What Puts Fat Into Fat Cells, and What Takes it Out?
Monday, June 25, 2012
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Body fatness at its most basic level is determined by the rate of fat going into vs. out of fat cells. This in/out cycle occurs regardless of conditions outside the cell, but the balance between in and out is influenced by a variety of external factors. One of the arguments that has been made in the popular media about obesity goes something like this:
A number of factors can promote the release of fat from fat cells, including:
Can you spot the logical error in this argument?
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A number of factors can promote the release of fat from fat cells, including:
Epinephrine, norepinephrine, adrenocorticotropic hormone (ACTH), glucagon, thyroid-stimulating hormone, melanocyte-stimulating hormone, vasopressin, and growth hormoneBut only two promote fat storage:
Insulin, and acylation-stimulating protein (ASP)*Therefore if we want to understand body fat accumulation, we should focus on the latter category, because that's what puts fat inside fat cells. Simple, right?
Can you spot the logical error in this argument?
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