Supplements for Immunity

Immunity: 57 compounds are used here, 25 of them at evidence level A. The most used is Vitamin D3. Between them there are 294 documented interactions — which is why the order and timing of a stack matters as much as the choice.

57 compounds

294 interactions

25 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 Very high absorption

Vitamin C (Ascorbic Acid)

Immune support & antioxidant

500-1000 mg Divided doses with meals Evidence A Very high absorption

Lactobacillus rhamnosus

Immune support & antibiotic protection

1-20 billion CFU With meals or during antibiotics Evidence A Very high absorption

Zinc Gluconate

Immune support & cold prevention

15-25 mg With food to avoid nausea Evidence A High absorption

Vitamin C (Sodium Ascorbate)

Gentle immune support & antioxidant

500-2000 mg Divided doses with meals Evidence A Very high absorption

What these are, chemically

7 types

Botanicals 26 Probiotics 8 Vitamins 6 Compounds 6 Amino Acids 5 Minerals 3 Proteins & Peptides 1

Most searched here

what people in this group actually look up

Probiotics for Autoimmune Disease Support Gut health & immune modulation 10-100 billion CFU daily B 60% Vitamin D3 Bone health & immune support 1000-2000 IU A 85% Zinc Picolinate Superior immune & healing support 15-30 mg A 95% L-Lysine Immune support & collagen synthesis 1-3g A 90% Oregano Oil Powerful respiratory antimicrobial 100-300mg B 85% Oregano Oil for Antimicrobial Protection Antimicrobial & pathogen defense 1-3 drops diluted daily B 75%

Which form to buy

the question people actually search

Best form of Collagen 7 forms Marine Collagen · 95% Best form of Zinc 5 forms Zinc Picolinate · 95% Best form of Vitamin D 3 forms Vitamin D3 (Calcidiol) · 95% Best form of Vitamin C 8 forms Vitamin C (Liposomal) · 95%

Choosing between forms

Same compound, different absorption

Zinc Gluconate vs Zinc Picolinate 60% · 95% Zinc Bisglycinate vs Zinc Gluconate 85% · 60% Zinc Bisglycinate vs Zinc Picolinate 85% · 95% Vitamin C (Ascorbic Acid) vs Vitamin C (Sodium Ascorbate) 80% · 85% Vitamin D2 (Ergocalciferol) vs Vitamin D3 60% · 85%

All 57 compounds

dose · evidence · documented interactions

Vitamin D3 Bone health & immune support 1000-2000 IU A 5 Vitamin C (Ascorbic Acid) Immune support & antioxidant 500-1000 mg A 5 Lactobacillus rhamnosus Immune support & antibiotic protection 1-20 billion CFU A 6 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 Multi-Strain Probiotic Digestive & immune health 10-50 billion CFU A 6 Zinc Picolinate Superior immune & healing support 15-30 mg A 6 Zinc Bisglycinate Superior absorption immune support 15-25 mg A 6 Garlic Allicin for Antimicrobial Protection Antimicrobial & immune support 600-1,200mg daily B 5 Undenatured Collagen Type II Joint health & immune tolerance 40mg A 5 Tea Tree Oil Acne treatment & antimicrobial 5-15% topical dilution A 5 Vitamin A (Retinyl Palmitate) Direct vitamin A for immune & vision 2500-8000 IU A 5 Probiotics for Autoimmune Disease Support Gut health & immune modulation 10-100 billion CFU daily B 5 Vitamin A (Retinol) Vision & immune support 2500-5000 IU A 5 Lactobacillus paracasei Immune support & allergy management 1-10 billion CFU A 6 L-Lysine Immune support & collagen synthesis 1-3g A 5 Echinacea Immune support & cold prevention 300-900mg B 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 Eucalyptus Respiratory decongestant & antimicrobial 200-400mg 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 Cranberry Extract UTI prevention & urinary health 500-1500mg B 5 Oregano Oil for Antimicrobial Protection Antimicrobial & pathogen defense 1-3 drops diluted daily B 5 Lactoferrin Immune defense & antimicrobial protection 100-400mg A 5 Beta-Glucan Cholesterol reduction & immune support 3-10 g (oat) or 250-500 mg (mushroom) A 6 Vitamin D2 (Ergocalciferol) Vegan bone & immune support 2000-4000 IU A 5 Olive Leaf Extract Cardiovascular & immune support 250-1000mg B 5 Thyme Respiratory antimicrobial & expectorant 200-600mg B 4 Cat's Claw Immune modulation & anti-inflammatory support 350-1000mg B 5 Quercetin Immune support & allergy relief 500-1000mg B 5 Licorice Root Respiratory anti-inflammatory & soothing 200-400mg 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 4 Caprylic Acid Ketone production & antimicrobial support 5-15 ml (1-3 teaspoons) B 6 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 4 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 Turkey Tail Immune support & cancer defense 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 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, Vitamin C (Ascorbic Acid), Lactobacillus rhamnosus. 25 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 294 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.