1 Product identity

Ingredient risk

No flagged ingredients

Herbal Immune Support Formula

Name: Herbal Immune Support Formula
Brand: Royal Guard

BrandRoyal Guard→Other Combinations Capsule 20 ingredients DSLD #15516

Net contents: 30 Individual Pack(s)

Target: Adults and Children 4 years and above

DSLD entry: 2012-11-21

2 Ingredients (20)

IngredientGroupSafety

Vitamin AVitamin AConditionally Safe

Vitamin CVitamin CGenerally Safe

Vitamin EVitamin EConditionally Safe

Olive leaf extractOlive —

EchinaceaEchinacea angustifolia—

AstragalusAstragalusGenerally Safe

Chinese Green TeaGreen Tea—

Red Wine ConcentrateRed Wine—

TurmericTurmericConditionally Safe

GarlicGarlic—

SchisandraSchisandraGenerally Safe

Pau d'ArcoPau d'Arco—

GoldensealGoldensealLimited Evidence

Shiitake MushroomShiitake Mushroom—

Grape SeedGrape —

BioperineBlack Pepper—

Microcrystalline CelluloseCellulose—

SilicaSiliconGenerally Safe

Vegetable CelluloseCellulose—

purified WaterWater—

Ingredient amounts require the full DSLD label. View full label at NIH DSLD →

3 Safety cross-reference

Vitamin A — Conditionally Safe

⚠ Teratogenic at high doses

⚠ Hepatotoxic with chronic excess

Vitamin C — Generally Safe

⚠ GI distress at high doses

⚠ Kidney stones risk >1g/day

Vitamin E — Conditionally Safe

⚠ Increased bleeding risk

⚠ All-cause mortality at >400 IU/day

Olive Leaf Extract — Limited Evidence

⚠ May lower blood pressure and glucose

⚠ GI effects

NAC — Limited Evidence

⚠ GI upset

⚠ Rare bronchospasm

Astragalus — Generally Safe

⚠ Immunostimulatory

⚠ May lower blood glucose

Schisandra — Generally Safe

⚠ GI discomfort

⚠ May affect CYP enzymes

Goldenseal — Limited Evidence

⚠ Contains berberine — same CYP inhibition concerns

⚠ Hepatotoxicity at high doses

Silicon — Generally Safe

⚠ Very low toxicity

4 Label claims

• All Other

• Structure/Function

5 Data source

DSLD ID15516

Full labelView at NIH DSLD →

SourceOffice of Dietary Supplements, NIH

Market statusOn market

Entry date2012-11-21

6 More from Royal Guard

View Royal Guard Safety Scorecard → 4 products

2-Phase Dual Immune Booster Arabinogalactans/Olive Leaf Complex Esterified Vitamin C

7 Cite this page

Vancouver

Pkhakadze G. Herbal Immune Support Formula — product analysis [Internet]. Tbilisi: Public Health Institute of Georgia; 2026 [cited 2026 Aug 28]. Available from: https://supplement.ge/products/dsld-15516/

CC BY 4.0. Product data from NIH DSLD; safety analysis by SupplementIndex.

Analyzed by SupplementIndex

PHIG · Editor-in-Chief: Prof. Giorgi Pkhakadze, MD, MPH, PhD

Product data sourced from the NIH Dietary Supplement Label Database (DSLD). Safety cross-referencing by SupplementIndex. This analysis is for informational purposes only. For corrections: info@accreditation.ge.
Publisher: PHIG