There Is Interest In Whether Autophagy Can Increase The Lifespan Of Whole Organisms Though So Far This Has Only Been Replicated In Animals
There is interest in whether autophagy can increase the lifespan of whole organisms, too though so far this has only been replicated in animals, like 1mm-long nematode worms and mice, and not humans . Until there are longitudinal studies of human intermittent fasters, it is too soon to say that it will extend our lifespans.
But, other animal studies have linked autophagy to improvements in immune system memory. The fact that autophagy is essential to maintain cell health has also generated interest in its role in cancer suppression. There might be more reasons than increasing lifespan to take interest in autophagy.
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Unlike calorie-restrictive diets , the purpose of intermittent fasting is to increase the amount of time between the last meal of one day and the first of the next. This could help to promote autophagy, but to understand how we should look at what happens to us after we eat.
Eating even a small bite before bed extends the “fed state”, meaning you may never achieve ketosis before your next meal
When you stop eating at 19:00 you will still be in the fed state until 22:00 because you will still be digesting nutrients, says Clarkson. Any carbohydrates in your diet will give you a nice supply of glucose, our premium source of fuel, for a few hours.
Intermittent Fasting For Beginners
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Isnt It Important To Have Breakfast Every Morning
Not necessarily. This appears to be an old misconception, based on speculation and statistics, and it does not hold up when its tested.57 Skipping your morning meal gives your body more time to burn fat for energy. Since hunger is lowest in the morning, it may be easiest to skip it and break your fast later in the day.58
So Is Intermittent Fasting As Good As It Sounds
According to metabolic expert Dr. Deborah Wexler, Director of the Massachusetts General Hospital Diabetes Center and associate professor at Harvard Medical School, says “there is evidence to suggest that the circadian rhythm fasting approach, where meals are restricted to an eight to 10-hour period of the daytime, is effective.” But still she recommends that people “use an eating approach that works for them and is sustainable to them.”
So, heres the deal. There is some good scientific evidence suggesting that circadian rhythm fasting, when combined with a healthy diet and lifestyle, can be a particularly effective approach to weight loss, especially for people at risk for diabetes.
Dangers Of Insulin Resistance
Insulin resistance causes an imbalance between the storage and uptake of glucose in your cells, and causes a high concentration of sugar in your blood. When your blood sugar levels rise above a healthy range, it puts you at risk of diabetes.
Diabetes is a disease classified by having chronically high blood sugar. If your blood sugar rises above normal levels, but isnt high enough to signify diabetes, your doctor will refer to it as prediabetes. According to the Centers for Disease Control and Prevention , roughly one in three Americans are prediabetic.
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Wont Intermittent Fasting Burn Muscle
That depends on the person and the duration of the fast. During fasting, the body first breaks down glycogen into glucose for energy. After that, the body increases body fat breakdown to provide energy.
Excess amino acids are also used for energy, but the body does not burn its own muscle for fuel unless it has to.49
Some studies, however, suggest that leaner individuals are at higher risk of lean body mass loss, and even reduced metabolic rate. Yet it appears this is less of a concern with overweight subjects.50
Isnt Fasting The Same As Reducing Calories
No, not necessarily. Fasting can reduce the time you spend eating and primarily addresses the question of when to eat.62 Calorie reduction addresses the question of what and how much to eat. They are separate issues and should not be confused with each other.
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Will I Lose Weight
Most likely.64 If you have weight to lose, it is extremely likely that you will lose weight if you do not eat.
In theory, its possible to eat more after fasting, of course, cancelling out the weight lost. But studies generally show that most people tend to eat significantly less overall.65
I call intermittent fasting the ancient secret of weight loss because it might be one of the most powerful dietary interventions for weight loss, yet it has been mostly ignored by doctors and dietitians for a long time.66
My Initial Fasting Experience
Knowing the potential health benefits of intermittent fasting for women, I was eager to give it a try. Unfortunately, I failed MISERABLY at my first attempt. Lets just say I did NOT experience increased energy and clear-mindedness.
The first day I under-ate and couldnt sleep for hunger pangs. The next day, tired and cranky, I overate with the veracity of a starved animal. Thats when my hunger and hormone roller coaster began. And after one full week of this, I had to quit.
As a physician I wondered if other women had experienced something similar. And when I searched the internet, I discovered that, across message boards, blogs and online communities, women were complaining about intermittent fasting and its effect on their hormones. In fact, there was scientific literature that supported all of our experiences.
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Intermittent Fasting In Aging Women
Puberty, periods, maybe pregnancy and postpartum. What a rollercoaster.
Then comes menopause, another hormonal transition point in womens lives that can stir us up physically, psychologically, and socially.
Women in this phase may be returning to themselves after decades of being devoted to children, spouses, and careers. Or, they may be busier than ever, taking care of aging parents and young adult kids.
Whatever the context, increasing age often triggers a desire to focus on health.
Some women become interested in intermittent fasting because of its association with longevity. Others just want to lose fat in an uncomplicated way.
While we dont have quality science on whether or not intermittent fasting is beneficial to women who are menopausal or post-menopausal, we do know that restricting food is also a stressor.
Women who worry about limiting food intake to manage body weight tend to have higher levels of cortisol, a stress hormone, than women who dont.24 Add that to the sleep disruptions so common in menopause, and your stress bucket is getting pretty full.
Lower estrogen levels also means your body has a decreased capacity to deal with stress. That bucket fills up quicker than it used to.
Even though many stressors are good for uslike exercise, learning, and changethey only make us stronger if we give ourselves the chance to recover from them.
So, if youre a woman in this hormonal phase, try intermittent fasting only if:
Intermittent Fasting Does Not Cause Yo
The term yo-yo dieting refers to the cyclical loss and gain of weight over time, akin to a yo-yo moving up and down.
This yo-yo effect occurs among extremely restrictive and unsustainable diets that cause shifts in your hunger hormones. This is why you end up with almost uncontrollable food cravings and feelings of starvation.
Think water fasts, Goop detoxes and cleanses, and very low calorie diets.
Recent research indicates that 24 hours is not enough time for severe calorie restriction to kick your appetite hormones into overdrive .
Said another way, when fasting is broken up into intervals it doesnt cause the yo-yo effect.
That means intermittent fasting can significantly cut calories without any major impact on your feelings of hunger.
Summary: Research shows that one day of severe calorie restriction is not enough to negatively influence your hunger hormones, which is what occurs during yo-yo diets.
Are There Any Benefits Of Intermittent Fasting For Women
Based on what we know, intermittent fasting probably affects reproductive health if the body sees it as a significant stressor.
Anything that affects your reproductive health affects your overall health and fitness.
Even if you dont plan to have biological kids.
But intermittent fasting protocols vary, with some being much more extreme than others. And factors such as your age, your nutritional status, the length of time you fast, and the other stressors in your lifeincluding exerciseare also likely relevant.
And, as we mentioned in the research update box above, there may be some support for trying intermittent fasting in women who have PCOS.
But for most women, intermittent fasting is probably not the best approach.
How Insulin Resistance Develops
Researches have yet to indicate a single cause of insulin resistance however, a diet rich in sugar and processed carbohydrates may be to blame. When you eat a meal rich in carbohydrates, sugar rapidly enters your bloodstream and a rush of insulin follows. If sugar continues to enter your bloodstream, your pancreas will continually release insulin but your pancreas cant keep that up forever.
Alcohol and caffeine, and soda are also culprits that can increase your blood sugar levels. And so can too little exercise, poor sleep patterns, and elevated stress levels.
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How Do I Manage Hunger
The most important thing to realize is that hunger usually passes like a wave. Many people worry that hunger during intermittent fasting will continue to build until it is intolerable, but this does not normally happen.46 Instead, hunger comes in a wave. If you simply ignore it and drink a cup of tea or coffee, it will often pass.47
During extended fasts, hunger will often increase into the second day. After that, it gradually recedes, and many people report a complete loss of hunger sensation by day 3 or 4.48 Your body is now being powered by fat. In essence, your body is eating its own fat for breakfast, lunch and dinner and therefore is no longer hungry. Learn more
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Ways To Use This Information For Better Health
Best Intermittent Fasting Schedules To Reduce Insulin Resistance
Popular intermittent fasting protocols range from fasting a few hours each day, fasting every other day, or doing a modified fast a few days of the week. So, theres not a single, best way to fast to improve your insulin sensitivity. Studies conducted on humans show the best type of IF schedule is the one that works for you.
One 2018 study showed a 18:6 fasting protocol , improved insulin sensitivity in men with prediabetes. Another smaller study of patients with diabetes showed that various schedules of 24-hour fasts were beneficial to reducing insulin resistance. This review of 12 studies of patients following some form of IF showed insulin sensitivity improved, regardless of the type of fasting protocol they followed.
IF is flexible. According to Jason Fung MD, founder of The Fasting Method, the most crucial factor of an IF diet is the fasted state will lower your insulin levels. The style of intermittent fasting that fits your lifestyle and is easiest to maintain will be your most effective way to fast for better insulin sensitivity.
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Intermittent Fasting And Ovulation
If youre trying to conceive, intermittent fasting could make things difficult.
Fasting can inhibit ovulation. If you arent ovulating, no egg gets released. If no egg gets released, it cant be fertilized.
Some women may have been told by doctors or other health professionals to lose weight before becoming pregnant. Many women, when considering pregnancy, start to think about their health more seriously and consider weight loss as a step in this direction.
Whatever the reason for considering intermittent fasting, know this: For hormonal harmony, for most women, intermittent fasting is not the best weight lossprotocol to consider.
Most women in the reproductive phase of life do best with moderate, sustainable good nutrition habits.
Unless a womans getting paid to look or perform a certain way , compromising fertility and hormonal balance may not be worth it.
Is Intermittent Fasting Healthy
Simple and easy to follow, intermittent fasting is a type of diet that requires you to only eat during a specific span of time and spend the rest of the day fasting. When done properly, intermittent fasting can help you lose weight, making it easier for you to also adjust to a healthier diet.
More than weight loss, research by John Hopkins Medicine reveals that there is also clear evidence to suggest that there are other intermittent fasting benefits. Through a good intermittent fasting diet plan, you can also enjoy a bevy of other health benefits, including:
Aside from being an effective weight loss solution, intermittent fasting has a lot of other health benefits. Pixabay
1. Lose Belly Fat Intermittent fasting leads to lower calorie consumption, which contributes to weight loss. Not only does intermittent fasting reduce your calorie intake, but it also increases your overall metabolic rate, improving your bodys ability to focus on weight loss management.
2. Lower Diabetes Risk Another benefit is that this diet helps lower your risk of developing diabetes. Research has shown that intermittent fasting improves insulin resistance within the body, leading to lower blood sugar levels.
3. Better Heart Health Lower blood sugar levels also mean healthier circulation, which translates to better heart health. Additionally, intermittent fasting helps lower blood pressure and cholesterol levels.
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Intermittent Fasting And Ketogenic Diet Are The Perfect Combo
Doing intermittent fasting with the keto-green diet makes us reach ketosis quicker. Ketosis is a state when the body relies on fats for fuel or energy. This is the secret why you dont get hungry even if you dont eat for hours!
Dr. Anna Cabeca, a triple board-certified physician and womens hormone expert, created the Keto-Green way of eating. It has helped thousands of women who have adrenal fatigue and menopause symptoms. In the Keto-Green, you can eat:
- Alkaline foods such as artichokes, asparagus, broccoli, cauliflower and other similar veggies.
- Fruits such as avocado, berries, apples and apricots.
- Healthy proteins such as grass-fed meat and wild caught fish.
- Non-GMO soy from miso and tempeh.
- Healthy fats like ghee, nuts, olive and coconut oil.
- Superfoods such as Maca, Turmeric, Cinnamon and Green Tea.
If youre serious about feeling better, losing weight and getting rid of menopause symptoms, you should take Dr. Annas keto-green diet course. Did I tell you that its FREE?SIGN-UP RIGHT AWAY FOR THE 10-Day Masterclass!
I enjoy doing intermittent fasting. Its been part of my life for so long that it has become a habit that I cant do without!
Some say that its unsafe for menopausal women with adrenal problems to do keto-green and intermittent fasting, but Dr. Berg says otherwise! Listen to Dr. Berg clear this up :
Ways How Intermittent Fasting Changes Your Menopause Journey
Intermittent fasting means that you eat within a certain period of the day or of the week, depending on what IF protocol you follow. Its one of my menopause heroes! Fasting changed my relationship with food and my body.
If our bodies could speak, it would definitely say that it needs a break! The body does not need fuel all the time. Let it rest and it will pay you back big time!
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What The Most Recent Research Says
Itd be nice to find big, long-term, human studies to illustrate the science described here, but, unfortunately, theres nothing that really gives us a full picture.
We do, however, have a few puzzle pieces to help us get a better idea of whats going on.
The glucose tolerance study
The few studies that do compare men and women tend to be relatively short term.
One 2005 study published in Obesity Research tested eight men and eight women, all non-obese, who were instructed to fast on alternate days for a period of three weeks.
After the three weeks, men had improved insulin sensitivity, and their glucose response was unchanged.
The women, however, showed no change in insulin response, but their glucose tolerance was slightly worse than it was than before the experiment started.18
In other words, a short intermittent fasting protocol improved mens blood sugar response, but impaired womens.
Note: For people with diabetes who already have compromised glucose tolerance, fasting would likely cause further issues with glucose regulation. People with diabetes should avoid IF.19
The stress response study
A 2018 study performed at the Lithuanian Sports University observed eleven overweight women undergoing a two-day fast.
Compared to their regular state , the women who fasted experienced an increase in sympathetic nervous activity. This increase hasnt been found in men under the same conditions.
The PCOS study
Intermittent fasting decreases kisspeptin.22