesity is a "very strong promoter of cancer." Obesity causes an increased risk for colon cancer and breast cancer.

Genes partly play a role in obesity. Scientists at the German Institute of Human Nutrition and the University Hospital of Leipzig stated that identified two genes that promote fat accumulation in the abdominal cavity. The increased activity of the genes also promotes the release of an enzyme that is responsible for the formation of cortisol. A permanent increase in cortisol levels contribute to obesity.

Several studies have shown that obese men tend to have a lower sperm count, fewer rapidly mobile sperm and fewer progressively motile sperm compared to normal-weight men.

Obesity rates in Italian two-year-olds are the highest in Europe with a rate of 42%. Causes are lack of a Mediterranean diet and lifestyle choices such as exercise and getting enough sleep.

Obesity in China is a major health concern according to the WHO, with overall rates of obesity below 5% in the country, but greater than 20% in some cities. This is a dramatic change from times when China experienced famine as a result from ineffective agriculturalization plans such as the Great Leap Forward.

Currently, obesity in China is mostly confined to the cities where fast food culture and globalization have taken over, in comparison to poorer rural areas. Despite this concentration of obesity, the sheer size of China's population means that over one fifth of all one billion obese people in the world come from China.

A lack of exercise is a cause of obesity. A study showed that children only got 30 minutes of exercise instead of the hour that is required. Proper skeletal development, muscle building, heart and circulation are among the benefits of exercising during childhood.

The causes of childhood obesity can be based on both a combination of individual choices and socio-environmental adaptions with genetic factors playing an important role also.

Information from the Argentina's Ministry of Health shows the following progression recorded since 2005 when was launched the National Survey for Risk Factors, : "Encuesta Nacional de Factores de Riesgo" (ENFR)

Source

- 2005 = 14.6%

- 2009 = 18%

- 2013 = 20.8%

- 2005-2013 period variation = 42,5%

6 out of 10 registered as overweight and 2 out of 10 as obese.

The data of the survey was gathered by 1,000 surveyors who interviewed 32,365 adults older than 18 years in cities larger than 5,000 inhabitants around the nation. The 70.7% (32.365) of the people that were asked to take survey did accept to be interviewed. ganso

The medical condition of being overweight or obesity is defined as "abnormal or excessive fat accumulation that may impair health". It is measured through the Body Mass Index (BMI), defined as a person's weight, in kilograms, divided by the square of the person's height, in meters. If an individual has a BMI of 25–29, he or she is overweight. Having a BMI of 30 or more means an individual is obese. The greater the BMI, the greater the risk of chronic diseases as a result of obesity. These diseases include cardiovascular diseases, diabetes, musculoskeletal disorders, cancer, and premature death.

Obesity in Argentina is a growing health concern with health officials stating that it is one of the leading causes of preventable deaths in the Argentina. According to FAO/UNO, the prevalence of obesity among adults in Argentina was of 29.4% in 2008.

Several studies have shown that obese men tend to have a lower sperm count, fewer rapidly mobile sperm and fewer progressively motile sperm compared to normal-weight men.

Obesity is a chronic health problem. It is one of the biggest factors for a type II diabetes, and cardiovascular disease. It is also associated with cancer (e.g. colorectal cancer), osteoarthritis, liver disease, sleep apnea, depression and other medical conditions that affect mortality and morbidity.

According to the NHANES data, African American and Mexican American adolescents between 12 and 19 years old are more likely to be overweight than non-Hispanic White adolescents. The prevalence is 21%, 23% and 14% respectively. Also, in a national survey of American Indian children 5–18 years old, 39 percent were found to be overweight or at risk for being overweight. As per national survey data, these trends indicate that by 2030, 86.3% of adults will be overweight or obese and 51.1% obese.

A 2007 study found that receiving Food Stamps long term (24 months) was associated with a 50% increased obesity rate among female adults.

Looking at the long-term consequences, overweight adolescents have a 70 percent chance of becoming overweight or obese adults, which increases to 80 percent if one or more parent is overweight or obese. In 2000, the total cost of obesity for children and adults in the United States was estimated to be US$117 billion (US$61 billion in direct medical costs). Given existing trends, this amount is projected to range from US$860.7-956.9 billion in healthcare costs by 2030.

Food consumption has increased with time. For example, annual per capita consumption of cheese was in 1909; in 2000; the average person consumed of carbohydrates daily in 1970; in 2000; of fats and oils in 1909; in 2000. In 1977, 18% of an average person's food was consumed outside the home; in 1996, this had risen to 32%.

Genetics, according to the Australian Health Survey plays a primary role in determining obesity. In 2011/2012 it was recorded that 90% of the Australian population had inherited their obese tendencies due to the epigenetic modifications of their mothers during pregnancy. Interchanging closely with the genetic factor, the environment and individual temptations are also highlighted as contributing causes to the worldwide epidemic. The genetic configuration influences the tendencies to become overweight, and diet and physical activity determines to what extent those tendencies are elaborated.

According to Cleveland Clinic, cultural, social, and environmental factors, among others, all affect eating behaviors.

The MONICA Project, sponsored by the World Health Organization, discovered that 30% of the population in the Arab World is overweight or obese, including adolescents and adults. This percentage is smaller for North African countries than oil-producing countries, but is still a prevalent trend. The spread of the Western lifestyle, defined as "the intake of attractive energy dense food with undesirable composition, increased consumption of animal fats and sugars and reduced consumption of dietary fiber, along with a lack of sufficient physical activity", is one of the leading causes. Specifically in the Arabian Peninsula, "physical activity of the population has significantly diminished with the availability of housemaids, private cars, television, and sophisticated household appliances. In addition, the types of food and fat intake have changed...".

Other common factors, besides a sedentary lifestyle and unhealthy food choices, across the Arab world include urbanization, technology, and a cultural appreciation of female plumpness and the practice of "leblouh" ("fattening").

There is most likely a link between children's linear growth and household sanitation practices. The ingestion of high quantities of fecal bacteria by young children through putting soiled fingers or household items in the mouth leads to intestinal infections. This affect children's nutritional status by diminishing appetite, reducing nutrient absorption, and increasing nutrient losses.

The diseases recurrent diarrhoea and intestinal worm infections (helminthiasis) which are both linked to poor sanitation have been shown to contribute to child stunting. The evidence that a condition called environmental enteropathy also stunts children is not conclusively available yet, although the link is plausible and several studies are underway on this topic. Environmental enteropathy is a syndrome causing changes in the small intestine of persons and can be brought on due to lacking basic sanitary facilities and being exposed to faecal contamination on a long-term basis.

Research on a global level has found that the proportion of stunting that could be attributed to five or more episodes of diarrhoea before two years of age was 25%. Since diarrhoea is closely linked with water, sanitation and hygiene (WASH), this is a good indicator for the connection between WASH and stunted growth. To what extent improvements in drinking water safety, toilet use and good handwashing practices contribute to reduce stunting depends on the how bad these practices were prior to interventions.

Poor maternal nutrition during pregnancy and breastfeeding can lead to stunted growth of their children. Women who are underweight or anemic during pregnancy, are more likely to have stunted children which perpetuates the inter-generational transmission of stunting.

Obesity in the United Kingdom is a significant contemporary health concern, with officials stating that it is one of the leading preventable causes of death. In February 2016, Health Secretary Jeremy Hunt described rising rates of childhood obesity as a "national emergency".

Data published as a part of the World Health Organisation (WHO) study in 2014 indicated that 28.1% of adults in the United Kingdom were recognised as clinically obese with a Body Mass Index (BMI) greater than 30. In 2014 62% of adults in England were classified as overweight (a body mass index of 25 or above) or obese, compared to 53% 20 years earlier. More than two-thirds of men and almost six in 10 women are overweight or obese.

Experts have predicted that by the year 2020 one third of the United Kingdom population could be obese. Rising levels of obesity are a major challenge to public health. There are expected to be 11 million more obese adults in the UK by 2030, accruing up to 668,000 additional cases of diabetes mellitus, 461,000 cases of heart disease and stroke, 130,000 cases of cancer, with associated medical costs set to increase by £1.9–2.0B per year by 2030. Adult obesity rates have almost quadrupled in the last 25 years.

For children, data from the Health Survey for England (HSE) conducted in 2014 and examining patterns of overweight and obesity among children aged 2–15, showed that 17% of children were obese and an additional 14% of children were overweight.

Combing three years of data (2012, 2013 and 2014) Public Health England identified Barnsley, South Yorkshire as the local authority with the highest incidence of adult obesity (BMI greater than 30) with 35.1%. Data from the same study revealed that Doncaster, South Yorkshire was the local authority with the highest overall excess weight with 74.8% of adults (16 years and over) with a BMI greater than 25. In previous Public Health England studies based on 2012 data, Tamworth in Staffordshire had been identified as the fattest town in England with a 30.7% obesity rate.

Obesity in Saudi Arabia is a growing health concern with health officials stating that it is one of the leading causes of preventable deaths in Saudi Arabia. According to "Forbes", Saudi Arabia ranks 29 on a 2007 list of the fattest countries with a percentage of 68.3% of its citizens being overweight (BMI>25). Compounding the problem, according to a presentation at the 3rd International Obesity Conference in February 2014, is that obesity-related surgeries are not covered under Saudi healthcare.

Causes cited for the growing rates of obesity in the United Kingdom are multiple and the degree of influence of any one factor is often a source of debate. At an individual level, a combination of excessive food energy intake and a lack of physical activity is thought to explain most cases of obesity. Reduced levels of physical activity due to increased use of private cars, desk bound employment, a decline in home cooking skills and the ready availability of processed foods high in sugar, salt and saturated fats, are variously cited as contributing factors.

According to Forbes, Greece ranks 16 on a 2007 list of fattiest countries with a percentage of 65.5% of its citizens with an unhealthy weight. This may be a surprise to most individuals because in the past Mediterranean countries like Greece were known to live a pretty healthy lifestyle. The Mediterranean diet was developed based on the food patterns in these different countries, Greece being a main one. In the past the people of Greece consumed a diet consisting mainly of fish, fruit, vegetable, and wine, limiting meats. These countries also were fairly active which helps to keep them healthy.

Today’s European countries are moving away from this Mediterranean lifestyle and towards a more Western way of life. Indulging on the fast foods and limited daily activity are to blame on for this increase in obesity in Greece . An article from the Associated Press states that obesity rates in some European countries are higher than that of the United States.

Greece’s growing health concerns related to obesity are becoming an issue that was not evident in the past because of an increase in consumption of high fat, high calorie, fast foods and decreased levels of activity. Obesity brings on health concerns such as diabetes and cardiovascular disease. Greece is adopting a western style of eating and straying away from the active lifestyles they once possessed.

Obesity in Pakistan is a health issue that has attracted concern only in the past few years. Urbanisation and an unhealthy, energy-dense diet (the high presence of oil and fats in Pakistani cooking), as well as changing lifestyles, are among the root causes contributing to obesity in the country. According to a list of the world's "fattest countries" published on "Forbes", Pakistan is ranked 165 (out of 194 countries) in terms of its overweight population, with 22.2% of individuals over the age of 15 crossing the threshold of obesity. This ratio roughly corresponds with other studies, which state one-in-four Pakistani adults as being overweight.

Research indicates that people living in large cities in Pakistan are more exposed to the risks of obesity as compared to those in the rural countryside. Women also naturally have higher rates of obesity as compared to men. Pakistan also has the highest percentage of people with diabetes in South Asia.

According to one study, "fat" is more dangerous for South Asians than for Caucasians because the fat tends to cling to organs like the liver instead of the skin.

According to 2007 statistics from the World Health Organization (WHO), Australia has the third-highest prevalence of overweight adults in the English-speaking world.Obesity in Australia is an "epidemic" with "increasing frequency." "The Medical Journal of Australia" found that obesity in Australia more than doubled in the two decades preceding 2003, and the unprecedented rise in obesity has been compared to the same health crisis in America. The rise in obesity has been attributed to poor eating habits in the country closely related to the availability of fast food since the 1970s, sedentary lifestyles and a decrease in the labour workforce.