The Best Foods and Supplements to Boost Your Immune System

Last updated: 04-03-2020

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The Best Foods and Supplements to Boost Your Immune System

I’m frequently asked this question and it’s a good one.

I’m going to answer it in a couple of different ways:

Vitamin C – a powerful immune booster known to increase the number of natural killer cells in circulation. Vitamin C is a known anti-viral, and low levels of vitamin C are linked to increased risk of infection.

An interesting study of those hospitalized with respiratory disease showed a decreased mortality rate of 80% with moderate amounts of vitamin C.

How much vitamin C do you need? Take the C bowel tolerance test here.

Vitamin D – a strong anti-viral, vitamin D3 is known to decrease risk of infection when you have a normal level (about 50 ug/mL). Most Americans are deficient; check your most recent blood test to see what your levels are. Note: it’s important to combine D3 with vitamin K2 to ensure you don’t deposit calcium inappropriate in your body. In addition to immune defense, vitamin D3 helps you to absorb calcium. Vitamin K2 ensure the calcium is directed where it needs to go, your bones.

Vitamin A – acts as a natural anti-inflammatory, assisting specifically in mucus membrane health of the sinuses and lungs.

Zinc – a mineral with known anti-viral properties. It’s non-optimal in many Americans.

Melatonin – your sleep hormone, well known to boost immune function from cancer-fighting to bacteria and viral defense. Melatonin decreases with age putting you at increased risk of not just infection but loss of cognitive protection. Interestingly in Wuhan China where COVID-19 began, pregnant mothers in their 3rd trimester and children seemed to be almost immune to the virus. They have since made an association with the robust melatonin levels in both those groups.

To see more in depth information on melatonin’s association with COVID-19, read this blog 

Nitric oxide – is produced in your nasal passages and appears to be part of the defense system we have against bacterial and viral infections. can be supplemented, but is also available in healthy foods. Along with melatonin and vitamin C,

Newborns, in Wuhan China were found to be mostly immune to COVID-19. It couldn’t be their melatonin level, which is extremely low in newborns until about 4 months of age.

Infants due produce high levels of nitric oxide however, despite their “barely developed” paranasal sinuses. Mother Nature is so smart!

I found it fascinating that newborns have levels of nitric oxide matching those found in healthy adults.

There are supplements of beet powder to raise your nitric oxide levels, but I’ve also noted in italics below, the foods highest in it. Not surprisingly, the healthiest foods contain high nitric oxide levels.

This list changes a bit year to year so I wanted to present you with the 2020 data.

The “Clean 15” have the lowest concentrations of pesticide contamination, therefore making them safe to eat even when they’re not organic.

Here’s the list: I’ve placed in BOLD some of the healthiest choices. I’ve placed in italics, those with the highest amount of nitric oxide.

This list also changes a bit year to year; below is the current 2020 data.

The “Dirty Dozen” have the highest concentrations of pesticide contamination. You should NOT eat them if you cannot find them in an organic form.

Here’s the list: I’ve placed in BOLD some of the healthiest choices

Kale made the list, for the first time in 2019. It’s been found to be contaminated with Dacthal, something the EPA considers a possible carcinogen. It’s been linked to damage of the lung, thyroid, liver and kidney.

It’s a “superfood”, but only if it’s organic please.

Americans love their fruit and we want it all the time, forget the season. Pesticides can keep things growing even if Mother Nature hadn’t intended it.

Strawberries are a great example of this. Demand is high and we satisfy demand with poisonous gases being sprayed on to strawberry fields.

We also love apples. The pesticide diphenylamine is banned by the European Union, but considered “safe” here. Does your child love apple sauce? Please go with the organic version as over 1/3 of the non-organic samples tested contain the pesticide.

A robust study of close to 70,000 participants, tracked individuals in France who primarily consumed organic food.

Their cancer rate was 25% less than those who did not eat organic food. Yes, there could have been other factors at work, but it’s worth noting the correlation.

Frankly, the next issue has me even more concerned.

Pesticides are known endocrine disruptors. We see this a great deal in our patients.

We see more hormonal imbalance and fertility issues these days than ever before.

At times of stress we tend to crave all the wrong foods and that’s the last think you want when trying to boost your immune system.

Let’s just keep it simple:

If you need help with ideas, reach out.

This website has hundreds of recipes to give you ideas.

We are here for you to assist you in any way we can to improve your health.

What is your biggest health problem?

We have the tools to discover why you’re having trouble. It’s not difficult as long as you’re ready to make some dietary and lifestyle changes. If that sounds daunting, don’t worry. We will hold your hand through the changes and make each step of change an easy one.

If you are not local to us you can still receive help. It is the reason we created our Destination Clinic that treats patients from across the country and internationally.

We help the world’s busiest people regain, retain and reclaim their health, energy and resilience.

If you liked this blog please share it with friends and family.

To reclaiming your best health,

Dr. Vikki Petersen DC, CCN Certified Functional Medicine Practitioner Founder of Root Cause Medical Clinic Author of “The Gluten Effect” Author of the e-Books: 

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