undertaker610 wrote:Do fat adapted and ketosis (from what andrew said for the strips) go by hand?
Time to dispel a myth. "Fat adapted" isn't a light switch. It isn't an on or off thing. EVERYBODY burns body fat at some point during the day!
Your fat cells act like an energy buffer for your body. When food is in your small intestine, particles that are small enough pass through the intestinal wall directly into your bloodstream. That's why your urine will smell like coffee after you have a few cups: coffee is literally passing directly into your bloodstream within a few minutes after you drink it, and most of it gets filtered out by your kidneys into your urine shortly thereafter!
While you eat, your lean tissue and your fats gobble up nutrients from the bloodstream freely. One of the reasons we talk about "post-workout shakes" so much is that your muscle tissues gobble up more than their fair share for a short while after a workout, leaving less protein for the liver to convert into glucose.
Between meals, your fat cells
release fat into the bloodstream. Everybody's body does this, particularly
while they are asleep. Otherwise, you'd wake up in the middle of the night starving. In fact, those people who are most guilty of midnight snacking often have a disorder where their pancreas releases insulin into the bloodstream during the night, waking them up almost immediately and sending them hunting for food. The cause of this disorder can range from dietary (stimulants late in the day) to environmental (lights left on in the room, noises causing an adrenalin release, etc.) to disease (pancreatic cancer) or genetic (cystic fibrosis). This effect is observable in rats and humans. Insulin immediately shuts off the flow of triglycerides into the bloodstream from fat cells.
What, then, is "fat adaptation" if everybody releases fat from their fat cells any time their small intestine isn't full of food? Fat adaptation is a sliding scale indicating your body's ability (in particular, your liver's ability) to harness fat for energy in preference to carbohydrate. It doesn't turn on and off. It's a measure of how well your body convert fats into ketones. Some few fats, like 60% of coconut oil, or medium-chain triglyceride oil, can convert to ketones directly in the small intestine in the presence of digestive enzymes. Most others must be broken down by the liver before they are useful for energy. Some are useful to cells as-is (such as saturated fats) for building intra-cellular structures such as cell walls. It takes some time for your body to ramp up this ability to convert fats into ketones, and the most effective way to do this in the briefest time is to
deprive your body of almost all carbohydrate for a few weeks.
That's all fat adaptation is. In fact, if you low-carb for long enough and lose enough body fat, your body becomes so efficient at using ketones for energy that even if you eat almost zero carbs, you stop turning the ketone strips purple when you urinate on them. Ketones in urine is a measure of the inefficiency of your body at using ketones for fuel. It's over-producing and the kidneys are filtering the excess into your urine.
I'm discovering as my own body fat approaches the teens, contrary to my previous belief, you basically have to be pretty fat to turn the ketone strips purple consistently while burning body fat on low-carb. Your fat cells are much like balloons: the larger and full they are, the more forcefully they will push triglycerides back into the bloodstream. This is, ultimately, why many people get fat on high-carb: obesity is a disorder of excess fat accumulation. The fat cells are taking in more than they are giving back. Most fat people don't have any problem maintaining their weight (perhaps with very slow gains); it's just the weight they are maintaining is way too high. With too much insulin release due to dietary choices or genetics, their fat cells never release enough triglyceride to fuel their body between meals, and they eat because their lean tissues are literally starving for nutrition while their fat cells refuse to release the stored energy due to insulin in the bloodstream.
Anyway, fat adaptation isn't an on-and-off thing. You must give your body enough time to ramp up production of enzymes to use fat as a primary fuel in place of carbohydrates, but once fat-adapted you'll stay that way for a while. That's the heart of a cyclical ketogenic diet like MANS: your body remains mostly fat-burning for a few days even when you resume consuming carbs. If the timing and quantity of your carbohydrate intake is precise, almost no glucose is stored as triglyceride in fat cells, but goes to muscle and liver stores of glycogen instead.
Here's a great video overview of the role of fat in daily metabolism:
http://www.youtube.com/watch?v=mNYlIcXy ... annel_page--Matt B.