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How Gut Bacteria Help
Make Us Fat and Thin
• Until recently, the assumption was that the bacteria huddling in your intestine
pretty much mind their own business. But now a growing body of research
suggests that your internal community of bacteria, known as a microbiota , could
be influencing your metabolism and, surprisingly, affecting your weight.
• For example, having a greater abundance of a
recently discovered type of bacteria called
Christensenellaceae in your gut is associated
with being slim, while having less of the bacteria
is linked to being obese, most of us harbor the
bacteria—it was detected in 96 percent of the
study samples—
christensenella minuta
• Christensenellaceae isn't the only bacteria that might affect your
jeans size.A diverse mixture of microbes in the gut seems to be one
key to staying slim. In fact, a 2013 study found that lean people have
70 percent more gut bacteria and therefore a more diverse microbiota
than that of their overweight peers.
• your gut microbiota plays a role in processing food and helping to
determine how many calories and nutrients your body absorbs. Certain
intestinal microbes may also alter your sensitivity to insulin—the
hormone that moves sugar out of your blood—so that your body burns
fat it would have otherwise stored.
• Your gut bacteria might affect how hungry you are too. One
key microbe appears to be Helicobacter pylori, the bacterium
that is involved in causing ulcers and stomach cancer. Antibiotic
treatments have helped cut H. pylori infection rates in half in
recent decades, which is good news for ulcer sufferers—but
which could be bad news for our waistlines.
• It turns out that H. pylori also dials back the stomach's
production of the hunger hormone ghrelin. "When you wake up
in the morning and you're hungry, it's because ghrelin is telling
you to eat," says Martin Blaser, M.D., a professor of medicine
and microbiology at NewYork University and the author of the
book Missing Microbes. "When you eat breakfast, your level of
ghrelin usually goes down, but if you don't have Helicobacter in
your system, it doesn't."The end result:You could eat more.
Helicobacter pylori
• You might not even have to take antibiotics to feel
their effects on your gut bacteria.The heavy reliance
on antibiotics by the food industry, which routinely
uses the drugs in feed to keep livestock healthy, may
be fueling the rise of obesity by disrupting the fine
balance of our intestinal microbes, some experts
believe. "The obesity epidemic really took off in the
last 20 years in the U.S. So the question is, what
happened then?What was a large segment of the
population exposed to that could account for this
massive weight gain?" asks Lee Riley, M.D., a
professor of epidemiology at the University of
California, Berkeley.
• He points out that that's when the number of large-
scale densely packed factory farms expanded, which
also increased the use of antibiotics in livestock feed.
• While some of your gut bacteria is determined by
genetics, lifestyle and dietary habits can have a
dramatic impact on your mix of beneficial and harmful
microbes.A study in the journal Nature found that
when people switched from their normal diet to one
consisting primarily of meat and cheese, there was an
almost immediate increase in Bilophila, a type of
bacteria that has been linked to colitis, but that a
plant-based diet decreased the levels. Bilophila wadsworthia
• Today, 80 percent of the antibiotics sold in the United States go toward helping
animals remain healthy and gain more weight in crowded conditions. "Counties with
the highest prevalence of obesity are those counties with large concentrated animal
feeding operations," he says.
• Not to mention that antibiotics are often used when they shouldn't be, as when
doctors prescribe them for viral infections or because patients demand them.
• The interaction between diet and gut bacteria can predispose us
to obesity from the day we are born, as can the mode by which
we enter the world. Studies have shown that both formula-fed
babies and infants delivered by cesarean section have a higher
risk for obesity and diabetes than those who are breast-fed or
delivered vaginally.
• Working together, Rob Knight of the University of Colorado
Boulder and Maria Gloria Dominguez-Bello of N.Y.U. have found
that as newborns traverse the birth canal, they swallow bacteria
that will later help them digest milk.C-section babies skip this
bacterial baptism. Babies raised on formula face a different
disadvantage: they do not get substances in breast milk that
nurture beneficial bacteria and limit colonization by harmful
ones.
• According to a recent Canadian study, babies drinking formula
have bacteria in their gut that are not seen in breast-fed babies
until solid foods are introduced.Their presence before the gut
and immune system are mature, says Dominguez-Bello, may be
one reason these babies are more susceptible to allergies,
asthma, eczema and celiac disease, as well as obesity.
Here are four simple steps you can take starting
today to help keep your intestinal bacteria robust :
• Eat more fiber. It's the number-one thing you can do.
New research suggests that fiber nourishes your
microbes, making them diverse and more likely to help
keep you slim.
• Avoid the temptation to buy processed foods that have
added fiber. Instead, eat vegetables, fruits and whole
grains.Aim for at least two to three servings each of
produce and whole grains and 20 to 30 grams of fiber a
day.
• These foods also provide prebiotics, which are
essentially a type of fiber that your gut bacteria
flourishes on.
• Some plants, like sunchokes, garlic and leeks, are packed
with prebiotics. Bananas and whole-wheat breakfast
cereals are other good sources.
• Snack smarter. The fact that we consume so
much added sugar—more than 22 teaspoons a day
for the average person—could actually be starving
our gut flora.
• Bacteria need complex carbohydrates, like legumes
and whole grains, in order to thrive. So when you
get too many calories from sweets, you're leaving
your microbes hungry.
• They either die or adapt by feeding on the mucus
inside your intestine, which, experts hypothesize,
could contribute to low-level inflammation, a
condition that has been linked to obesity. Instead of
grabbing a cookie when your stomach starts
growling at 3:00 p.m., reach for a handful of nuts or
an apple.
• Check labels for hidden sugars in foods like pasta
sauce and salad dressing.And choose brown rice
and whole-grain pasta instead of white.
• Pick probiotic foods. If prebiotics are like fertilizer
for your microbial garden, probiotics are like seeds.
• The best way to get them is by regularly eating
fermented foods such as yogurt, kefir, sauerkraut and
miso. And about yogurt, is the one most strongly
correlated with weight loss.
• The average person gained almost a pound a year,
but people who regularly ate yogurt actually lost
weight.
• Choose plain Greek yogurt and mix in pomegranate
seeds or your favorite berries for a hit of fiber.
• Move your body. Your bacteria might benefit from a
good workout as much as you do. Exercisers with a normal
BMI had more diverse microbes than exercisers with a high
BMI, according to a recent Irish study of male rugby
players.They also had higher levels of Akkermansiaceae, a
type of bacteria that has been linked to lower obesity rates.
So sweat daily to trim your gut—and to boost your gut
bacteria. Akkermansia muciniphila
• By:
AmeeraAmeer
1334338

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Diet normal flora

  • 1. How Gut Bacteria Help Make Us Fat and Thin
  • 2. • Until recently, the assumption was that the bacteria huddling in your intestine pretty much mind their own business. But now a growing body of research suggests that your internal community of bacteria, known as a microbiota , could be influencing your metabolism and, surprisingly, affecting your weight. • For example, having a greater abundance of a recently discovered type of bacteria called Christensenellaceae in your gut is associated with being slim, while having less of the bacteria is linked to being obese, most of us harbor the bacteria—it was detected in 96 percent of the study samples— christensenella minuta • Christensenellaceae isn't the only bacteria that might affect your jeans size.A diverse mixture of microbes in the gut seems to be one key to staying slim. In fact, a 2013 study found that lean people have 70 percent more gut bacteria and therefore a more diverse microbiota than that of their overweight peers.
  • 3. • your gut microbiota plays a role in processing food and helping to determine how many calories and nutrients your body absorbs. Certain intestinal microbes may also alter your sensitivity to insulin—the hormone that moves sugar out of your blood—so that your body burns fat it would have otherwise stored. • Your gut bacteria might affect how hungry you are too. One key microbe appears to be Helicobacter pylori, the bacterium that is involved in causing ulcers and stomach cancer. Antibiotic treatments have helped cut H. pylori infection rates in half in recent decades, which is good news for ulcer sufferers—but which could be bad news for our waistlines. • It turns out that H. pylori also dials back the stomach's production of the hunger hormone ghrelin. "When you wake up in the morning and you're hungry, it's because ghrelin is telling you to eat," says Martin Blaser, M.D., a professor of medicine and microbiology at NewYork University and the author of the book Missing Microbes. "When you eat breakfast, your level of ghrelin usually goes down, but if you don't have Helicobacter in your system, it doesn't."The end result:You could eat more. Helicobacter pylori
  • 4. • You might not even have to take antibiotics to feel their effects on your gut bacteria.The heavy reliance on antibiotics by the food industry, which routinely uses the drugs in feed to keep livestock healthy, may be fueling the rise of obesity by disrupting the fine balance of our intestinal microbes, some experts believe. "The obesity epidemic really took off in the last 20 years in the U.S. So the question is, what happened then?What was a large segment of the population exposed to that could account for this massive weight gain?" asks Lee Riley, M.D., a professor of epidemiology at the University of California, Berkeley. • He points out that that's when the number of large- scale densely packed factory farms expanded, which also increased the use of antibiotics in livestock feed.
  • 5. • While some of your gut bacteria is determined by genetics, lifestyle and dietary habits can have a dramatic impact on your mix of beneficial and harmful microbes.A study in the journal Nature found that when people switched from their normal diet to one consisting primarily of meat and cheese, there was an almost immediate increase in Bilophila, a type of bacteria that has been linked to colitis, but that a plant-based diet decreased the levels. Bilophila wadsworthia • Today, 80 percent of the antibiotics sold in the United States go toward helping animals remain healthy and gain more weight in crowded conditions. "Counties with the highest prevalence of obesity are those counties with large concentrated animal feeding operations," he says. • Not to mention that antibiotics are often used when they shouldn't be, as when doctors prescribe them for viral infections or because patients demand them.
  • 6. • The interaction between diet and gut bacteria can predispose us to obesity from the day we are born, as can the mode by which we enter the world. Studies have shown that both formula-fed babies and infants delivered by cesarean section have a higher risk for obesity and diabetes than those who are breast-fed or delivered vaginally. • Working together, Rob Knight of the University of Colorado Boulder and Maria Gloria Dominguez-Bello of N.Y.U. have found that as newborns traverse the birth canal, they swallow bacteria that will later help them digest milk.C-section babies skip this bacterial baptism. Babies raised on formula face a different disadvantage: they do not get substances in breast milk that nurture beneficial bacteria and limit colonization by harmful ones. • According to a recent Canadian study, babies drinking formula have bacteria in their gut that are not seen in breast-fed babies until solid foods are introduced.Their presence before the gut and immune system are mature, says Dominguez-Bello, may be one reason these babies are more susceptible to allergies, asthma, eczema and celiac disease, as well as obesity.
  • 7. Here are four simple steps you can take starting today to help keep your intestinal bacteria robust : • Eat more fiber. It's the number-one thing you can do. New research suggests that fiber nourishes your microbes, making them diverse and more likely to help keep you slim. • Avoid the temptation to buy processed foods that have added fiber. Instead, eat vegetables, fruits and whole grains.Aim for at least two to three servings each of produce and whole grains and 20 to 30 grams of fiber a day. • These foods also provide prebiotics, which are essentially a type of fiber that your gut bacteria flourishes on. • Some plants, like sunchokes, garlic and leeks, are packed with prebiotics. Bananas and whole-wheat breakfast cereals are other good sources.
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  • 9. • Snack smarter. The fact that we consume so much added sugar—more than 22 teaspoons a day for the average person—could actually be starving our gut flora. • Bacteria need complex carbohydrates, like legumes and whole grains, in order to thrive. So when you get too many calories from sweets, you're leaving your microbes hungry. • They either die or adapt by feeding on the mucus inside your intestine, which, experts hypothesize, could contribute to low-level inflammation, a condition that has been linked to obesity. Instead of grabbing a cookie when your stomach starts growling at 3:00 p.m., reach for a handful of nuts or an apple. • Check labels for hidden sugars in foods like pasta sauce and salad dressing.And choose brown rice and whole-grain pasta instead of white.
  • 10. • Pick probiotic foods. If prebiotics are like fertilizer for your microbial garden, probiotics are like seeds. • The best way to get them is by regularly eating fermented foods such as yogurt, kefir, sauerkraut and miso. And about yogurt, is the one most strongly correlated with weight loss. • The average person gained almost a pound a year, but people who regularly ate yogurt actually lost weight. • Choose plain Greek yogurt and mix in pomegranate seeds or your favorite berries for a hit of fiber. • Move your body. Your bacteria might benefit from a good workout as much as you do. Exercisers with a normal BMI had more diverse microbes than exercisers with a high BMI, according to a recent Irish study of male rugby players.They also had higher levels of Akkermansiaceae, a type of bacteria that has been linked to lower obesity rates. So sweat daily to trim your gut—and to boost your gut bacteria. Akkermansia muciniphila