1 Product identity
Ingredient risk
1 ingredient to use with caution
Esterified Vitamin C
BrandRoyal Guard→Vitamin Tablet or Pill 7 ingredients 1 caution DSLD #15513Net contents: 30 Individual Pack(s)
Target: Adults and Children 4 years and above
DSLD entry: 2012-11-21
2 Ingredients (7)
IngredientGroupSafety
Stearic AcidStearic Acid—
Microcrystalline CelluloseCellulose—
Ingredient amounts require the full DSLD label. View full label at NIH DSLD →
⚠️ Use with caution — restricted in some markets
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 C — Limited Evidence
⚠ GI distress at high doses
⚠ Kidney stones risk >1g/day
Calcium — Conditionally Safe
⚠ Cardiovascular risk debated >1,000 mg/day
⚠ Kidney stones
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 ID15513
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 BoosterArabinogalactans/Olive Leaf ComplexHerbal Immune Support Formula7 Cite this page
Vancouver
Pkhakadze G. Esterified Vitamin C — product analysis [Internet]. Tbilisi: Public Health Institute of Georgia; 2026 [cited 2026 Aug 27]. Available from: https://supplement.ge/products/esterified-vitamin-c-15513/
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