Immune Support

If you’re looking to support your body’s 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 support healthy immune function and respiratory health, relieve nasal congestion, and soothe sore throats.

 

 

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L-Lysine 1000 mg, Natural Factors|v|image|2859

L-lysine Amino Acid 1000 mg

Helps reduce recurrence, severity, and healing time of cold sores
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L-Lysine 500 mg, Natural Factors|v|image|2823

L-Lysine Amino Acid 500 mg

Helps reduce recurrence, severity, and healing time of cold sores
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Liposomal Vitamin C, Natural Factors|v|image|1319

Liposomal Vitamin C

Provides advanced vitamin C absorption
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Lung, Bronchial & Sinus Health, HerbalFactors, Natural Factors|v|image|3504

Lung, Bronchial & Sinus Health, HerbalFactors

Helps relieve sinus, respiratory, and cough discomfort
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Mega Halibut Liver Oil, Natural Factors|v|image|1011

Mega Halibut Liver Oil

Promotes healing and helps boost the immune system
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Micronized L-Glutamine 1000 mg, Natural Factors|v|image|2857

Micronized L-Glutamine Amino Acid 1000 mg

Enhances muscle recovery, energy, and immunity
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Micronized L-Glutamine 5 g, Natural Factors|v|image|2804

Micronized L-Glutamine Amino Acid 5 g Powder

Accelerates recovery and energy, and supports muscle growth
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Micronized L-Glutamine 500 mg, Natural Factors|v|image|2820

Micronized L-Glutamine Amino Acid 500 mg

Enhances muscle recovery, energy, and immunity
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N-Acetyl-L-Cysteine 1000 mg, Natural Factors|v|image|2865

N-Acetyl-L-Cysteine Amino Acid 1000 mg

Protects against free radical damage
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N-Acetyl-L-Cysteine 500 mg, Natural Factors|v|image|2815

N-Acetyl-L-Cysteine Amino Acid 500 mg

Protects against free radical damage
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N-Acetyl-L-Cysteine 600 mg, Natural Factors|v|image|8003

N-Acetyl-L-Cysteine Amino Acid 600 mg

Protects against free radical damage
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Oil of Oregano 180 mg, Natural Factors|v|image|4574

Oil of Oregano 180 mg Softgels

Provides antimicrobial properties
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Organic Oil of Oregano, Natural Factors|v|image|4571

Oil of Oregano Liquid

Provides antimicrobial properties
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Olive Leaf 500 mg, HerbalFactors, Natural Factors|v|image|4570

Olive Leaf 500 mg, HerbalFactors

Exerts powerful antiviral activity
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Quercetin with Zinc & Copper 500 mg, Natural Factors|v|image|1390

Quercetin with Zinc & Copper 500 mg

Specially formulated plant-enhanced immune support
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Quick-Blast, ECHINAMIDE, Natural Factors|v|image|4703

Quick-Blast

Soothes your throat and clears your sinuses
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Rutin 250 mg, Natural Factors|v|image|1391

Rutin 250 mg

Effective antioxidant for good health and to increase circulation
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Sambucus Black Elderberry with Vitamins C & D plus Zinc, Natural Factors|v|image|4708

Sambucus Black Elderberry with Vitamins C & D plus Zinc

Relieves cold and flu symptoms
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Selenium 100 mcg, Natural Factors|v|image|1673

Selenium 100 mcg

Supports the maintenance of good health
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Selenium 200 mcg, Natural Factors|v|image|1670

Selenium 200 mcg

Supports the maintenance of good health
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Selenium 50 mcg, Natural Factors|v|image|1668

Selenium 50 mcg

Supports the maintenance of good health
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SelenoExcell Selenium 200 mcg, Natural Factors|v|image|1675

SelenoExcell Selenium 200 mcg

Potent antioxidant mineral and free radical scavenger
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SunVitamin D3 1000 IU, Natural Factors|v|image|1055

SunVitamin D3 Drops 1000 IU

Helps prevent vitamin D deficiency
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SunVitamin D3 Drops 2500 IU, Natural Factors|v|image|1077

SunVitamin D3 Drops 2500 IU

Helps prevent vitamin D deficiency
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