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If water expands when frozen

But oils shrink when frozen

Then why would peanut butter expand when frozen?

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@BowsacNoodle

Is this related to why 3500 Calories result in gaining or losing a pound of fat because of fat that is chemically bound to water making Calories lower than what you would get at 1 pound divided by 9 Calories per gram if you convert weight to mass and vice versa

@shortstories Not sure I understand the question. The 3500 kcal thing per pound of fat is probably accounting for waste energy in ATP metabolism (comes off as heat. See uncouplers for specific example)

@BowsacNoodle

I am wondering if maybe plants like humans also bind fat to water and if this results in fat expanding instead of shrinking when frozen

@shortstories Plants usually store energy bound in water as starch. In humans, glycogen is our “starch” and it’s very wet. This is why you lose “water weight” when you starve yoursel for a few days, as your body depletes glycogen first before going into fat reserves. Specific plants with fat likely have their own mechanism, but I know avocados are very fatty and wet.

@BowsacNoodle

Pure fat contains approximately 9 calories per gram, which translates to roughly 4,100 calories per pound. However, body fat tissue is significantly different from pure fat. Body fat consists of adipocytes (fat cells)...

Research indicates that body fat tissue is approximately 87% fat, with the remaining 13% composed of water, protein, and other substances. This composition means the actual caloric content of body fat is considerably less than pure fat.

foodten.com/nutrition/how-many

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