Gade Nutrition Quercetin with Bromelain Elderberry Vitamin C and Zinc | Sambucus Immune Support Supplement 500mg Capsules | Gluten-Free | Made in USA | 2 Month Supply Third Party Tested

Supplement facts

Ingredient	Amount per serving	% daily value
Vitamin C (as Ascorbic Acid)	120 mg	133%
Vitamin D3 (as Cholecalciferol)	25 mcg	125%
Zinc (as Zinc oxide)	22 mg	200%
Quercetin	500 mg	—
(from Sophora Japonica Bud Extract) Part of Quercetin	—	—
Elderberry Extract 4:1	300 mg	—
(Sambucus nigra) Part of Elderberry Extract 4:1	—	—
** (Equivalent to 1200 mg of 4:1 extract Elderberry) Part of Elderberry Extract 4:1	—	—
Bromelain	200 mg	—
(from Pineapple Stem) (2400 GDU/gram) Part of Bromelain	—	—

Label data transcribed from product photos.

Label data as of 3 Sep 2026

82.7 / 100Very good

This is a broadly dosed combination formula, but the elderberry equivalence statement is unclear and the label provides no explicit directions.

Scoring criteria

Quantity
100 / 100
The assumed two-capsule serving provides a reasonable supplemental amount of quercetin, bromelain, elderberry extract, vitamin C, vitamin D3, and zinc.
Form
75 / 100
The formula uses ordinary quercetin extract, zinc oxide, ascorbic acid, cholecalciferol, elderberry extract, and activity-specified bromelain without a clear broad absorption or tolerability advantage.
Convenience
85 / 100
One serving daily is assumed because the supplied label shows a serving size but no explicit directions.
Label accuracy
50 / 100
The elderberry lines are internally unclear because 300 mg of 4:1 extract is also described as equivalent to 1200 mg of 4:1 extract.
Formula balance
75 / 100
The ingredients are broadly role-consistent at the assumed serving, but no established added synergy is demonstrated and the elderberry preparation is ambiguously described.
Purity
75 / 100
The label claims third-party testing and GMP production but provides no named certification body or verifiable test details.
Cofactors
75 / 100
Vitamin C, vitamin D3, and zinc are relevant declared nutrients for the stated immune-support role and are not merely token amounts.