禁食和限時(shí)飲食對(duì)減脂和健康的影響【Huberman Lab Ep. 41】

intermittent fasting & time-restricted feeding
and their impact on weight loss/muscle maintenance/organ health (gut/liver)/genome/epigenome/inflammation
Higher blood glucose is associated with mortality: As people age, resting blood glucose goes up. The reductions in metabolism as we age is not as strong as we thought.
the incremental increasing of resting blood glucose predicts the mortality
There is no significant difference in weight loss between people following a healthy low carbohydrate diet and those following a healthy low-fat diet
Non exercise Induced Thermogenesis
Hormones:
Most calories intake during puberty is directed towards protein synthesis
What you eat and when you eat sets the condition of your body
When you eat is as important as what you eat when it comes to health parameters, in particular, liver health and mental health
When we eat, our blood sugar/blood glucose/insulin (mobilize glucose from the bloodstream)
How much the glucose and insulin go up depends on what you eat and how much you eat.
In general, simple sugars, including fructose from fruit, sucrose and glucose can increase your insulin and blood glucose more than complex carbohydrates which will raise blood sugar more than fibrous carbohydrates.
Protein has the modest impact on glucose while fat has the lowest impact on raising your blood glucose and blood insulin
The longer since your last meal, the lower your blood glucose and insulin will be and the higher things like GLP1-A type of hormone involved in mobilizing various energy sources from the body, including fat through what we call lipolysis when you are in a low blood glucose and higher
ad libitum feeding
nocturnal
diurnal
crepuscular human is most active in the morning in the evening.
The feeding time should fall on the most active phase of our 24hours circle
80% of our genes follow the 24 hours schedule
These clock genes underwent a regular entrainment, a locking in to the proper 24-hour schedule
The time when you have access to feeding/light/sleep motivate every cell in your body in a particular way.
Time restricted feeding keeps the expression of genes regular. Conversely, eating whenever you want makes them out of whack: liver suffers (liver is involved in the production of hormones)
digestion/gastric emptying involve certain cellular functions and activate genes who are pro-inflammatory markers.
These inflammatory markers nor not inherently bad because they are there in order to respond to certain challenges like immune challenges/the ingestion and the breakdown of food. In an ideal circumstance, they are reduced in the period in which there is no food in the digestive tract
Time restricted feeding also is related to the expression of brown fat which is conducive to increase your metabolism
Ky pillars of intermittent fasting
For the first hour or even longer after we wake, do not ingest any food
For the two and ideally three hours prior to bedtime, do not ingest any calories
Autophagy (cleaning up and gobbling up dead or injured cells) and mainly occurs during sleep
Eating window should be tacked to sleep based fasting in a way that makes it easier for you to get into the fasted state
Lymphatic system involves sweeping out a garbage disposal, a clearing out of the metabolic debris and some of the autophagy
Sleep under fasted state is beneficial for us to undergo automatic cellular processes that clear our debris from our brain, offset dementia
Tapering off or transition from feeding to a fasted state can also allows us to capitalize on a special period of a fasted state-sleep-related fasting.
One important caveats are related to those who are interested in increasing mustle mass
The food volume and type relate to whether or not you quickly or slowly enter a fasted state.
There are at least three factors impacting how quickly our transition from ingesting to a fasted state.
Finishing a last bite of food doesn't mean the start of our fasted state
The larger volume of food takes longer time to digest than smaller one.
Leaning to gauge food volume by making ourself familiar with the feeling of comfortabaly full.
Food with lots of fat tends to slow gastric emptying time.
Digesting calories with the form of liquid means that gastric emptying time is going to be faster.
Food like pure sugar leading to steep rise of blood sugars will make our gulcose grop more quickly after skyrocketing while they tend to be a more gradual rise in glucose when combining with fat.
Fibrous foods will also create a more lasting sustained release in glucose
Our actual feeding window is longer then we supposed we are.
There is always a little bit of taper on either side of feeding window
A shorter feeding window (less than 8 hours) often leads to overeating with respect to their metabolic needs
Having the feeding window early in the day would actually be very beneficial.
The cutoff for when you would want to eat protein could be sometime before 10:00 AM which favors hypertrophy
Shifting feeding window frequently disrupts circadian clock mechanisms
There are factors that can accelerate our transition from a fed state to a fasted state
Clearing out of glucose in your systems can be accomplished by light movement or exercise which increase gastric exercise.
High Intensive Interval training earlier in the day causes the blood glucose increase while training later in the day causes the blood glucose decrease in a day.
Extending the duration of your fasted state as long as you can provided that you are compatible with your eating style.
These so-called glucose disposal agents will make you experience splitting headache If you take it before a less carbohydrate-inclusive meal. (Metformin/Berberine).
You are along for the ride at least until the effects of that particular compound wear off.
You are biasing yourself towards a biological state of cellular growth during a fed state while towards a biological state of cellular repair during a fasted state.
Intermittent fasting improves the microbiomes in gut, in particular in the treatment of irritable bowel syndrome and other forms of colitis in time because the clock genes impact the mucosal lining.
Alternate day fasting has gotten a safe bill of health.
Any consumption of sugar particularly simple sugars will disrupt the expression of circadian genes related to fasting state
Digesting carbohydrates with a little fat can blunt the rise of glucose and extend the duration of glucose release.
Cinnamon/Lemon/lime is a mild glucose disposal agent because of the acidity on blood glucose levels.
Salt water has effects on blood glucose disposal and stabilizing blood volume/offsetting the churning and yearning of appetite which make people enjoy clarity of mind