Collection: Immune Support*

If you’re looking to support your body’s normal immune response – whether you’re feeling fine and want to stay that way, or you need to feel better quickly – trust Natural Factors’ products. Many supplements are formulated with our clinically proven ECHINAMIDE® echinacea, the result of many years of extensive research. We offer a range of single and combination formulas to help support healthy immune function, respiratory health, and nasal and throat health.* 

65 products

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65 products

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Sale

Active Support Syrup

Provides immune and respiratory support*
Regular price $17.96
Sale price $17.96 Regular price $23.95
Sale

Anti-V Formula Liquid

Provides immune system support*
Regular price From $11.96
Sale price From $11.96 Regular price $15.95
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Sale

Anti-V Formula Softgels

Provides immune system support*
Regular price From $14.96
Sale price From $14.96 Regular price $19.95
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Sale

Astaxanthin Plus

Provides powerful cell protection*
Regular price $18.71
Sale price $18.71 Regular price $24.95
Sale

Bee Propolis Extract

Helps soothe the throat and freshen the breath*
Regular price $14.96
Sale price $14.96 Regular price $19.95
Sale

Bee Propolis Throat Spray

Helps soothe the throat and freshen the breath*
Regular price $11.96
Sale price $11.96 Regular price $15.95
Sale

Bioactive Quercetin EMIQ

Supports healthy sinus and immune system function*
Regular price $25.46
Sale price $25.46 Regular price $33.95
Sale

C Extra + Quercetin Bioflavonoids

Immune support*
Regular price $14.96
Sale price $14.96 Regular price $19.95
Sale

Citrus Bioflavonoids plus Hesperidin

Provides bioflavonoids*
Regular price $11.96
Sale price $11.96 Regular price $15.95
Sale

Echinamide® Softgels

Supports immune health*
Regular price $11.21
Sale price $11.21 Regular price $14.95
Sale

Fresh Herb Extract

Supports immune health*
Regular price $11.96
Sale price $11.96 Regular price $15.95
Restocking soon

GarlicRich® Garlic + Reishi

Supports immune and cardiovascular health*
Regular price $11.96
Sale price $11.96 Regular price $15.95
Sale

L-Arginine Amino Acid 1000 mg Tablets

Supports cardiovascular health*
Regular price $17.96
Sale price $17.96 Regular price $23.95
Sale

L-Arginine Amino Acid 500 mg Vegetarian Capsules

Supports cardiovascular health*
Regular price From $10.46
Sale price From $10.46 Regular price $13.95
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Sale

L-Lysine Amino Acid

Supports a healthy immune system*
Regular price From $9.71
Sale price From $9.71 Regular price $12.95
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Sale

Liposomal Vitamin C 1000mg

Provides enhanced vitamin C absorption
Regular price $14.96
Sale price $14.96 Regular price $19.95
Restocking soon

Lung, Bronchial & Sinus Health

Nourishes the entire respiratory system!*
Regular price From $12.71
Sale price From $12.71 Regular price $16.95
Sale

Micronized L-Glutamine Amino Acid 1,000 mg

Support for muscle tissue and the immune system*
Regular price From $14.21
Sale price From $14.21 Regular price $18.95
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Sale

Micronized L-Glutamine Amino Acid 5,000 mg Powder

Support for muscle tissue and the immune system*
Regular price From $18.71
Sale price From $18.71 Regular price $24.95
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Sale

Micronized L-Glutamine Amino Acid 500 mg

Support for muscle tissue and the immune system*
Regular price $11.21
Sale price $11.21 Regular price $14.95
Sale

N-Acetyl-L-Cysteine Amino Acid 500 mg

Supports healthy liver and lung function*
Regular price $14.96
Sale price $14.96 Regular price $19.95
Sale

N-Acetyl-L-Cysteine Amino Acid 600 mg

Supports healthy liver and lung function*
Regular price $11.96
Sale price $11.96 Regular price $15.95
Sale

Oil of Oregano 180 mg Softgels

Provides antioxidants for the maintenance of good health*
Regular price From $9.71
Sale price From $9.71 Regular price $12.95
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Sale

Oil of Oregano Liquid

Provides antioxidants for the maintenance of good health*
Regular price From $14.99
Sale price From $14.99 Regular price $19.99
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Sale

Olive Leaf Extract

Provides natural support for the body’s defense system*
Regular price From $10.46
Sale price From $10.46 Regular price $13.95
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Sale

Quercetin

Supports healthy sinus and immune system function*
Regular price $20.96
Sale price $20.96 Regular price $27.95
Sale

Quercetin LipoMicel Matrix

Supports healthy sinus and immune system function*
Regular price From $20.96
Sale price From $20.96 Regular price $27.95
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Sale

Quercetin with Zinc & Copper

Supports immune function*
Regular price $24.71
Sale price $24.71 Regular price $32.95
Restocking soon

Quick-Blast

Provides soothing support in one bite!*
Regular price $8.96
Sale price $8.96 Regular price $11.95
Sale

Rutin

Promotes healthy veins, arteries, and capillaries*
Regular price $12.71
Sale price $12.71 Regular price $16.95
Sale

Sambucus Black Elderberry Standardized Extract

Provides immune and respiratory support*
Regular price From $10.46
Sale price From $10.46 Regular price $13.95
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Sale

SelenoExcell® Selenium

Provides antioxidant and immune support*
Regular price $10.46
Sale price $10.46 Regular price $13.95
Sale

Super Mushroom

Provides immune and energy support*
Regular price From $25.46
Sale price From $25.46 Regular price $33.95
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Restocking soon

Throat Spray Formula

Soothes the throat and freshens the breath*
Regular price $12.71
Sale price $12.71 Regular price $16.95
Sale

Vegan Bioenhanced Vitamin D3 125 mcg (5,000 IU)

Helps maintain a healthy immune system*
Regular price $23.96
Sale price $23.96 Regular price $31.95
Sale

Vegan Bioenhanced Vitamin D3 25 mcg (1,000 IU)

Helps maintain a healthy immune system*
Regular price $16.46
Sale price $16.46 Regular price $21.95
Sale

Vegan Vitamin D3 50 mcg (2,000 IU)

Supports healthy bones*
Regular price $20.96
Sale price $20.96 Regular price $27.95
Sale

Vitamin C 500 mg 100% Fruit Chew Berry

Supports healthy bones, cartilage, teeth, and gums*
Regular price From $12.71
Sale price From $12.71 Regular price $16.95
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Sale

Vitamin C 500 mg 100% Fruit Chew Mixed Fruit Flavors

Supports healthy bones, cartilage, teeth, and gums*
Regular price From $12.71
Sale price From $12.71 Regular price $16.95
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Sale

Vitamin C 500 mg 100% Fruit Chew Orange

Supports healthy bones, cartilage, teeth, and gums*
Regular price From $12.71
Sale price From $12.71 Regular price $16.95
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Sale

Vitamin C 500 mg 100% Fruit Chew Peach

Supports healthy bones, cartilage, teeth, and gums*
Regular price From $12.71
Sale price From $12.71 Regular price $16.95
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Sale

Vitamin C 500 mg 100% Fruit Chew Tropical

Supports healthy bones, cartilage, teeth, and gums*
Regular price From $12.71
Sale price From $12.71 Regular price $16.95
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Sale

Vitamin C BioCgel™ with BerryRich®

High-absorption ascorbate C with bioflavonoids*
Regular price $14.96
Sale price $14.96 Regular price $19.95
Sale

Vitamin C Non-Time Release 1,000 mg

Supports healthy bones, cartilage, teeth, and gums*
Regular price $9.71
Sale price $9.71 Regular price $12.95
Sale

Vitamin C Time Release 1,000 mg

Supports healthy bones, cartilage, teeth, and gums*
Regular price From $10.46
Sale price From $10.46 Regular price $13.95
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Sale

Vitamin C with Bioflavonoids & Rosehips 500 mg

Supports healthy bones, cartilage, teeth, and gums*
Regular price $8.21
Sale price $8.21 Regular price $10.95
Sale

Vitamin D3 10 mcg (400 IU) Chewable Tablets

Provides essential support for strong bones and teeth*
Regular price $11.96
Sale price $11.96 Regular price $15.95
Sale

Vitamin D3 125 mcg (5,000 IU)

Supports healthy bones*
Regular price From $11.21
Sale price From $11.21 Regular price $14.95
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Sale

Vitamin D3 25 mcg (1,000 IU)

Supports healthy bones*
Regular price $8.21
Sale price $8.21 Regular price $10.95