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Many studies have sought evidence for gluttony or sloth in those prone to weight gain, and the obesity epidemic is also widely attributed to secular trends in population energy intake or physical activity level (Briefel and Johnson, 2004; Dollman et al., 2005). In popular wisdom, obesity is the product of too much food and too little activity, seemingly implicating personal responsibility.
One is the fact that Americans are consuming more meat today than they did two to three decades–ago and most animal products harbor antibiotics, steroids, and hormones. Another reason is the popularity of artificial sweeteners, which can make you fat. Yet a third reason is the love affair with consuming refined, processed foods, which have ...
Sep 27, 2022 · Humans are now living longer than ever, with average life expectancy across the globe shooting up from about 30 years old or so during the 20th century to about 70 years in 2012, according to the ...
Sep 13, 2023 · These changes caused the incidence of obesity to slowly increase over the early– to mid–20th century, the team says, even as BMIs on the lower end of the spectrum remained consistent. By pushing back the advent of the epidemic, the findings undermine some existing assumptions about its origins, such as the influential role of processed foods or inactivity, Sørensen says.
- Genes
- Epigenetics
- Microbiome
Genetic variation between people accounts for 50 to 70% of variation in BMI, but the genetics are complex. Amount ofbody fat is affected by many different factors, including how efficiently the digestive system extracts nutrients fromfood, how readily nutrients are stored as fat or burned as fuel, and how hungry we feel. Each of these factors isinf...
When a baby is conceived, the sequence of their genes is set for life. However, the activity of those genes is flexible.Signals from the environment influence our genes, guiding them down different developmental pathways. Some of thosedevelopmental decisions influence how easily people put on fat later in life. Either too little or too much nutriti...
A person’s intestines contain two to three pounds of microorganisms, most of which are bacteria. These bacteria help usget more energy from food by breaking down nutrients that we can’t digest on our own. They can have other effects too,such as protecting the intestinal lining or stimulating the production of appetite-controlling hormones. Differen...
Sep 30, 2015 · Why It Was Easier to Be Skinny in the 1980s. A new study finds that people today who eat and exercise the same amount as people 20 years ago are still fatter. There’s a meme aimed at Millennial ...
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Mar 2, 2022 · For many decades, excessive body weight has been considered rather a symbol of health. It was a marker of wealth and prosperity, as well as a sign of high social status. The centuries that passed on the development of science and medicine have gradually changed its face, but significant progress in understanding the causes and consequences of obesity has been made in the last 30 years.
