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Like many other medical conditions, obesity is the result of an interplay between environmental and genetic factors. [2] [3] Studies have identified variants in several genes that may contribute to weight gain and body fat distribution; although, only in a few cases are genes the primary cause of obesity. [4] [5]
Weight gain is an increase in body weight. This can involve an increase in muscle mass , fat deposits , excess fluids such as water or other factors. Weight gain can be a symptom of a serious medical condition.
Childhood obesity is often the result of an interplay between many genetic and environmental factors. Polymorphisms in various genes controlling appetite and metabolism predispose individuals to obesity when sufficient calories are present. Over 200 genes affect weight by determining activity level, food preferences, body type, and metabolism. [36]
A lesser-known fact about weight loss is that your body’s needs and metabolism change after losing weight, according to research.To put it into context, a 110-pound person requires much fewer ...
About 40% of American adults are living with obesity — and for many, it can feel a bit like a roller-coaster as their weight fluctuates. Experts explain the science behind "yo-yo dieting."
“There are many medications that may cause weight gain,” says W. Scott Butsch, M.D., director of obesity medicine in the Bariatric and Metabolic Institute at the Cleveland Clinic.
On average obese people have a greater energy expenditure than normal weight or thin people and actually have higher basal metabolic rates. [45] [46] This is because it takes more energy to maintain an increased body mass. [47] Obese people also underreport how much food they consume compared to those of normal weight. [48]
Both doctors say that the root cause of menopause symptoms, including weight gain, is caused by a sudden drop in production of estrogen and progesterone, so these are two hormones it can be ...