Vitamins & Immunity · Expert-vetted

The immunity supplements actually worth your money.

We analyse thousands of iHerb reviews, cross-check the research, and surface only the supplements that deliver. No affiliate-first rankings. Just science-backed picks.

Ask the AI advisor →See the top picks

★ 4.8 avg·12,000+ reviews analyzed·Updated June 2026

Editor's Choice

VitaCore

Vitamin C 1000mg + Bioflavonoids

(3,241)

$12.99$18.99Save 32%

Read full review →

Top Sellers This Week

What everyone's stocking up on

Omega-3 Premium Fish Oil$11.00

California Gold Nutrition LactoBif 30 Probiotics, 30 Billion CFU, 60 Capsules

LactoBif 30 Probiotics$13.50

NOW Foods Zinc Picolinate, 50 mg, 120 Veg Capsules

Zinc Picolinate$11.99

California Gold Nutrition Gold C, USP Grade Vitamin C, 1,000 mg, 60 Capsules

Gold C$6.50

NOW Foods Vitamin D-3, 125 mcg (5,000 IU), 120 Softgels

Vitamin D-3$8.00

California Gold Nutrition CollagenUP, Marine Collagen + Hyaluronic Acid + Vitamin C, 206 g

CollagenUP$22.00

Doctor's Best High Absorption Magnesium, 100 mg, 120 Tablets

High Absorption Magnesium$9.00

Sports Research Omega-3 Fish Oil, Triple Strength, 90 Softgels

Omega-3 Fish Oil$25.00

Mad Hippie Vitamin C Serum, 1.02 fl oz (30 ml)

Vitamin C Serum$27.19

#10

Life Extension Immune Packs with Vitamin C, D, Zinc & Probiotic, 30 Packets

Immune Packs with Vitamin C$30.00

#1 Best Seller

California Gold Nutrition Omega-3 Premium Fish Oil, 1,100 mg, 100 Softgels

★4.8(18,204)$11.00

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✓No paid rankings, ever

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This month's top-rated immunity buys

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VIT

Vitamin C 1000mg + Bioflavonoids

Editor's Choice-32%

VitaCore

Vitamin C 1000mg + Bioflavonoids

(3,241)

$12.99$18.99

Read review iHerb →

VIT

Vitamin D3 5000 IU

Best Value-27%

Pure Origin

Vitamin D3 5000 IU

(5,102)

$9.49$13.00

Read review iHerb →

C+Z

Vitamin C + Zinc Effervescent

Bestseller-24%

Pure Origin

Vitamin C + Zinc Effervescent

(3,900)

$11.00$14.50

Read review iHerb →

ELD

Elderberry Immune Syrup

-21%

Lumen Labs

Elderberry Immune Syrup

(2,015)

$16.50$21.00

Read review iHerb →

Find the right supplement category

Vitamin C

5 products

Vitamin D

1 product

Zinc

1 product

Elderberry

1 product

Immune Blend

2 products

Multivitamin

1 product

Probiotics

1 product

Omega-3

1 product

Today's best iHerb coupons

All deals & codes →

All brands

20%

20% off for new customers

WELCOME20copy

Vitamin C

15%

15% off Vitamin C

IMMUNE15copy

Sitewide

25%

25% off sitewide

FLASH25copy

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