Individual Factors That Affect Metabolism
There are lots of variations in rate of energy expenditure for all individuals.
Body composition
Having higher a percentage of lean body weight creates a faster metabolic rate
Very low calorie diets
Eating behavior can alter your metabolic rate in adverse ways when you don't fuel your body sufficiently
Lifestyle habits
A sedentary lifestyle leads to fewer calories burned
Caffeine
Caffeine is believed to raise your metabolic rate
Hypothyroidism
An underactive thyroid gland slows your metabolic rate
Age
As we age, our lean body mass declines and we burn fewer calories. We also require fewer calories to sustain life
Brown fat
If you are fortunate enough to be genetically blessed with a high percentage of brown fat then you likely burn calories at a faster rate. This is not something that can be changes through lifestyle
Food allergies
Food allergies can lead to both weight loss and gain
Food processing
Digesting, absorbing, transporting and storing the food consumed also take calories
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