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Intermittent fasting has been gaining popularity among people looking to shed extra kilograms and maintain a healthy weight. Researchers argue that this type of diet may also slow down aging and disease.
Intermittent fasting can help with weight management, but might it also bring other health benefits?

In intermittent fasting, what essentially takes place in the body is that one source of energy — which can facilitate the accumulation of body fat — is switched for another.
Our bodies run on glucose, or simple sugar, but when we fast for a longer period of time, that energy source becomes unavailable.
Our system needs to identify a different kind of "fuel." That is when the body begins to convert certain types of body fat into fatty acids, which are easily absorbed by the blood.
Fatty acids, in turn, produce molecules called ketones, which the body uses as its new source of energy.
Stephen Anton, a researcher at the University of Florida College of Medicine in Gainesville, calls this process "flipping the metabolic switch."
"This switch," explains Anton, "can happen after a certain period of time fasting. It's a gradation in which your metabolism over time shifts to use higher and higher amounts of ketones for energy."
He and his team were interested to learn more about how this switch occurs, and whether it could bring other health benefits, alongside weight management.
For this purpose, they reviewed numerous recent studies focused on the mechanisms and benefits of intermittent fasting.
The team's review, published in the journal Obesity, suggests that intermittent fasting may be more healthful than other dieting strategies, as ketones put less stress on cells than the byproducts of other dieting styles.

Significant weight loss regardless of style

Anton and his colleagues explain that the switch usually begins to take place after 8–12 hours of fasting, though in the case of individuals who practice intermittent fasting, the fasting strategies vary.
The researchers focused on the two most common types of intermittent fasting diets, the first of which is based on time restrictions for eating.
In it, the dieter may fast for a number of hours per day — for instance, 16 hours — while allowing themselves to eat anything they'd like over the remaining hours.
For the second type of intermittent fasting, dieters may choose to alternate days of total fasting, with days when no food is off limits.
Or they may simply alternate days of frugal eating — when individuals limit themselves to foods that equal only about 500 calories in all — with days of unrestricted eating, or "feasting days." "Of course," Anton notes, "we recommend healthy food [during the feasting times]."
The team's review of existing studies revealed that, all in all, any type of intermittent fasting diets are associated with significant weight loss.
In all 10 clinical trials assessing the effects of alternate-day fasting, the results conclusively pointed to this strategy's effectiveness when it came to shedding extra kilos. And, 3 out of the 4 studies focused on the restricted timing type of intermittent fasting had similar results.
"So in my mind, it's not a question of whether it works for producing fat loss," says Anton. What's more interesting and more important is what kind of tissue is lost through intermittent fasting.

Additional potential health benefits

Most of the studies reviewed by Anton and team revealed that, while participants did lose body fat, no significant amount of lean tissue — which includes organ tissue, muscular tissue, and bone tissue — was lost.
This is important, since lean tissue allows our bodies to keep on functioning well, and other types of dieting strategies, Anton notes, lead to significant loss of both fat and lean tissue, which may affect health in the long run.
Studies into the effect of the switch from glucose-driven energy to ketone-driven energy in rodents and other animals suggests that intermittent fasting could also have other health benefits, the scientists say.
The researchers say that it could help to prolong the lifespan, improve the functioning of metabolic processes, protect cognitive function, enhance physical performance, reduce harmful instances of inflammation, and shield against cardiovascular diseases.
"An important takeaway is that we all have the ability to switch our metabolism from glucose to ketone utilization. And that switch has the potential to have profound health benefits for us, in addition to the positive changes in body composition."
Stephen Anton
Still, the authors warn against starting intermittent fasting without first asking for a doctor's advice. This dieting style may not be equally beneficial for everyone, and in some cases it could do more harm than good, he cautions.

Sources : https://www.medicalnewstoday.com

Intermittent Fasting Have Profound Health Benefits

A form of intermittent fasting known as the 16:8 diet helps obese individuals to lose weight and lower their blood pressure, according to a new study.
fasting diet
Time-restricted eating may be the key to weight loss.
More and more people now turn to intermittent fasting as a fast and effective way to lose weight.
There are different form of this diet, depending on the time intervals of "fasting" and "feasting."
The so-called 5:2 diet, for instance, consists of eating normally for 5 days every week and fasting for 2 days.
In the fasting days, the dieter restricts their calorie intake to 500 or 600 per day.
In daily fasting, or the 16:8 diet, people eat whatever they like for 8 hours and fast for the remaining 16.
A new study evaluates the benefits of this 16:8 pattern for obese individuals and finds that not only does the diet work, but also that it helps to lower blood pressure.
As many as 93.3 million adults have obesity in the United States, according to the latest data from the Centers for Disease Control and Prevention (CDC). That's almost 40 percent of the country's entire population.
This research was led by corresponding author Krista Varady, an associate professor of kinesiology and nutrition at the University of Illinois at Chicago, and the findings were published in the journal Nutrition and Healthy Aging.

Losing weight without counting calories

Varady and colleagues recruited 23 obese study participants who were aged 45 years, on average, with an average body mass index (BMI) of 35.
Between 10 a.m. and 6 p.m., the participants could eat whatever and however much they liked, but they were only allowed to drink water and calorie-free drinks for the remaining 16 hours.
All the study participants were followed for a period of 12 weeks, and their dieting outcomes were compared with those of a previous weight loss trial of another type of intermittent fasting called "alternate day fasting."
In alternate day fasting, they can eat whatever they like for one day and fast for the following day.
On average, when compared with the control trial, those on the 16:8 diet consumed 350 fewer calories, lost 3 percent of their weight, and had lower blood pressure.
More specifically, the systolic blood pressure of those who fasted daily dropped by an average of 7 millimeters of mercury. However, insulin resistance, cholesterol, and fat mass remained the same between the two compared groups.
As Varady and her colleagues conclude, "These preliminary data offer promise for the use of time-restricted feeding as a weight loss technique in obese adults, but longer-term, large-scale randomized controlled trials [are required]."
The study's corresponding author also comments on the significance of the findings, saying, "The results we saw in this study are similar to the results we've seen in other studies on alternate day fasting."
"[B]ut," she adds, "one of the benefits of the 16:8 diet may be that it is easier for people to maintain. We observed that fewer participants dropped out of this study when compared to studies on other fasting diets."
"The take-home message from this study is that there are options for weight loss that do not include calorie counting or eliminating certain foods."
Krista Varady
"The 16:8 diet is another tool for weight loss that we now have preliminary scientific evidence to support," Varady concludes. "When it comes to weight loss, people need to find what works for them because even small amounts of success can lead to improvements in metabolic health."
Source : https://www.medicalnewstoday.com

Fasting Diet Actually Works, Study Finds

Cancer is the leading cause of death across the globe. For years now, researchers have led meticulous studies focused on how to stop this deadly disease in its tracks. How close are we to finding more effective treatments?

How far has cancer research come?
The World Health Organization (WHO) note that, worldwide, nearly 1 in 6 deaths are down to cancer.
In the United States alone, the National Cancer Institute (NCI) estimated 1,688,780 new cancer cases and 600,920 cancer-related deaths in 2017.
Currently, the most common types of cancer treatment are chemotherapy, radiotherapy, tumor surgery, and — in the case prostate cancer and breast cancer — hormonal therapy.
However, other types of treatment are beginning to pick up steam: therapies that — on their own or in combination with other treatments — are meant to help defeat cancer more efficiently and, ideally, have fewer side effects.
Innovations in cancer treatment aim to address a set of issues that will typically face healthcare providers and patients, including aggressive treatment accompanied by unwanted side effects, tumor recurrence after treatment, surgery, or both, and aggressive cancers that are resilient to widely utilized treatments.
Below, we review some of the most recent cancer research breakthroughs that give us renewed hope that better therapies and prevention strategies will soon follow suit.

Boosting the immune system's 'arsenal'

One type of therapy that has attracted a lot of attention recently is immunotherapy, which aims to reinforce our own bodies' existing arsenal against foreign bodies and harmful cells: our immune system's response to the spread of cancer tumors.
But many types of cancer cell are so dangerous because they have ways of "duping" the immune system — either into ignoring them altogether or else into giving them a "helping hand.
Therefore, some types of aggressive cancer are able to spread more easily and become resistant to chemotherapy or radiotherapy.
However, thanks to in vitro and in vivo experiments, researchers are now learning how they might be able to "deactivate" the cancer cells' protective systems. A study published last year in Nature Immunologyfound that macrophages, or white blood cells, that are normally tasked with "eating up" cellular debris and other harmful foreign "objects" failed to obliterate the super-aggressive cancer cells.
That was because, in their interaction with the cancer cells, the macrophages read not one but two signals meant to repel their "cleansing" action.
This knowledge, however, also showed the scientists the way forward: by blocking the two relevant signaling pathways, they re-enabled the white blood cells to do their work.

Therapeutic viruses and innovative 'vaccines'

A surprising weapon in the fight against cancer could be therapeutic viruses, as revealed by a team from the United Kingdom earlier this year. In their experiments, they managed to use a reovirus to attack brain cancer cells while leaving healthy cells alone.
"This is the first time it has been shown that a therapeutic virus is able to pass through the brain-blood barrier," explained the study authors, which "opens up the possibility [that] this type of immunotherapy could be used to treat more people with aggressive brain cancers."
Another area for improvement in immunotherapy is "dendritic vaccines," a strategy wherein dendritic cells (which play a key role in the body's immune response) are collected from a person's body, "armed" with tumor-specific antigens — which will teach them to "hunt" and destroy relevant cancer cells — and injected back into the body to boost the immune system.
In a new study, researchers in Switzerland identified a way to improve the action of these dendritic vaccines by creating artificial receptors able to recognize and "abduct" tiny vesicles that have been linked to cancer tumors' spread in the body.
By attaching these artificial receptors to the dendritic cells in the "vaccines," the therapeutic cells are enabled to recognize harmful cancer cells with more accuracy.
Importantly, recent studies have shown that immunotherapy may work best if delivered in tandem with chemotherapy — specifically, if the chemotherapy drugs are delivered first, and they are followed up with immunotherapy.
But this approach does have some pitfalls; it is difficult to control the effects of this combined method, so sometimes, healthy tissue may be attacked alongside cancer tumors.
However, scientists from two institutions in North Carolina have developed a substance that, once injected into the body, becomes gel-like: a "bioresponsive scaffold system." The scaffold can hold both chemotherapy and immunotherapy drugs at once, releasing them systematically into primary tumors.
This method allows for a better control of both therapies, ensuring that the drugs act on the targeted tumor alone.

The nanoparticle revolution

Speaking of specially developed tools for delivering drugs straight to the tumor and hunting down micro tumors with accuracy and efficiency, the past couple of years have seen a "boom" in nanotechnology and nanoparticle developments for cancer treatments.
nanoparticles
Nanoparticles could be 'a game-changer' in cancer treatment.
Nanoparticles are microscopic particles that have garnered so much attention in clinical research, among other fields, because they bring us the chance to develop precise, less invasive methods of tackling disease.
Vitally, they can target cancer cells or cancer tumors without harming healthy cells in the surrounding environment.
Some nanoparticles have now been created to provide very focused hyperthermic treatment, which is a type of therapy that uses hot temperatures to make cancer tumors shrink.
Last year, scientists from China and the U.K. managed to come up with a type of "self-regulating" nanoparticle that was able to expose tumors to heat while avoiding contact with healthy tissue.
"This could potentially be a game-changer in the way we treat people who have cancer," said one of the researchers in charge of this project.
These tiny vehicles can also be used to target cancer stem-like cells, which are undifferentiated cells that have been linked to the resilience of certain types of cancer in the face of traditional treatments such as chemotherapy.
Thus, nanoparticles can be "loaded" with drugs and set to "hunt down" cancer stem cells to prevent the growth or recurrence of tumors. Scientists have experimented with drug-filled nanoparticles in the treatment of various types of cancer, including breast cancer and endometrial cancer.
No less importantly, minuscule vehicles called "nanoprobes" can be used to detect the presence of micrometastases, which are secondary tumors so tiny that they cannot be seen using traditional methods.
Dr. Steven K. Libutti, director of the Rutgers Cancer Institute of New Jersey in New Brunswick, calls micrometastases "the Achilles' heel of surgical management for cancer" and argues that nanoprobes "go a long way to solving [such] problems."

Tumor 'starvation' strategies

Another type of strategy that researchers have been investigating of late is that of "starving" tumors of the nutrients they need to grow and spread. This, scientists point out, could be a saving grace in the case of aggressive, resilient cancers that cannot effectively be eradicated otherwise.
illustration of microscope and syringes
One novel method of 'attacking' cancer is by 'starving' cancer cells to death.
Three different studies — whose results were all published in January this year — looked at ways of cutting off cancers' nutritional supplies.
One of these studies looked at ways of stopping glutamine, a naturally occurring amino acid, from feeding cancer cells.
Certain cancers, such as breast, lung, and colon, are known to use this amino acid to support their growth.
By blocking cancer cells' access to glutamine, the researchers managed to maximize the impact of oxidative stress, a process that eventually induces cell death, on these cells.
Some aggressive types of breast cancer may be halted by stopping the cells from "feeding" on a particular enzyme that helps them to produce the energy they need to thrive.
Another way of depleting cancer cells of energy is by blocking their access to vitamin B-2, as researchers from the University of Salford in the U.K. have observed.
As one study author says, "This is hopefully the beginning of an alternative approach to halting cancer stem cells." This strategy could help individuals receiving cancer treatment to avoid the toxic side effects of chemotherapy.

Cancer treatments and epigenetics

Epigenetics refers to the changes caused in our bodies by alterations in gene expression, which dictate whether certain characteristics appear or if certain "actions" are affected at a biological level.
According to research that addressed the impact of such changes, many cancers, as well as the behaviors of cancer cells, are determined by epigenetic factors.
"Recent advances in the field of epigenetics have shown that human cancer cells harbor global epigenetic abnormalities, in addition to numerous genetic alterations."
Thus, it is crucial for specialists to understand when and where to intervene and the expression of which genes they may need to switch on or off, depending on their role in the development of cancer.
One study, for instance, found that the gene responsible for the advent of Huntington's disease produces a set of molecules whose action may actually prevent cancer from occurring.
Now, the researchers' challenge is to channel the therapeutic potential of this process without triggering Huntington's disease. However, the scientists are hopeful.
"We believe a short-term treatment cancer therapy for a few weeks might be possible," says the study's senior author.
Another recent study was able to establish that estrogen-receptor positive breast cancers that become resistant to chemotherapy gain their resilience through genetic mutations that "confer a metastatic advantage to the tumor."
But this knowledge also gave researchers the "break" that they needed to come up with an improved treatment for such stubborn tumors: a combination therapy that delivers the chemotherapeutic drug fulvestrant alongside an experimental enzyme inhibitor.

What does this all mean?

Cancer research is running at full speed, taking advantage of all the technological advances that science has achieved over recent years. But what does that mean in terms of coming up with a cure for cancer?
Whether or not there will ever be a cure for all cancer types is currently a matter of strong debate; although promising studies are published and covered by the media almost every day, cancer types vary immensely.
This makes it very difficult to say that an approach that works for one type will be adaptable to all.
Also, while there is much emerging research promising more effective treatments, most of these projects are still in their early stages, having conducted in vitro and in vivo experiments. Some potential treatments still have a long way to go before clinical trials in human patients.
Still, that doesn't mean we should lose all hope. Some researchers explain that these efforts should make us optimistic; while we may not be at the stage where we can claim that cancer can easily be eradicated, our furthered knowledge and ever more precise tools keep us ahead of the game and improve our odds in the fight against this disease.

Source : https://www.medicalnewstoday.com

Cancer: Are We Close To A Cure?

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