Invested in supporting your daily immunity, mbg created immune support+. In this breakthrough immune complex, you'll find the leading plant phytonutrient duo quercetin phytosome and Wellmune® beta-glucan for immune resilience and strength. These two powerhouse bioactives are supported by a foundational trio of immune-essential micronutrients vitamin C, vitamin D3, and zinc bisglycinate, to combat oxidative stress and support your immune cells' many critical daily functions. mbg's curated five-in-one approach is delivered in just one serving per day, with a clean formula that's GMO-free, gluten-free, dairy-free, and soy-free. This is your proactive, daily immune support solution. Our immune systems don't take a day off, so why should we?*

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In analyzing this multi-ingredient immune supplement by Metagenics, a pattern quickly emerges: antioxidants. N-acetylcysteine (NAC) and green tea extract (decaf) featuring catechins and EGCG headline for this formula, with quercetin, vitamin C, and zinc bringing up the rear. NAC is required to make glutathione (a major antioxidant) in the body, and collectively this antioxidant-heavy formula (that's GMO-free and gluten-free) supports the body's own endogenous detoxification processes, combats free radicals, and reduces oxidative stress to support the immune system and its functions. The clinical science for green tea extract and immunity still has some ripening to do, but this ingredient delivers antioxidant power nonetheless.*

This innovative product from Jeffrey Bland, Ph.D., the "Father of Functional Medicine" and mbg Collective member, is an immune supplement from Big Bold Health that supports rejuvenation of the immune response. This product brings an ancient grain, tartary buckwheat (the Himalayan variety, specifically), back to the forefront. This vintage grain is rich in flavonoids and other phytochemicals and bioactives (quercetin, hesperidin, luteolin, rutin, chlorophyllin, and 2-HOBA) specific to the buckwheat plant—a proprietary portfolio of phytonutrients, if you will. You also get a small amount (16 milligrams) of vitamin C. I don't generally love the nebulous blends, but the formula is unique and high quality (GMO-free, dairy-free, gluten-free, and vegetarian).*

This fizzy drink mix by Nature Made is an immune-centric supplement you add to a beverage. Its orange flavor is naturally derived, and the orange color comes from natural ingredient sources, too (turmeric and vegetable juice). Along with a potent dose (2,000 mg) of vitamin C, there's 1,000 IU of vitamin D3, 20 mg of zinc ascorbate, seven B vitamins (to support cellular energy metabolism), manganese, and key electrolytes too (sodium, potassium, and magnesium). This seems like a more occasional, situational play that's good to have up your sleeve. FYI, one stick pack is 30 calories (OK), but this is all from seven grams of total carbs, 6 grams of which are added sugars (fructose). If your health situation involves care with sugar intake, a capsule-based immune supplement might be a better strategy.*

Considering 70% of your immune system resides in your gut, probiotics are a valuable immunity tool, too. This particular probiotic by Nature's Bounty features 10 unique strains to support healthy immune function and upper-respiratory health. The total live-culture colony-forming units (CFU) count is 20 billion, which is spread across 10 unique strains. I like that this supplement is GMO-free, dairy-free, gluten-free, and vegetarian.*

For this immune supplement, MegaFood recommends consumers take two tablets three times a day for five days when you need more intensely focused immune care and support. In their words, "when you need it most." If you take this product at their recommended frequency, you'd be getting 750 mg of vitamin C a day, 15 mg of zinc bisglycinate daily, and potent doses of three botanicals (elderberry, echinacea, and andrographis extracts), too. This vegan supplement is also GMO-free, gluten-free, dairy-free, soy-free, and kosher. However, in my opinion, excluding vitamin D3 in an intensive immune formula seems like a miss. And while designed for short-term use, it does require some dedication (three times a day).*

This unique, botanical-heavy formula combines vitamin D3, turmeric phytosome, broccoli sprout concentrate, resveratrol from Japanese knotweed, black ginger extract, and quercetin. Per Pure Encapsulations, this GMO-free and gluten-free formula provides, "foundational support for healthy cellular response, antioxidant status, and cytokine balance." However, they don't use quercetin in the phytosome form (i.e., better absorption in the body). I'll point out that the vitamin D3 is sourced from lanolin (derived from shearing sheep's wool), which is a good source and may be vegetarian (as the website states), but it's certainly not vegan.*

This immune syrup by Garden of Life is designed for immune support in children four years and older (obviously with adult supervision). It features three organic botanicals: mostly black elderberry fruit extract, less acerola cherry fruit extract, and a tiny bit (10 milligrams) of aronia berry. These fruits yield 10 mg of vitamin C, which sounds trivial, but the Recommended Dietary Allowance (RDA) for vitamin C is 25 mg per day for children ages four to eight years and 45 mg a day for children ages nine to 13 years. So, 10 milligrams is useful, particularly if they're getting more vitamin C in a multivitamin. I applaud the "other ingredients'' list, which is clean and creative. Along with being GMO-free, gluten-free, dairy-free, and soy-free, this syrup is certified USDA organic, sugar-free, and vegetarian. Refrigerate after opening, and pay attention to the expiry.*

This naturally orange-flavored liquid syrup supplement from Zarbee's Naturals is immune-focused and designed for babies starting at two to 11 months old and toddlers ages one to three years. The dosing instructions are different per age group. Immune-centric micronutrients featured include vitamins A, C, D3, and E, plus zinc. This supplement is designed for one serving per day but not intended for extended use. The vitamin C dosing is higher than the RDA, but well within the safe upper limit for vitamin C in this age group (400 milligrams). This gluten-free syrup provides 10 to 15 calories per serving and three to four grams of carbohydrate from the organic agave syrup. It's free of dyes and artificial flavors, and a syringe is included to help dispense the correct dosage. Note: This syrup can be stored at room temperature.*