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Natural Immune System Boosters - Elderberry, Vitamin C, Zinc, Echinacea & More

Strengthen your body’s defenses the natural way with our best-selling immune system boosters. Featuring clinically studied elderberry syrups & gummies, high-potency vitamin C, chelated zinc lozenges, echinacea, probiotics, and wellness formulas from trusted brands like Sambucol, Source Naturals, Boiron, Wellness Formula, and Planetary Herbals.

Perfect for daily prevention, at the first sign of a cold or flu, or year-round immune support. All products are non-GMO, gentle, and free from artificial additives.

  • Elderberry Syrup & Gummies - Sambucol Black Elderberry, clinically shown to reduce flu duration
  • Vitamin C + Zinc Lozenges - Fast-acting immune activation
  • Echinacea & Goldenseal - Traditional herbal immune stimulants
  • Wellness Formula & Defense Formulas - Source Naturals award-winning blends
  • Probiotics & Mushroom Complexes - Gut-immune axis support (reishi, turkey tail, astragalus)
  • Oscillococcinum & Homeopathics - Boiron flu relief & prevention
  • Kids Immune Support - Chewables, gummies & syrups designed for children

Stay healthy naturally – fast shipping • 100% satisfaction guarantee • Expertly curated since 2001.

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Aura Cacia - Medieval Mix 0.5 fl. oz. Aura Cacia - Medieval Mix 0.5 fl. oz.

Aura Cacia Medieval Mix is a must-have blend for DIY cleaning recipes and home care diffusions and blends. This powerful blend of oils can take care of the trickiest home problems.


Price: $11.90
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Planetary Herbals Well Child Immune Chewable 60 wafers Planetary Herbals - Well Child Immune Chewable 60 wafers

A strong immune system is vitally important for children, especially when they begin school or day care. Containing acerola cherry, a natural source of vitamin C, echinacea, and astragalus as key ingredients, Well Child™ Immune Chewable wafers are specially formulated to support a healthy immune system in our children.

Price: $28.00
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Source Naturals Children's Immune Chewable 60 wafers Source Naturals - Wellness Children's Immune Chewable 60 wafers

Wellness Children's Immune Chewable™ is a powerful cold weather blend, designed to support children's immune defenses. It is carefully formulated with safe dosages of herbs and nutrients-including echinacea, elderberry, astragalus, marshmallow, mushrooms, and zinc-plus advanced special ingredients such as beta-glucan and transfer factor. And it is offered in kid-friendly, raspberry flavored wafers.

Price: $27.00
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Source Naturals MEGA-Kid Chewable Multi-Vitamin 120 wafers Source Naturals MEGA-Kid Chewable Multi-Vitamin 120 wafers

Your child deserves only the best, so we use high quality bioavailable forms of the nutrients in Mega-Kid™ for absorption and utilization. Serious nutrition for children ages 2-10.

Price: $39.25
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Source Naturals Allercetin Allergy & Sinus 48 homeopathic tablets bottle for seasonal nasal and sinus relief Source Naturals - Allercetin Allergy & Sinus 48 tabs

Homeopathic allergy relief with Quercetin, Bromelain, and 9 active ingredients. Supports sinus health and normal histamine response. 48 tablets.

Price: $12.00
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Source Naturals Herbal Resistance Liquid 2oz Source Naturals - Herbal Resistance Liquid 2 oz

Wellness Herbal Resistance™ Liquid contains a combination of herbs designed to help support your immune system. Echinacea and coptis have been traditionally used to promote well-being while Yin Chiao, a valued traditional Chinese herbal complex, helps our bodies maintain a sense of balance.

Price: $14.50
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Source Naturals Herbal Resistance Liquid 4oz Source Naturals - Herbal Resistance Liquid 4 oz

Source Naturals Wellness Herbal Resistance Liquid 4oz: Potent herbal immune support blend with echinacea, elderberry, and Yin Chiao for seasonal balance. Fast-absorbing liquid; 1/2 tsp 3x daily. Gluten-free, vegetarian—trusted for 40+ years.

Price: $27.00
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Source Naturals FluGuard .88oz/565 pellets Source Naturals - WellGuard 565 pellets

May reduce the duration and severity of signs of immune imbalance, including pain, respiratory distress, headaches, a feeling of lethargy, coughs, soreness, chills and fever, and congestion.

Price: $21.75
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Source Naturals Wellness Formula 45 tabs Source Naturals - Wellness Formula 45 tabs

Wellness Formula® delivers high-potency vitamin C, plus more than 30 other vitamins, minerals and time-tested herbs for advanced immune support.

Advanced Immune Support 2024 Vity Award #1 Immune Formula

Price: $14.50
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Source Naturals Wellness Formula 60 Capsules bottle – #1 Immune Defense Supplement Source Naturals - Wellness Formula 60 caps

Source Naturals Wellness Formula 60 Capsules – the #1 immune support supplement in America. Advanced formula with echinacea, elderberry, zinc & vitamin C for powerful daily or seasonal defense.

Price: $13.75
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Source Naturals Wellness Colloidal Silver 30 ppm Liquid (2fl.oz.) Source Naturals Wellness Colloidal Silver 30 ppm Liquid (2 fl.oz.)

WELLNESS COLLOIDAL SILVER products provide the key trace mineral silver in convenient liquid, nasal spray, and throat spray delivery forms. Silver has been a potent resource for centuries and was highly valued in ancient China as well as in the Indian Ayurvedic system.

Price: $21.75
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Source Naturals Wellness Collodial Silver Throat Spray 30ppm (2fl.oz.) Source Naturals - Wellness Colloidal Silver Throat Spray 30ppm (2fl.oz.)

Wellness Colloidal Silver products provide the key trace mineral silver in convenient liquid, nasal spray, and throat spray delivery forms. Silver has been a potent resource for centuries and was highly valued in ancient China as well as in the Indian Ayurvedic system.

Price: $22.00
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ABRA - Cold & Flu Bath ABRA - Cold & Flu Bath 17 oz.

The Cold and Flu bath is used to gently purge the system of cold and flu germs with a blend of natural minerals and organic herbs of sage (salvia officinalis) and echinacea (E. purpurea).

Price: $14.00
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Source Naturals Wellness Zinc Lozenges 23mg 60 Tablets bottle – Immune Support with Vitamin C” Source Naturals - Wellness Zinc Lozenge 60 lozenges

Source Naturals Wellness Zinc Lozenges 23mg 60 Tabs – powerful immune support with 23mg zinc + 100mg vitamin C per lemon-lime lozenge. Soothes throat & helps shorten cold symptoms.

Price: $10.50
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Source Naturals Herbal Resistance Liquid 8oz Source Naturals - Herbal Resistance Liquid 8 oz - exp. 2/26

Wellness Herbal Resistance™ Liquid contains a powerful combination of herbs, designed to help support the immune system. Echinacea and goldenseal promote well-being, while Yin Chiao, a valued Chinese herbal complex, helps our bodies maintain a sense of balance.

Sale Price: $49.00
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Source Naturals Wellness Herbal Kids Liquid 4oz Source Naturals - Wellness Herbal Kids Liquid 4oz - exp. 1/26

Wellness Herbal Kids™ contains a powerful combination of herbs designed to support the immune system.


Sale Price: $24.00
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Source Naturals Wellness Herbal Throat Spray 2oz. Source Naturals - Wellness Herbal Throat Spray 2oz.

Wellness Herbal Throat Spray™ contains a powerful combination of herbs specially formulated to provide soothing immune support for your throat health.

Price: $22.25
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Planetary Herbals Bupleurum Liver Cleanse -- 530 mg - 72 Tablets Planetary Herbals - Bupleurum Liver Cleanse 545mg 72 Tablets

A unique herbal formula that unites the healing traditions of three cultures to provide a comprehensive and well-balanced program for deep internal cleansing. It helps the overburdened liver by "dredging" it of old, stored-up waste matter, and strengthening it with nourishing herbs.

Price: $14.25
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Source Naturals Wellness Defense 48 homeopathic tablets – temporary relief for cold & flu symptoms Source Naturals - Wellness Defense 48tabs

Wellness Defense™ is a Bio-Aligned® homeopathic formula designed to stimulate your body’s own natural defenses at the first sign of immune imbalance. Temporarily relieves common cold & flu symptoms including runny nose, congestion, sore throat, headache, nausea, cough, body aches, fever, and chills.

Price: $12.50
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Liberating Yourself from Lyme An Integrative and Intuitive Guide to Healing Lyme Disease By Vir McCoy and Kara Zahl Liberating Yourself from Lyme: An Integrative and Intuitive Guide to Healing Lyme Disease by Vir McCoy and Kara Zahl

In this medical intuitive approach to Lyme, the authors share their personal Lyme journeys and their integrative healing protocol that bridges the scientific and the spiritual. They explore the peculiarities of Lyme disease, including how Lyme is often misdiagnosed, giving it time to establish itself deep within the body’s organs and nervous system, and examine in detail new and standard remedies, with thorough scientific references.

Price: $19.00
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Source Naturals Wellness Oil of Oregano 60 caps Source Naturals - Wellness Oil of Oregano 60 caps

Source Naturals Oil of Oregano is from wildcrafted true oregano (Origanum vulgare), an aromatic herb that is native to the Mediterranean region. Traditionally, oregano was used to support digestive and respiratory health. Source Naturals Oil of Oregano is one of the most potent on the market and is standardized to 70% carvacrol.

Price: $25.50
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Planetary Herbals | Mullein Lung Complex Planetary Herbals - Mullein Lung Complex 850mg 90 tablets

Mullein Lung Complex™ is a premier mullein and wild cherry bark compound. It combines the smoothing effects of mullein and licorice, the tonifying properties of ophiopogon and platycodon, and the pungent qualities of elecampane, ginger, and cinnamon (cassia), all known to support a healthy respiratory system.

Price: $20.00
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Three Spices Sinus Complexâ„¢ 1000mg 90 tablets Planetary Herbals - Three Spices Sinus Complex 1000mg 90 tablets

Planetary Herbals Three Spices Sinus Complex™ is modeled after the famed Trikatu formula of the 5,000 year old tradition of Ayurvedic herbalism.
Used for more than 1,000 years, this warm and spicy blend has traditionally been used to support digestion, the lungs and sinuses.

Price: $16.00
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Planetary Herbals Loquat Respiratory Syrup 8oz Planetary Herbals - Loquat Respiratory Syrup 8 oz

Traditional Chinese herbalists have used the leaves of the loquat tree to support respiratory health since at least 500 A.D. Planetary Herbals LOQUAT RESPIRATORY SYRUP combines loquat leaves with other key botanicals including the inner barks of slippery elm and black cherry, two botanicals long used by traditional western herbalists for supporting respiratory health.

Price: $22.00
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Boiron - SinusCalm® 60 Tablets SinusCalm 60 Tablets

SinusCalm by Boiron is specifically designed to relieve nasal congestion, sinus pain and pressure, and headache due to the common cold or allergies. The non-drowsy, meltaway tablets are phenylephrine-free and won’t interact with other medications, including those for colds and allergies — two of the main causes of sinus congestion.

Price: $13.50
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Source Naturals ArcticPure® Ultra Potency Omega-3 Fish Oil Source Naturals - ArcticPure Ultra Potency Omega-3 Fish Oil 60 softgels

Source Naturals ArcticPure® Ultra Potency Omega-3 Fish Oil not only supports the functions of the brain, joints and circulatory system, it also strengthens the immune system. Each softgel contains a potent 850 mg of omega-3. ArcticPure® uses fish oils from the cleanest sources on Earth. A series of advanced molecular distillation processes extracts and concentrates the beneficial fatty acids from the raw oil, resulting in a product of outstanding purity.

Price: $16.50
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Planetary Herbals Cilantro Heavy Metal Detoxâ„¢ 2oz Planetary Herbals - Cilantro Heavy Metal Detox™ 2 oz

Cilantro Heavy Metal Detox™ is designed to bind to heavy metals to clear them from the body. The combination of cilantro and chlorella elicits a potent cleansing action and provides antioxidant support for overall cellular health.

Price: $14.25
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NutriBiotic® Maximum GSE Liquid Concentrate 1 oz. liquid NutriBiotic - Maxiumim GSE Liquid Concentrate 1 fl. oz.

NutriBiotic® Maximum GSE Liquid Concentrate provides the highest concentration of grapefruit seed extract available. Contains Citricidal (60% grapefruit seed extract and 40% vegetable glycerin), a compound derived from the seed and pulp of grapefruit. The grapefruit bioflavonoids (polyphenolics) are converted into an extremely potent compound.


Price: $17.00
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Nutribiotic - Grape Seed Extract Capsules 250 mg, 60 Caps NutriBiotic - Grapefruit Seed Extract Capsules 250 mg, 60 Caps

NutriBiotic® GSE Capsules contain grapefruit seed extract, a compound derived from the seed and pulp of grapefruit. This formula is used by healthcare professionals worldwide.

This product is easy to swallow. Each capsule contains the same amount of grapefruit seed extract as 25 drops of Grapefruit Seed Extract Liquid Concentrate.

Price: $14.00
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NutriBiotic - Defense Plus 250 mg GSE, 45 Tabs NutriBiotic - Defense Plus 250 mg GSE, 45 Tabs

NutriBiotic® DefensePlus® Tablets are a unique formulation combining grapefruit seed extract, vitamin C, astragalus, echinacea extract, Oregon grape root, ginger root extract, yarrow extract, zinc, and the mushroom extracts of reishi, maitake, and shiitake and are used by healthcare professionals worldwide.

Price: $18.00
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Best Natural Immune Boosters for 2025–2026 Cold & Flu Season

With flu and cold cases rising, people are turning to proven natural immune system boosters like elderberry (shown in studies to reduce symptom duration by up to 4 days), zinc (shortens colds), and high-dose vitamin C + bioflavonoids.

Our top recommendations:

  • Sambucol Black Elderberry Syrup & Gummies – #1 pharmacist-recommended
  • Source Naturals Wellness Formula – Legendary herbal defense blend
  • Zinc + Vitamin C lozenges – Stop colds in their tracks
  • Oscillococcinum – Homeopathic flu medicine (take at first symptoms)

Frequently Asked Questions:
Best natural immune booster? Sambucol Elderberry + Wellness Formula combo.
When to start taking immune boosters? Daily during cold/flu season or at first sign of exposure.
Safe for kids? Yes – many child-specific formulas available.
Do these replace the flu shot? No, but they complement prevention strategies.