Swisse
ULTIBOOST

90/100
SUPPIE SCORE
78/100
EFFICACY
High
SAFETY
100/100
CLEANLINESS
What Does ULTIBOOST Do?
Label provides 1 g vitamin C as ascorbic acid from calcium ascorbate dihydrate per serving; this meets studied supplemental ranges for antioxidant and immune effects but exceeds RDA with no additional bioavailability data for the specific form.
What is the evidence for 1000 mg vitamin C daily reducing cold duration?
How does calcium ascorbate compare to plain ascorbic acid for absorption?
Are there any dose-specific gastrointestinal risks with this 1 g vitamin C serving?
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What Are the Benefits of ULTIBOOST?
Based on proven scientific research
Immune supportStrong
Antioxidant activityStrong
Collagen synthesisStrong
Wound healing supportModerate
Good For:
What Are the Side Effects of Swisse ULTIBOOST?
Always consult your health practitioner if in doubt.
RiskLow Risk
Overview
•1000 mg dose is below the 2000 mg adult UL; GI upset possible above this level.
•May increase oxalate excretion and stone risk in susceptible individuals with history of kidney stones.
•High doses can enhance non-heme iron absorption; caution with hemochromatosis.
•Limited evidence on long-term daily use at this exact dose in healthy adults.
Potential Side Effects
Negative Interactions
Inactive Ingredients
Safe Formulation!
Great news, this product doesn't contain harmful ingredients!
What Are the Ingredients in Swisse ULTIBOOST?
VITAMIN C (ascorbic acid from calcium ascorbate dihydrate 1.21 g)
1 g
Swisse Ultiboost High Strength Vitamin C
1000mg
Dosage & Bioavailability
How the active doses and forms in ULTIBOOST compare to the research.
•VITAMIN C (ascorbic acid from calcium ascorbate dihydrate 1.21 g) — 1 g; calcium ascorbate form shows comparable or slightly higher bioavailability than plain ascorbic acid.
•Swisse Ultiboost High Strength Vitamin C — 1000mg; absolute active yield matches the stated 1 g vitamin C with no undisclosed blend components.
Sources & References
Swisse ultiboost high strength vitamin c 1000mg effervescent 60 tablets x2 exp 01 2026
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PMC2649700
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NBK499877
Information from www.ncbi.nlm.nih.gov
VitaminC HealthProfessional
Information from ods.od.nih.gov
Frequently Asked Questions
Common questions about Swisse ULTIBOOST