Announcement

Collapse
No announcement yet.

How Do You Know if You Are Lactose Intolerant?

Collapse
X
Collapse
  •  

  • How Do You Know if You Are Lactose Intolerant?

    Click image for larger version  Name:	cw.jpg Views:	0 Size:	188.3 KB ID:	1401


    When you eat dairy products, the body receives milk sugar - lactose. To break it down, a special enzyme is produced — lactase. It breaks down sugar into two parts — glucose and galactose, which enter the blood.

    The gene responsible for the production of this enzyme is found in almost all peoples who, due to their history, were engaged in cattle breeding and consumed dairy products.

    For example, more than 90% of Dutch, Swedish, and Australian people and more than 50% of Russians drink milk without side effects throughout their lives.

    The people who went without milk - the Japanese, Chinese, Indians, Eskimos-did not develop such a genetic mutation.


    Their digestive system cannot break down milk sugar — it remains in the intestines, where it is "attacked" by bacteria. Because of this, a real "battle" begins, which is accompanied by gas formation, nausea, and diarrhea.


    If you have these symptoms after milk, you can take a special test for lactose intolerance.






    Scientists have found out how long people can drink milk

    It took only three millennia for the rapid spread of the mutation that allows adults to digest lactose.

    The results of the study, conducted by a large international group of biologists and paleogeneticists, are published in the journal Current Biology.

    It has long been known that lactose tolerance (that is, the ability to digest milk sugar, and therefore drink milk) has developed in humanity relatively recently, and this happened due to a genetic mutation.


    This point mutation leads to the fact that the enzyme lactase, which breaks down lactose, the components of which are then absorbed in the small intestine, is present in the digestive tract not only in childhood but also in adulthood.


    At the same time, according to rough estimates, about two-thirds of the adult population of the world remained lactose intolerant - these people do not have the enzyme lactase, milk is not digested and causes diarrhea, abdominal pain, and bloating of the intestines.

    And the maximum percentage of carriers of the mutation that allows drinking milk without problems in adulthood (70-90% of the population) lives in Central and Northern Europe. However, it was still unclear when exactly Europeans developed lactose tolerance.

    Researchers led by Joachim Burger from the University of Johann Gutenberg (Germany) studied genetic material extracted from the bone remains of 14 soldiers who died in the Bronze age, around 1200 BC, during the battle of the Tollensee river in North-Eastern modern Germany.

    Although the battle took place more than four thousand years after the spread of agriculture in Europe and the emergence of the ability to drink the milk of domesticated goats, sheep, and cows, the genetic variant that allows digesting lactose, was present in only 7% of the soldiers.


    Earlier DNA analysis of people who lived in the Bronze age and even earlier times in other regions of Europe also showed a very low percentage of people with a milk-drinking mutation.


    However, when scientists analyzed the genomes of people who lived in northern and central Europe in the Early Middle Ages, less than two thousand years after the Bronze Age, it turned out that more than 60% of the adult population already had lactose tolerance in this era, that is, almost the same number of people, as in modern European countries.

    This means that natural selection for this trait - the ability to digest milk - went with extreme speed, compared with other evolutionary changes in humanity.

    It took only about three millennia for a large enough number of people to develop a tolerance to lactose.

    One of the authors of the study, Krishna Veeramah from Stony Brook University (USA) explains that this is really an incredible rate of change in the gene that controls milk digestion.


    According to calculations, possession of this mutation gave ancestors of a modern European 6% more chances to leave offspring than their contemporary, who did not have such a genetic change.


    Scientists believe that the ability to drink milk in adulthood gave huge evolutionary advantages, as it is a high-calorie drink that provides energy, which allowed people to survive in times of famine.

    Besides, it is a relatively clean liquid that could be drunk in the absence of drinking water or in a situation where water was contaminated.



    Give your brain a little rest - Video of the day: BABY COWS PLAYING LIKE KIDS

      Leave a comment

    UNCONFIGURED AD WIDGET

    Collapse

    Unconfigured Ad Widget

    Collapse

    Unconfigured Ad Widget

    Collapse

    Categories

    Collapse

    Article Tags

    Collapse

    Related Topics

    Collapse

    • Research: Ketones Help With Heart Failure
      by Alan Zalewski



      Ketones are already known to be good for the brain. For example, they help people with Alzheimer's disease.

      There is reason to believe that ketones are also useful directly for the heart - in case of heart failure.





      Ketones for heart failure

      A study of patients with chronic heart failure was published in the journal Circulation of the American Heart Association (AAC).

      Note: Heart failure is the inability
      ...
      09-13-2020, 07:38 AM
    • Why Eskimos are not in ketosis or the Arctic paradox
      by Mike Berger


      Eskimos and peoples of the Far North are undoubtedly adapted to the cold. They are often presented as an example of a keto-adapted people. But this is not quite true.


      C479l or CPT1A queries will give you a large number of links to Pubmed and other resources.

      Eskimos (a notable part of them) have a CPT1A mutation that interferes with the production of ketones.

      There is a noticeable part of the population that has weakened ketogenesis, but with
      ...
      04-28-2020, 08:01 AM
    • Will Eating Broccoli Help You Live Longer? What Science Says
      by Roger Perez



      In this article we will find out how broccoli is useful for suppressing protein glycation, prolonging life, strengthening bones, preventing lung cancer, colon cancer, breast cancer, prostate cancer, pancreatic cancer, stomach cancer, normalizing blood pressure, and lowering cholesterol.

      In my opinion, broccoli is one of the most useful vegetables.

      First of all, we appreciate broccoli for its properties to very strongly inhibit the glycation of proteins
      ...
      10-26-2020, 07:47 AM
    • 10 Main Reasons to Include Butter in Your Diet
      by Barbara Radcliffe




      For several decades, people have been convinced that the use of butter has a negative effect on the condition of the coronary vessels. As a result, the product's reputation has been severely damaged, and many have almost stopped including it in their diet, preferring "safer" vegetable fats.

      Meanwhile, recent studies have shown that the health harm of butter is greatly exaggerated: in fact, it has a number of unique properties that make it essential
      ...
      12-21-2020, 02:08 PM
    • The Keto Diet - Powerful Cancer Treatment? What Science Says
      by Addy Williams
      The Ketogenic (high fat - up to 90% of the calorie intake of fats) diet - a powerful tool for the treatment of malignant tumors.

      Especially for the treatment of malignant brain tumors. Cancer is the second leading cause of death in the United States. Researchers estimate that about 1600 people die a day because due to cancer.

      Cancer is usually treated comprehensively: surgery + radiation + chemotherapy. Many different diets have been studied with the goal of their anti-cancer
      ...
      12-30-2019, 01:14 PM

    Latest Articles

    Collapse

    • The Keto Diet - a Diet for Longevity? What Science Says
      by Deborah Carbine





      For nearly a hundred years, scientists have been researching a method to slow down aging by reducing dietary calorie intake.

      Experiments on a variety of organisms, from yeast to rhesus monkeys, have shown that life expectancy can be increased if energy consumption is reduced by 10–30%.

      The mechanisms of this phenomenon are still under discussion, but it seems that it is based on a shift in metabolic processes from carbohydrate metabolism
      ...
      02-21-2021, 03:17 PM
    • For the First Time, the WHO Recommended Physical Activity for Those Who Sit a Lot
      by Deborah Carbine




      A sedentary lifestyle, compounded by the pandemic's quarantine, increases the likelihood of premature death. However, this harm to health can be compensated for by increased physical activity, experts from the World Health Organization write.

      The advice to lead a more active lifestyle and spend more time on exercise to maintain health is hardly a medical breakthrough, but this is the first time such advice is being made at the level of the World Health Organization.
      ...
      02-21-2021, 09:42 AM
    • Propolis (Bee Glue): Antibacterial, Anti-inflammatory, Antiviral and Antioxidant Properties
      by Deborah Carbine






      Bee glue (PROPOLIS) has been used for medicinal purposes since ancient times. In modern scientific medicine, antioxidant, anti-inflammatory, antibacterial, antiviral, antileishmanial, immuno-modulating, and other properties of propolis have been determined.

      Due to these properties, propolis dosage forms have been successfully used in the treatment of burn wounds, otitis media, Peyronie's disease, lung diseases, viral diseases of the genitourinary
      ...
      02-20-2021, 10:12 PM
    • Emanuel Revici - a 101-year-old Doctor Who Cured Cancer and Other Serious Incurable Diseases
      by Antony Convey


      Emanuel Revici, MD, was born in 1898 and died in 1998 at the age of 101


      Since then, as doctors learned to separate the symptoms of cancer from the manifestations of other diseases, it is perceived as perhaps the most formidable disease for people.

      Although medicine is constantly evolving, and oncology also has its own achievements, the methods of chemotherapy and radiation therapy used in medical institutions do not help everyone.

      Moreover,
      ...
      02-20-2021, 01:13 PM
    • Bowel Movement on Keto: Everything You Need to Know About Defecation When You Are on a Low-Carb, High-Fat Diet
      by Antony Convey










      It is tempting to hide in this text behind jokes like “shit happens” and “princesses don't poop”. But if you ignore the topic of bowel movements, then you can skip serious health problems.

      Let's not be prudes! We suggest learning how to read about the health of the body by color, consistency, and other distinctive features of feces.







      How often do you poop?
      ...
      02-15-2021, 10:31 AM
    • Vitamins for Maintaining Muscle Mass and Muscle Function in the Elderly
      by Antony Convey






      Muscle mass begins to decline after age 30 at a rate of 3% per decade. It seems to be a trifle and at this age is completely invisible. After 50, muscle loss is about 1% of skeletal muscle mass each year and upon reaching the age of 60, this process accelerates significantly.

      Even more annoying, there is less muscle and more fatty tissue. Between the ages of 30 and 60, the average person annually loses 0.5 lbs (0.23 kg) of muscle and instead
      ...
      02-09-2021, 09:30 AM
    • The Main Reasons for Weight Gain and Obesity. How to Start Losing Weight Properly
      by Antony Convey






      How we get used to things that don't work


      We are taught that the main reasons for being overweight are a lot of food and little exercise. And this is not to mention the allegedly weak willpower! But it's not that simple. Because if this mantra worked flawlessly, then there would be no more problem of excess weight, right? After all, everyone who is overweight, at least once, tried to follow this advice!

      Now it is more fashionable
      ...
      02-05-2021, 09:27 AM
    • Top 8 Myths About Immunity
      by Antony Convey





      The very concept of "immunity" was born in the 19th century thanks to the French microbiologist Louis Pasteur and the Russian scientist I. Mechnikov.

      At first, however, immunity was understood as the body's immunity to infectious diseases.

      But already from the middle of the 20th century, as a result of research work, it was proved that immunity protects the body not only from microbes but also from any other genetically foreign
      ...
      02-04-2021, 10:20 AM
    • A History of the Study of Life Extension Products
      by David Glick





      Life extension is a problem of all times and peoples.

      In evolution, this problem appears namely in humans. Realizing the immortality of living nature due to the reproduction of mortal organisms and possessing the instinct of self-preservation and survival, man has always tried to resolve this contradiction between life and death.

      Mankind in all epochs has shown a heightened interest in the means of preserving youth, health, and achieving
      ...
      02-01-2021, 06:04 PM
    • What Fruits Can I Eat on the Keto Diet?
      by Antony Convey



      Let's take a look at the most painful keto question - can we eat fruit on the ketogenic diet?

      On keto, we avoid fruits and allow ourselves a small amount of berries. No keto rule raises so many questions and protests. “Fruits are vitamins! We have eaten them from time immemorial!

      What about antioxidants, flavonoids, and other beneficial substances? Microbiota! What does it eat? " - beginners are lost. “Fruits contain fructose, and fructose
      ...
      02-01-2021, 03:55 PM

    Trending

    Collapse

    There are no results that meet this criteria.

    Working...
    X