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Ranked by evidence

Best Immune Support Supplements

The 10 highest-scoring immune support supplements in Formulate's catalog, ranked by the same automated rubric we apply to every product: ingredient dose, bioavailable form, label transparency, safety, and third-party testing. No sponsorships, no pay-to-play.

Scored by the Formulate Research Team · Last reviewed July 2026

  1. 1
    Pure Encapsulations
    L-Lysine

    Strongest on transparency (100/100).

    94A
  2. 2
    Nutricost
    Echinacea Capsules

    Strongest on transparency (100/100).

    91A
  3. 3
    BulkSupplements
    Acerola Cherry Extract Powder

    BulkSupplements.com Offers Pure Bulk Supplements, Vitamins, Minerals, Amino Acids, Herbal Extracts, Sweeteners and Protein Powders. Pure bulk powders.

    90A
  4. 4
    Pure Encapsulations
    Liposomal Vitamin C liquid

    Strongest on transparency (100/100).

    88A
  5. 5
    Nutricost
    Vitamin E Softgels

    Strongest on transparency (100/100).

    88A
  6. 6
    Pure Encapsulations
    Arabinogalactan

    Strongest on transparency (100/100).

    87A
  7. 7
    Nutricost
    Quercetin (1000mg)

    Strongest on transparency (100/100).

    87A
  8. 8
    Pure Encapsulations
    Quercetin

    Strongest on transparency (100/100).

    86A-
  9. 9
    Pure Encapsulations
    Olive Leaf Extract

    Strongest on transparency (100/100).

    86A-
  10. 10
    Pure Encapsulations
    Colostrum 40% IgG

    Strongest on transparency (100/100).

    86A-

Frequently asked questions

What is the best immune support supplement?

Pure Encapsulations L-Lysine is Formulate's highest-scoring immune support supplement at 94/100 (grade A). Strongest on transparency (100/100).

How does Formulate rank immune support supplements?

Each product is scored 0–100 by the same automated rubric. Clinical evidence, dose accuracy and bioavailable form carry the score; manufacturing, label transparency and safety are checked separately and can only cost points. Rankings reflect the formula on the label — not advertising or sponsorships.

How many immune support supplements were compared?

This ranking shows the top 10 immune support products Formulate has scored. Browse the full catalog for every product and its breakdown.

Best supplements by category

Best MineralsBest NootropicsBest AdaptogensBest Amino AcidsBest AntioxidantsBest MultivitaminsBest Heart HealthBest Energy

How these are ranked

Every immune support product is scored on dose accuracy, ingredient form, certifications, transparency, and third-party testing — the same rubric across the whole catalog. See the methodology page for the full breakdown, or browse every supplement.

Educational only. Rankings reflect product formulation quality, not personalized medical advice. Talk to a qualified healthcare provider before starting a new supplement, especially if you take medication.