Lactic acid bacteria can “activate” the body’s immune system

Why is eating yogurt good for human health? A new study in Germany found that a receptor found in human and anthropoid cells can detect metabolites of common bacterial lactic acid bacteria in fermented foods, and when combined, can signal “activate” the immune system.

The results of this research were published in the journal Science Public Library and Genetics. A cell receptor is a protein that allows a specific signal to enter a cell when it is bound to the cell. Most animals have only two HCA receptors, but a third HCA receptor is also present in humans and apes. The researchers found that a metabolite produced by lactic acid bacteria, D-phenyl lactic acid, binds to a third HCA receptor and signals immune cells to trigger immune cell activity.

The study suggests that the third type of HCA receptor first appeared in the common ancestor of humans and apes, and this evolutionary character changed the eating habits of human ancestors, allowing them to start eating fermented foods, such as fruits that have begun to rot.

One of the authors, Claudia Staubert, a researcher at the University of Leipzig in Germany, said that in the future they will further study how the lactic acid bacteria metabolite D-phenyl lactic acid affects the immune system.

Many people think that the nose is not a big problem, but a new study by Michigan State University shows that a sense of smell may help you live longer.

In a 13-year follow-up survey, the researchers studied 2,289 participants aged 71-82 years without health problems. The researchers first asked the participants to identify 12 common odors and scored 0 to 12 based on the number of odors they could identify. It was found that during the subsequent study period, factors such as gender, race, and lifestyle were excluded, and those who had a “slow nose” had a higher mortality rate within 10 years compared with those with higher scores in the olfactory test. 46%, the mortality rate is 62% higher after 10 years.

Researchers say that loss of smell may be an early sign of a worsening health condition, indicating a beginning of physical and mental decline. In addition, people with poor sense of smell are also prone to neurodegenerative diseases (Alzheimer’s disease, Parkinson’s disease, etc.) and cardiovascular diseases. Experts caution that although “the nose is not good” does not directly lead to death, if there is a persistent loss of olfactory function, be vigilant and seek medical attention as soon as possible. At the same time, it is also a good idea to include the olfactory assessment of the elderly in routine physical examinations.

Reasonable diet is one of the prerequisites for health, and the concept of “diversity of food” has gradually gained popularity. Scientists at the National Cancer Research Center of Japan have confirmed that food diversification can reduce the risk of premature death by more than 20%.

To confirm the association between food diversification and risk of death (all deaths, cancer deaths, deaths from circulatory diseases, other deaths, etc.), the research team conducted an average of 14.9 years for 80,000 Japanese residents aged 40-69. Track the investigation. According to the questionnaire, the researchers counted 133 kinds of daily foods and beverages other than alcohol, and divided them into 5 groups according to the number of foods taken by the participants daily. The results showed that the risk of all-cause mortality was reduced by 19%, the risk of death from circulatory diseases was reduced by 34%, and the risk of other deaths was reduced by 24% compared with the group with the lowest daily intake of food. In addition, the more types of fruits ingested by men and the more types of soy products ingested by women, the lower the risk of death; the more meat the male consumes, the higher the risk of death.

The researchers analyzed that compared with women, men have higher alcohol consumption, smoking rates, and more animal protein intake. Therefore, the impact of food diversification on the risk of premature death in men is not as obvious as that of women. Experts suggest that even if you don’t have much theoretical knowledge about food, you can improve your health by paying attention to increasing the type of food you eat and balancing your nutrition.

A new study in the United States has brought good news to the “living people who are not moving well” – even the low-intensity “micro-sports” is good for physical and mental health. This kind of exercise is more than an hour, and the brain Will be younger than 1 year old.

Dr. Nicole Spartano, a researcher at Boston University School of Medicine, and his team conducted a follow-up survey of more than 2,300 male and female participants with an average age of 53 years and no exercise habits. An instrument that monitors the amount of activity. The results showed that people who had low-intensity exercise for one hour a day had a significantly lower risk of heart disease, diabetes, and cancer, and their brains were larger. The long-term persistence of brain aging was delayed by an average of 1.1 years.

Dr. Spartano said that although the 2018 American Sports Guide points out that moderate to high-intensity exercise is most beneficial for at least 150 minutes a week, don’t be discouraged if you can’t do it, because any intensity of exercise is better than no exercise. “Micro-exercise” refers to the mild exercise in which the time is 5 to 10 minutes, standing and doing simple gymnastics. It is also a healthy lifestyle. Perseverance, brain aging will naturally slow down.