Supplements for Immunity

Immunity: 66 compounds are used here, 31 of them at evidence level A. The most used is Vitamin D3. Between them there are 344 documented interactions — which is why the order and timing of a stack matters as much as the choice.

0 compounds

0 interactions

0 evidence A

Where the evidence is strongest

Ranked by popularity, with what each one actually does

Vitamin D3

Bone health & immune support

1000-2000 IU Morning with fat Evidence A 85% absorbed

Comprehensive Immune Support Complex

Comprehensive immune system support

1-3 servings daily With meals Evidence A 80% absorbed

Vitamin C (Ascorbic Acid)

Immune support & antioxidant

500-1000 mg Divided doses with meals Evidence A 80% absorbed

Lactobacillus rhamnosus

Immune support & antibiotic protection

1-20 billion CFU With meals or during antibiotics Evidence A 90% absorbed

Vitamin D for Autoimmune Disease Support

Autoimmune prevention & management

2,000-6,000 IU daily With fat containing meal Evidence A 85% absorbed

What these are, chemically

7 types

Botanicals 28 Compounds 9 Probiotics 8 Vitamins 7 Amino Acids 5 Minerals 3 Blends & Formulas 2

Choosing between forms

Same compound, different absorption

Bifidobacterium longum vs Lactobacillus rhamnosus 85% · 90% Lactobacillus casei vs Lactobacillus rhamnosus 85% · 90% Bifidobacterium longum vs Lactobacillus casei 85% · 85% Vitamin C (Ascorbic Acid) vs Vitamin C (Sodium Ascorbate) 80% · 85% Zinc Bisglycinate vs Zinc Gluconate 85% · 60% Zinc Gluconate vs Zinc Picolinate 60% · 95% Zinc Bisglycinate vs Zinc Picolinate 85% · 95% Vitamin D for Autoimmune Disease Support vs Vitamin D3 85% · 85%

All 66 compounds

dose · evidence · documented interactions

Vitamin D3 Bone health & immune support 1000-2000 IU A 5 Comprehensive Immune Support Complex Comprehensive immune system support 1-3 servings daily A 6 Vitamin C (Ascorbic Acid) Immune support & antioxidant 500-1000 mg A 5 Lactobacillus rhamnosus Immune support & antibiotic protection 1-20 billion CFU A 6 Vitamin D for Autoimmune Disease Support Autoimmune prevention & management 2,000-6,000 IU daily A 5 Omega-3 + Curcumin + Vitamin D Triple Anti-Inflammatory Formula Triple anti-inflammatory & immune support 2-4g omega-3 + 500-1000mg curcumin + 2000-4000 IU vitamin D A 6 Omega-3 Fatty Acids for Autoimmune Support Anti-inflammatory & immune modulation 1-4g EPA/DHA daily A 5 Zinc Gluconate Immune support & cold prevention 15-25 mg A 6 Vitamin C (Sodium Ascorbate) Gentle immune support & antioxidant 500-2000 mg A 5 Bifidobacterium longum Digestive & immune health 1-20 billion CFU A 6 Lactobacillus casei Digestive health & immune support 1-20 billion CFU A 6 Bifidobacterium animalis Digestive regularity & immune support 1-20 billion CFU A 6 Curcumin for Autoimmune Condition Support Anti-inflammatory & immune modulation 500-1,500mg daily A 5 Multi-Strain Probiotic Digestive & immune health 10-50 billion CFU A 6 Garlic Allicin for Antimicrobial Protection Antimicrobial & immune support 600-1,200mg daily B 5 Tea Tree Oil Acne treatment & antimicrobial 5-15% topical dilution A 5 Undenatured Collagen Type II Joint health & immune tolerance 40mg A 5 Vitamin A (Retinyl Palmitate) Direct vitamin A for immune & vision 2500-8000 IU A 5 Zinc Bisglycinate Superior absorption immune support 15-25 mg A 6 Zinc Picolinate Superior immune & healing support 15-30 mg A 6 Probiotics for Autoimmune Disease Support Gut health & immune modulation 10-100 billion CFU daily B 5 Echinacea for General Immune Support Immune system support 300-900mg daily B 5 Lactobacillus paracasei Immune support & allergy management 1-10 billion CFU A 6 Vitamin A (Retinol) Vision & immune support 2500-5000 IU A 5 Astragalus Immune enhancement & energy support 1000-3000mg B 5 Bacillus clausii Antibiotic protection & immune support 2-4 billion CFU A 6 Bifidobacterium breve Immune balance & allergy prevention 1-20 billion CFU A 6 Echinacea Immune support & cold prevention 300-900mg B 5 Eucalyptus Respiratory decongestant & antimicrobial 200-400mg B 5 L-Lysine Immune support & collagen synthesis 1-3g A 5 Quercetin for Respiratory Health Support Respiratory & allergy support 500-1,000mg daily B 5 L-Glutamic Acid Brain function & immune support 2-6g A 5 Oregano Oil Powerful respiratory antimicrobial 100-300mg B 5 Elderberry Cold & flu prevention 300-1200mg B 5 N-Acetylcysteine (NAC) for Respiratory Health Respiratory & lung support 600-1,200mg daily A 5 Cranberry Extract UTI prevention & urinary health 500-1500mg B 5 Beta-Glucan Cholesterol reduction & immune support 3-10 g (oat) or 250-500 mg (mushroom) A 6 Lactoferrin Immune defense & antimicrobial protection 100-400mg A 5 Oregano Oil for Antimicrobial Protection Antimicrobial & pathogen defense 1-3 drops diluted daily B 5 Olive Leaf Extract Cardiovascular & immune support 250-1000mg B 5 Thyme Respiratory antimicrobial & expectorant 200-600mg B 5 Vitamin D2 (Ergocalciferol) Vegan bone & immune support 2000-4000 IU A 5 Cat's Claw Immune modulation & anti-inflammatory support 350-1000mg B 5 Licorice Root Respiratory anti-inflammatory & soothing 200-400mg B 5 Quercetin Immune support & allergy relief 500-1000mg B 5 Monolaurin for Antiviral and Antimicrobial Protection Antiviral & antimicrobial 600mg-1.5g daily C 5 Spirulina Complete nutrition & antioxidant support 3-10g B 5 L-Threonine Immune & digestive support 500-1500mg A 5 Pau d'Arco Antifungal support & immune enhancement 500-3000mg C 5 Ivy Leaf Cough relief & bronchodilator 25-50mg B 5 Caprylic Acid Ketone production & antimicrobial support 5-15 ml (1-3 teaspoons) B 6 Eucalyptus for Respiratory Health Support Respiratory & decongestant 200-400mg extract or inhalation B 5 Grapefruit Seed Extract for Antimicrobial Protection Antimicrobial & antifungal 5-15 drops diluted daily C 5 L-Histidine Tissue healing & immune support 500-2000mg A 5 Transfer Factor Immune memory & pathogen recognition 1-3 capsules B 5 Mullein Respiratory soothing & lung support 300-800mg C 5 Reishi Stress relief & sleep support 500-2000mg B 5 Ivy Leaf Extract for Respiratory Health Support Respiratory & cough support 300-600mg daily B 5 Shiitake Immune support & cholesterol reduction 1000-3000mg B 5 Cordyceps Energy & athletic performance 500-3000mg B 5 Colloidal Silver for Antimicrobial Support Antimicrobial (topical use preferred) Topical use only recommended C 4 Juniper Berry Urinary tract antimicrobial & kidney support 300-600mg C 5 L-Asparagine Nervous system & immune support 1-5g B 5 Turkey Tail Immune support & cancer defense 500-3000mg B 5 Maitake Blood sugar control & immune support 500-3000mg B 5 Chaga Antioxidant protection & anti-aging 500-2000mg C 5

Common questions

What are the best supplements for immunity?

By usage and evidence: Vitamin D3, Comprehensive Immune Support Complex, Vitamin C (Ascorbic Acid). 31 compounds here carry evidence level A, meaning the effect was studied directly rather than inferred.

How many supplements for immunity can you take at once?

There is no fixed limit, but every added compound multiplies possible interactions. The compounds on this page have 344 documented interactions between them — check a pair before stacking it.

How long until supplements for immunity start working?

Depends on the compound. Each page lists first effects and peak benefit windows separately, because the two differ by weeks for most compounds.