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Nutritional Support for Your Immune System

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The best defense when it comes to protecting our health is a good offense, so physical distancing and rigorous handwashing remain the critical first steps in defending against the COVID-19 virus. At the same time, you want your body to have the resources it needs to marshal its best immune response in an encounter with any virus. One of the key ways to build your immunity is to be well nourished: A strong nutritional baseline can help your body ward off illness — and can make your body more capable of recovery if you do get sick.

We surveyed some integrative-health experts to learn which vitamins, minerals, and foods they’re suggesting to optimize health and nutrition during the COVID-19 outbreak. These are the top five they recommend.

Vitamin C

“We can’t make our own vitamin C, [and] when we get sick, vitamin C needs to increase,” explains functional-medicine physician Terry Wahls, MD. She adds that nutritional biochemist Linus Pauling, PhD, became known for his work on the effect of vitamin C on shortening colds, and the cold is also caused by a type of coronavirus.

All the practitioners we surveyed recommended increasing daily intake of vitamin C with food and supplements. Good food sources of vitamin C include citrus fruits and brightly colored vegetables. Sauerkraut is another good source, advises Wahls, and it offers the additional benefit of supporting your gut microbiome. To supplement with vitamin C, these experts recommend anywhere between 250 mg and 1,000 mg a day. (If you get loose stools, back off a bit.)

Vitamin D

Sometimes known as the “sunshine vitamin,” vitamin D plays a critical role in immune function. Experts have even speculated that one reason we’re more vulnerable to illness in winter is that our vitamin D levels drop from lack of sunlight.

Because many of us are spending more time indoors now, and immunity is a central concern, it’s even more critical to ensure adequate vitamin D levels. Good food sources of vitamin D include salmon and tuna (including canned tuna) as well as egg yolks, especially from pastured eggs.

If you’re not presently symptomatic (see note below), supplementing can also be a supportive choice. “Studies have shown that supplementing with vitamin D can reduce colds and flu by 42 percent,” notes functional-medicine physician Mark Hyman, MD.

Wahls and Kara Parker, MD, a functional-medicine family physician, both advise adding a vitamin D3 supplement to ensure your body has an optimal level. Parker suggests at least 2,000 IU daily for adults and up to 5,000 IUs. Hyman recommends starting children at 1,000 IU.

The panel of integrative physicians strongly cautioned against supplementing with immune-activating agents like vitamin D if you develop COVID-19 symptoms. This sounds counterintuitive, but during advanced stages of viral infection the immune system can begin to attack the body’s organs — what’s called a “cytokine storm” — and vitamin D can activate the release of a cytokine protein. The panel also recommends avoiding the herbal remedies elderberry and echinacea if you get sick, for the same reason.

Vitamin A

Integrative physician Robert Rountree, MD, recommends vitamin A to support lung health, because it’s a critical nutrient for building and repairing lung tissue. Most of us can get enough from brightly colored vegetables and fruits, he says, but he recommends supplementation for anyone with lung issues.

Parker recommends everyone supplement with vitamin A right now because “it helps protect your respiratory hair cells, called cilia, that the coronavirus infects.” She suggests taking 10,000 IU daily for one week, then once or twice a week to maintain your stores. (Be careful not to oversupplement, as hypervitaminosis can occur at high levels with this vitamin.)

Zinc

This mineral is another potent immune supporter. A recent panel of integrative physicians, including Andrew Weil, MD, of the Andrew Weil Center for Integrative Medicine, has noted that “coronavirus appears to be susceptible to the viral inhibitory actions of zinc.” They’re careful to emphasize that this is a potential risk-reduction measure — not a cure — and suggest that supplementing with zinc lozenges so that you’re getting 15–30 mg a day may help protect the upper respiratory tract.

Parker and Hyman also both recommend making sure you have optimal zinc at this time. Hyman notes that oysters, red meat, and pumpkinseeds are all excellent zinc sources. Parker suggests getting 20 mg daily, taken apart from vitamin A for best absorption.

Garlic

Garlic is a powerful antimicrobial and antiviral, and studies have found that fresh garlic extract has strong inhibitory effects even on antibiotic-resistant bacteria like MRSA. Wahls suggests consuming extra garlic to support immunity because it helps boost natural killer immune cells.

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Health & Fitness

PUMPING IRONY: Not the Retiring Type

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One of the few prescient insights I can recall from my wayward postcollege days was the notion that a full retirement would surely elude my grasp. Social Security was certain to go bankrupt at some point, I figured, and even if it survived, the paltry income I’d earn as a freelance writer and editor would hardly translate into a monthly government check that would allow much in the way of work-free leisure in my dotage. Better to just grind away in scarcity mode, keep expenses to a minimum, and narrow my horizons. As Thoreau put it, “Simplify, simplify, simplify.”

The intervening 40-odd years have proven that life is complicated. I married, children appeared along with mortgages, car payments, and other financial realities. And, while I eventually began to earn a living wage at a succession of fragile publications, we struggled to put money away for the future. It was only after securing my current position several years ago that My Lovely Wife and I were able to begin building some long-term savings. But, like most of our peers, we’ve invested too little, too late to ensure that at some future date we’ll be able to pay the bills without a steady paycheck.

About 45 percent of our boomer compatriots have no retirement savings, according to a 2019 survey by the Insured Retirement Institute, and Social Security offers scant financial comfort: The average monthly check is only about $1,500. The future is notably brighter for the 31 percent of retirees who receive a monthly pension from their former employers, but that cohort has been shrinking since 1982, when Congress amended federal tax laws to offer fewer incentives for companies to maintain defined benefit plans.

“We’ve probably peaked in terms of retirement security — and it’s not great,” Monique Morrissey of the Economic Policy Institute tells reporter Will Englund in the Washington Post. “And now it’s all downhill. Unless something changes, we’re going to start seeing much more hardship.”

So, I was intrigued by a recent study from Georgetown University’s Center for Retirement Initiatives (CRI) describing the benefits of broadening access to retirement savings accounts for employees at all stages in their working lives. Currently, companies employing some 40 percent of the nation’s private-sector workers — 57.3 million people — offer no way to save. Mandating such options, while exempting small firms and making employer financial contributions voluntary rather than mandatory, would help individuals build their retirement savings over the long term. One model suggests that as many as 40 million more workers would have accumulated retirement funds by 2040 if these accounts were made widely available.

“Addressing the retirement savings crisis can be done in a simple, cost-effective way using private-sector solutions paired with a national requirement for employers to provide options to their employees,” says CRI executive director Angela Antonelli. “Millions of American workers would benefit from universal access to Auto-IRAs, 401(k)s, or other savings arrangements.”

Those benefits would also accrue to the overall economy, Antonelli argues, by adding up to $96 million to the nation’s gross national product by 2040 and reducing federal and state financial assistance to cash-strapped retirees by some $8.7 billion. Ten states have already passed legislation requiring companies to provide these options, she notes, offering ample evidence of its salutary effects. “Our research shows how expanding universal access to the national level can make a profound difference in individual lives and the broader economy in a relatively short period of time.”

I can’t help but applaud Antonelli’s optimistic view, though it’s hard to imagine how folks toiling away for minimum wage at some fast-food joint would find enough surplus in their monthly income to sock anything away in a 401(k). If I’ve learned anything from 50-odd years in the workforce, it’s how hard it is to adhere to a budget — much less save for a rainy day — when the checks barely cover the rent and groceries.

Besides, work isn’t always about the money. My ancient résumé is littered with jobs I sought because they offered a fresh occupational challenge or the opportunity to contribute to some broader social mission. Long-term financial planning was never a primary consideration. As struggling boomer retiree Terry Koch, 69, explains in Englund’s Post feature, for many of our generation it was more about enjoyment than anything else.

“We were a people who said we kind of like to have job satisfaction up front,” he says. “And so we didn’t think about the long run of things. To not be thinking about the future, to be more of a Zen thing. . . . And it wasn’t pure hedonism. There was some purity. And we’re still very much that way. I would rather be happy today than miserable 25 years from now. And so I made choices based on that rather than on the economics, which, you know, one could argue fairly successfully that I made some pretty stupid decisions.”

Forced out of the job market by health issues, Koch and his 70-year-old wife, Nancy, live in a rent-subsidized apartment in West Allis, Wis., and subsist on about $2,500 in monthly Social Security income. About $1,500 of that goes for rent and Medicare supplemental insurance coverage. There’s no savings. Yet, they soldier on more enthusiastically than you might imagine. “You know,” Nancy says, “neither of us thought we’d be alive at this age.”

It’s a sentiment that crosses my mind more than occasionally these days, and it often reminds me of my immense good fortune. A leisurely retirement may not await me in the years ahead, but just knowing I’ve made it through another day sometimes feels like money in the bank.


Craig Cox
is an Experience Life deputy editor who explores the joys and challenges of aging well.

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