Categories Health Topics Immune Support

Immune Support

California Gold Nutrition LactoBif® Probiotics supplement offering proven support for digestive health and immune wellness*, exclusively available at iHerb.
Vitamin D Vitamin C Probiotics Zinc N-Acetyl Cysteine (NAC) Glutathione Immune Formulas Quercetin Selenium Vitamin A Elderberry Sambucus Lysine
3,073 - 3,120 of 3,872 results
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Nature's Truth, L-Lysine, 1,000 mg, 100 Coated Caplets
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Nature's Truth, L-Lysine, 1,000 mg, 100 Coated Caplets
105
57,509USh
Out of stock
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Solaray, Vital Extracts, Andrographis, 60 VegCaps
Solaray, Vital Extracts, Andrographis, 60 VegCaps
32
43,933USh
Out of stock
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Country Life, Target-Mins®, Zinc, 50 mg, 90 Tablets
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Country Life, Target-Mins®, Zinc, 50 mg, 90 Tablets
3,074
37,878USh
Deal
Solaray, Reacta-C®, 500 mg, 120 VegCaps
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Solaray, Reacta-C®, 500 mg, 120 VegCaps
2,480
42,278USh 60,396USh
30% off
57% claimed
Deal
NutriBiotic, Immunity, Hypo-Aller C Vitamin C with Calcium, Magnesium, Potassium & Zinc, 16 oz (454 g)
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NutriBiotic, Immunity, Hypo-Aller C Vitamin C with Calcium, Magnesium, Potassium & Zinc, 16 oz (454 g)
1,375
67,309USh 79,186USh
15% off
Deal
KAL, Dinosaurs®, Immuno-Raptor™, Orange, 60 Chewables
KAL, Dinosaurs®, Immuno-Raptor™, Orange, 60 Chewables
1,035
29,014USh 34,134USh
15% off
Deal
Natural Factors, Vitamin C, Fruit-Flavor Chew, Tangy Orange, 500 mg, 90 Chewable Wafers
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Natural Factors, Vitamin C, Fruit-Flavor Chew, Tangy Orange, 500 mg, 90 Chewable Wafers
1,020
42,126USh 49,560USh
15% off
Nature's Life, Calcium Citrate, Plus Magnesium & Vitamin D, 120 Tablets
Nature's Life, Calcium Citrate, Plus Magnesium & Vitamin D, 120 Tablets
564
42,887USh
MegaFood, Vitamin D3, 25 mcg (1,000 IU), 60 Tablets
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MegaFood, Vitamin D3, 25 mcg (1,000 IU), 60 Tablets
320
Buy One, Get One 80% Off
88,911USh
Deal
Pure Essence, Breast-D™, 30 Vegi-Caps
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Pure Essence, Breast-D™, 30 Vegi-Caps
275
101,753USh 119,709USh
15% off
Deal
Host Defense, Mushrooms™, Cordychi®, 120 Capsules
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Host Defense, Mushrooms™, Cordychi®, 120 Capsules
224
228,779USh
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Innate Response Formulas, Flora 20-14™, Ultra Strength, 60 Capsules
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Innate Response Formulas, Flora 20-14™, Ultra Strength, 60 Capsules
153
187,824USh
Deal
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Nature's Truth, Vitamin C Plus Wild Rose Hips, 1,000 mg, 300 Caplets
146
70,854USh 101,220USh
30% off
Deal
Dragon Herbs, Astragalus, 100 Capsules (450 mg per Capsule)
123
100,550USh 118,293USh
15% off
New Chapter, Kids, Organic Elderberry Whole-Food Gummies, Ages 2+, 30 Vegan Gummies
97
60,784USh
Deal
Sports Research, Elderberry With Vitamin C, Ginger, Zinc & D3, 60 Veggie Capsules
87
76,345USh 109,063USh
30% off
Source Naturals, Wellness, Vitamin D-3, 50 mcg (2,000 IU), 200 Softgels
78
Buy One, Get One 80% Off
48,874USh
Deal
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Nature's Craft, Glutathione, 120 Capsules
79
168,050USh 197,705USh
15% off
Deal
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Nature's Craft, Glutathione, 30 Capsules
79
65,031USh 92,901USh
30% off
Host Defense, Mushrooms, Organic Breathe Extract, 1 fl oz (30 ml)
48
77,173USh
Ancient Nutrition, SBO Probiotics, Vaginal Once Daily, 30 Capsules
44
98,110USh
Deal
YumVs, Strong Earth Gummies, Calcium Magnesium & Vitamin D, Raspberry, 90 Gummies
31
47,515USh 65,992USh
28% off
Deal
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ProBioCare, Women's Probiotics With Prebiotic, 50 Billion, 30 Vegetable Capsules
26
97,562USh 139,374USh
30% off
Oregon's Wild Harvest, Astragalus Reishi, 90 Vegan Capsules
25
95,327USh
Deal
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Snap Dynasty, Cold Snap®, 60 Capsules
19
52,774USh 62,087USh
15% off
New
Futurebiotics, Vitamin A, 3,000 mcg RAE (10,000 IU), 120 Softgels
16
19,105USh
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BIOptimizers, Microbiome Breakthrough, Prebiotics + Probiotics + Postbiotics, Vegetarian Vanilla, 5.29 oz (150 g)
15
201,774USh
Deal
Nutricost, Zinc, 50 mg, 120 Capsules
14
35,760USh 51,085USh
30% off
Advance Physician Formulas, Essential 5™ With Vitamins C, D, & E + Zinc & Selenium, 60 Vegetable Capsules
11
32,066USh
New
Codeage, Probiotic+, 30 Vegetable Capsules
9
121,800USh
Deal
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Manuka Health, Manuka Honey Lozenges, Elderberry, MGO 600+, 20 Lozenges
6
31,300USh 44,714USh
30% off
Tribe Organics, Mushroom Golden Blend, 7.05 oz (200 g)
7
185,757USh
iHerb Brands
California Gold Nutrition, Liquid Multi-Vitamin & Mineral with Calcium, Vitamin B12, Vitamins C & D3 for Children, No Alcohol, Natural Orange Mango, 8 fl oz (237 ml)
2,586
61,180USh
Out of stock
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Protocol for Life Balance, Quercetin with Bromelain, 120 Veg Capsules
51
131,255USh
Out of stock
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Source Naturals, Vitamin D-3, 125 mcg (5,000 IU), 120 Capsules
3,413
39,261USh
Deal
KAL, Dinosaurs®, Vitamin D-Rex™, Watermelon, 15 mcg (600 IU), 120 Micro Tablets
1,839
23,400USh 27,529USh
15% off
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Carlson, Vitamin A, 3,000 mcg RAE (10,000 IU), 250 Soft Gels
708
Buy One, Get One 80% Off
72,234USh
Deal
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Bluebonnet Nutrition, NAC, 500 mg, 30 Vegetable Capsule
518
38,575USh 45,382USh
15% off
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Dr. Mercola, Complete Probiotics SBO, 4 Billion CFU, 90 Capsules
319
339,687USh
Deal
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Trace, Power Pak, Acai Berry, 9.7 oz (275 g)
245
79,914USh 94,016USh
15% off
Deal
Mason Natural, Probiotic with Prebiotic, 40 Veggie Capsules
226
53,889USh 63,398USh
15% off
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Natural Factors, Ultimate Probiotic, Critical Care, 55 Billion CFU, 30 Vegetarian Capsules
141
103,986USh
Deal
Swanson Vitamins, Ultra C Formula, 250 Capsules
108
41,975USh 49,382USh
15% off
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NutriBiotic, Immunity, Amla Vitamin C, 1,000 mg, 30 Vegan Tablets
63
104,203USh
Deal
Swanson Vitamins, Buffered C Powder, Unflavored, 4 oz (113 g)
49
40,048USh 57,211USh
30% off
Flora, Certified Organic Acerola Powder, 1.7 oz (50 g)
49
130,800USh
Deal
Ancient Nutrition, Women's 50+ Once Daily Probiotics, 25 Billion CFU, 30 Capsules
41
91,664USh 130,948USh
30% off
Deal
The Vitamin Shoppe, Probiotic Complex, 4 Billion, 90 Vegetable Capsules
23
48,833USh 69,761USh
30% off
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  • iTested Frequently Asked Questions

    Who is testing the products?

    As of August 2018, iHerb is using 3rd Party Independent Labs ABC Testing, Eurofins and Alkemist to test product. Using a 3rd Party Independent Lab guarantees that the results are objective and unbiased.

    What tests are performed on the products?

    iTested confirms that the information provided on a product Supplement Facts Panel and/or Nutrition Facts Panel is correct. Products are also tested to confirm Clean Label Standards such as a Microbial Analysis and a Heavy Metal Analysis.

    What methods are used to test products?

    The test methods are referenced on each iTested product document.

    How often are products tested?

    Products will be tested every 6 months.

    What Standards are used for iTested?

    iTested consults with a variety of agencies, groups, and governmental panels, Etc. such as: ABC - AHPA - DHSEA - GOED - ISO - UNPA - USP and US FDA

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Fo-Ti (Hé Shǒu Wū): Benefits, Hair Health, Immune Support, and More

Fo-Ti (Hé Shǒu Wū): Benefits, Hair Health, Immune Support, and More

by Dr. Jayne Dabu, DAOM, L.Ac.
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4 Homeopathic Remedies for Immune Support
EVIDENCE BASED

4 Homeopathic Remedies for Immune Support

by Dr. Laurie Steelsmith, N.D.
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Why Quercetin Is an Easy Choice for Antioxidant and Immune Support

Why Quercetin Is an Easy Choice for Antioxidant and Immune Support

by Dr. Michael Murray, N.D.
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The Best 12 Superfoods To Support Immune Health

The Best 12 Superfoods To Support Immune Health

by Dr. Josh Axe, DNM, DC, CNS
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Immune System Support: The Top 10 Natural Supplements to Optimize Health

Immune System Support: The Top 10 Natural Supplements to Optimize Health

by Dr. Eric Madrid, M.D.
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Do's and Don'ts: How To Support Your Immune System Via Your Gut

Do's and Don'ts: How To Support Your Immune System Via Your Gut

by Dr. Josh Axe, DNM, DC, CNS