1 Product identity
Ingredient risk
2 ingredients to use with caution
2-Phase Dual Immune Booster
BrandRoyal Guard→Other Combinations Tablet or Pill 17 ingredients 2 caution DSLD #15515Net contents: 30 Individual Pack(s)
Target: Adults and Children 4 years and above
DSLD entry: 2012-11-21
2 Ingredients (17)
IngredientGroupSafety
ArabinogalactansArabinogalactan—
Olive LeafOlive —
Microcrystalline CelluloseCellulose—
Hydroxypropyl MethylcelluloseHypromellose—
Stearic AcidStearic Acid—
natural colorsColor—
Ingredient amounts require the full DSLD label. View full label at NIH DSLD →
⚠️ Use with caution — restricted in some markets
Zinc — Chronic zinc >40 mg/day without copper causes copper deficiency: anemia, neutropenia, myeloneuropathy [1].
Magnesium — Severe deficiency (<0.50 mmol/L) causes secondary hypocalcemia and hypokalemia that will not correct until magnesium is repleted first [1].
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
Zinc — Use with Caution
⚠ Copper deficiency at >40 mg/day
⚠ Nausea, metallic taste
Andrographis — Conditionally Safe
⚠ GI discomfort
⚠ Headache
NAC — Limited Evidence
⚠ GI upset
⚠ Rare bronchospasm
Elderberry — Limited Evidence
⚠ Raw berries: cyanogenic glycosides
⚠ Cytokine storm concern
Lactobacillus — Limited Evidence
⚠ Rare sepsis if immunocompromised
⚠ Gas initially
Magnesium — Use with Caution
⚠ Diarrhea (especially oxide)
⚠ Accumulates in renal impairment
Silicon — Generally Safe
⚠ Very low toxicity
GLA — Limited Evidence
⚠ May lower seizure threshold
⚠ Borage oil: hepatotoxic unless PA-free
4 Label claims
• All Other
• Structure/Function
5 Data source
DSLD ID15515
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
Arabinogalactans/Olive Leaf ComplexEsterified Vitamin CHerbal Immune Support Formula7 Cite this page
Vancouver
Pkhakadze G. 2-Phase Dual Immune Booster — product analysis [Internet]. Tbilisi: Public Health Institute of Georgia; 2026 [cited 2026 Aug 27]. Available from: https://supplement.ge/products/dsld-15515/
CC BY 4.0. Product data from NIH DSLD; safety analysis by SupplementIndex.
GP
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
Publisher: PHIG