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Originally Posted by Matthew Shea  Regarding the toxins stored with the fat, I haven't heard that before. It sounds possible, though, but I very much doubt that such toxins would be released in any significant quantity at any given time. |
Except during rapid weight loss, such as fasting. Hence as one's body becomes cleaner fasting gets easier. Fat sequesters toxins to take them out of general circulation in the body. Fasting/weight loss reintroduces them into circulation to be removed from the body for good.
As for water, it makes up 70-75% of muscles, and only 10% of fat.
Sports Nutrition: Fuel Movement & Sport
Regarding number of fat cells, "when fat cells have expanded to their maximum size, they can divide, thus producing an increase in the actual number of fat cells". "People with extra fat cells may be able to shrink these cells and get great results, but since their fat cells don't just disappear, they tend to regain lost weight rapidly if they're not careful. Those "insidious little sponges" are just waiting to be fed, so it takes some real commitment and care to keep the weight off permanently."
Fat Cells: Is the Amount You Have Predetermined?