How the top US infectious disease specialist strengthens immunity and protects against coronavirus

Most "so-called immune-boosting supplements" actually "do nothing," according to chief US infectious disease specialist Dr. Anthony Fauci. However, there are two vitamins that Fauci recommends to keep your immune system healthy. CNBC.

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“If you don't have enough vitamin D, it affects your susceptibility to infection. So I wouldn’t mind recommending, and I take vitamin D supplements myself,” Fauci, 79, said during an Instagram Live when actress Jennifer Garner asked the doctor about immune-boosting supplements.

Researchers at the University of Chicago Medicine recently found a link between vitamin D deficiency and the likelihood of contracting Covid-19—people with untreated deficiency were more likely to test positive.

“Vitamin D is important for immune system function, and vitamin D supplementation has previously been shown to reduce the risk of viral respiratory tract infections,” David Meltzer, chief of the department of medicine at UChicago Medicine and lead author of the study, said in a press release.

Fauci also said that vitamin C is "a good antioxidant."

“So if you take a maximum of one to two grams of vitamin C, it will be good,” he said.

Vitamin C "promotes immune defenses by supporting various cellular functions" of the body's immune system, according to a 2017 study published by the National Institutes of Health, and vitamin C also appears to prevent and treat "respiratory and systemic infections."

“But I wouldn’t recommend any other mixtures or herbs,” Fauci said.

On the subject: COVID-19 Immunity: Key Questions About Antibodies and Reinfection Risk Answers

During another interview with actress Tiffany Haddish, released Sept. 4, Fauci said that in clinical studies, most "so-called" immune-boosting supplements really didn't help people unless they had some kind of deficiency. In fact, many of these herbs "either don't do anything or, if you take too much of them, they harm you," Fauci said.

“In general, the best way to strengthen your immune system is to get good sleep and exercise,” Fauci said. “This is something that is much better than a bunch of herbs, the effectiveness of which has never been proven,” said the infectious disease specialist.

In March, Fauci, who was a member of the White House task force on Covid-19, said he often worked 20 hours a day while fighting the pandemic. He expressed his gratitude to his 35-year-old wife, Nurse Christina Grady, for reminding her to take care of herself. Grady told CNBC Make It in April that she spent many days trying to get her husband to rest and drink water properly.

Fauci said in the July issue of InStyle Magazine that he also found time to power walk at least 3,5 miles (5,6 km) a day to relieve stress and maintain good health during the pandemic. Fauci, who has been director of the National Institute of Allergy and Infectious Diseases since 1984, used to run up to 7 miles (over 11 km) a day at lunchtime, but switched to power walking because the activity is more gentle on the body.

On the subject: Within a day and for free: how the United States will distribute the vaccine against COVID-19 and who will receive it

Fauci also warned Americans that they must be prepared to "squat" until 2021 because of the coronavirus, because autumn and winter "will not be easy."

According to Worldometers, as of Wednesday evening, September 16, 6 cases of COVID-822 were recorded in the United States, 955 people died. In total, almost 19 million people have been infected with the coronavirus in the world.

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