As new variants of COVID emerge---and as The Centers for Disease Control admits that vaccinations don't guarantee protection---the importance of maintaining an optimal immune system is more critical than ever. Fortunately a number of studies have examined which nutrients specifically help in tha COVID battle---and many of these studies have been published during the past year. In this article we will provide a list of these key nutrients, along with links to the supporting research. We'll also provide a list of the related OHS products. Use this information to start improving your own immune system, or to further your own research!Of all immune-building nutrients, research on Vitamin D has been most prolific during the COVID pandemic. Studies in the U.S. found people with higher Vitamin D levels are less likely to contract COVID, and more likely to survive it if they do contract it. Meanwhile, Spanish research found 80% of COVID patients were low on Vitamin D, while a French study found elderly patients were more likely to survive COVID if they're taking a Vitamin D supplement. Read all the Vitamin D studies we've covered here.Vitamin D Products • Exposure Protection Pak • Essential DAK1K2 • Optimal Longevi-D • Opti-Immune-VRLNutrition experts say, "Most of your immune system originates from the gut"---and relative to COVID the research appears to coroborate this. A study from Mexico City found probiotic supplementing lowered the remission rates of COVID patients. Meanwhile, a study from Hong Kong found the quality of each patient's gut bacteria affected how severely the disease affected them. Probiotic Products • Exposure Protection Pak • Optimal Flora Plus • Flora Blitz 100 • Optimal DefenseA study from the Netherlands found that COVID-19 patients who have low Vitamin K status tend to have worse outcomes. Meanwhile, in New Zealand, early research from April 2020 found such a high rate of Vitamin K deficiency among COVID patients that they followed-up in 2021 with a hypothesis study. Read about both of those two studies here.Vitamin K Products • Exposure Protection Pak • Essential DAK1K2 • Optimal Longevi-D K2 • DNE Pak"DMB" is an accronym for the immune nutrients Vitamin D, Magnesium and Vitamin B12. Vitamin D has been covered extensively in other studies; however, medical researchers from Singapore General Hospital found that a combination of the three nutrients given via supplements reduced the progression of COVID-19 into the severe or fatal stages. Read the research here."DMB" Products • Exposure Protection Pak • Whole Food Vitamin/Mineral • DNE PakIn the U.S. there is little mention of Vitamin C in the battle against COVID---out of fear of running afoul of government guidelines. In Asian countries, however, there is "expert consensus" in using high doses of intravenous Vitamin C for treatment. In addition, health practitioners are free to recommend Vitamin C supplementing for prevention without breaking the law. Read details here.Vitamin C Products • Exposure Protection Pak • Optimal Whole C • Opti-Pak • Fruit & Veggie PlusIn late 2020 scientists in Sweden conducted an in vitro study providing the first evidence that nitric oxide prevents replication of the SARS-CoV-2 virus that causes COVID-19. Researchers were so impressed with their findings they wrote, “To our knowledge, nitric oxide is the only substance shown so far to have a direct effect on SARS-CoV-2.”Nitric Oxide - Boosting Products • Exposure Protection Pak • Optimal Opti-Nitric • Optimal B.F.F. • NOS Performance PakIf you're overweight one powerful "nutrient" you can provide your body is weight loss. Excess weight was observed to be a risk factor from the beginning of COVID. Then a more specific meta-analysis, published August 2020, found that obese people who contracted COVID-19 were 113% more likely to be hospitalized. Meanwhile, a report published February 2021 found countries with higher overweight populations had higher COVID deaths. Details here. Weight Loss Products. • Optimal Fat•Sugar•Trim • LipoLean CLA • 21-Day Blitz Challenge PackageIn April 2020 the British Medical Journal published a study entitled Nutrition, Immunity and COVID-19. In this study the researchers recommended the following nutrients: Vitamin A, all B vitamins, Vitamin C, Vitamin D, Vitamin E, Zinc, Copper, Selenium, Iron and probiotics. The Centers for Disease Control in the U.S. publishes a similar list of nutrients for immune support. Included in this is protection from viruses; however, they do not mention the "COVID-19" virus specifically.Multi-Vitamin/Mineral Products • Exposure Protection Pak • Whole Food Vitamin/Mineral • Natural Z Pak • DNE Pak