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Optimum-C Formula

product on market Capsule Bluebonnet Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 29% of ingredients have research evidence
B Label Compliance Grade

What the Evidence Says

AI-generated · Qwen 3.6 · methodology

Vitamin C and citrus bioflavonoids have strong evidence for supporting immune function and antioxidant activity. Grape seed extract and rutin provide additional antioxidant support, though research on their individual efficacy in supplements is more limited. The formula maintains a high safety profile for general use.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for Optimum-C Formula
Open Full PDF View on NIH DSLD →
Details

Label Data

2 Capsule(s)
Serving Size
90
Servings
Other Combinations
Product Type
29%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Vitamin C
1000 mg (1111% DV)
Calcium
94 mg (7% DV)
Market median: 500.0mg (283 products) 174 studies (A:0, B:62)
Market median: 100.0mg (284 products) 10 studies (A:0, B:4)
50 mg
Market median: 500.0mg (19 products)
Acerola
10 mg
Rose Hips
10 mg

Other Ingredients

Hypromellose Water, Purified Magnesium Stearate
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Directions: As a dietary supplement, take two capsules once daily or as directed by a healthcare practitioner.

Warnings & Precautions

Caution: For adults only.

Consult physician if pregnant/nursing, taking medication, or have a medical condition.

Keep out of reach of children.

Formulation Notes

Bluebonnet's Optimum-C Formula Vegetable Capsules are formulated with non-GMO, identity-preserved (IP) vitamin C from calcium ascorbate, rose hips and acerola along with citrus bioflavonoids and grape seed extract to help support immune function.

May support Immune health

Free of milk, egg, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans and sesame. Also free of gluten, barley, rice, sodium and sugar.

Minerals are shown in their elemental value.

Bluebonnet's KOF-K Certification #K-0000700

Made with non GMO ingredients

Immune health

Vegan

K Parve (Kosher)

Gluten free

Additional Information

K Parve (Kosher)

Made with non GMO ingredients

Metadata

Product Details

UPC / SKU7 43715 00533 4
DSLD Entry Date2023-01-23
Product TypeOther Combinations
FormCapsule
DSLD ID279643
Data Updated2026-04-11
Research

Research Evidence

371
Research Sources
54
Avg Quality
148
Meta Analysis
82
Systematic Review
71
Rct
62
Clinical Trial
2
Regulatory Source
1
Cochrane Review
1
Narrative Review
1
Other
1
Openfda Safety
A Vitamin C supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015 PubMed DOI
A Vitamin C supplementation for the primary prevention of cardiovascular disease
Systematic Review The Cochrane database of systematic reviews 2017 PubMed DOI
A Vitamin C for preventing and treating the common cold
Meta Analysis The Cochrane database of systematic reviews 2013 PubMed DOI
A Vitamin C for preventing and treating pneumonia
Meta Analysis The Cochrane database of systematic reviews 2013 PubMed DOI
A Vitamin E supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015 PubMed DOI
A Vitamin C supplementation for prevention and treatment of pneumonia
Meta Analysis The Cochrane database of systematic reviews 2020 PubMed DOI
A Vitamin C supplementation for prevention and treatment of pneumonia
Systematic Review The Cochrane database of systematic reviews 2021 PubMed DOI
A Nutritional interventions for preventing and treating pressure ulcers
Meta Analysis The Cochrane database of systematic reviews 2024 PubMed DOI
A Does Vitamin C Supplementation Provide a Protective Effect in Periodontal Health? A Systematic Review and Meta-Analysis
Meta Analysis International journal of molecular sciences 2024 PubMed DOI
A Circulating vitamin C concentration and risk of cancers: a Mendelian randomization study
Meta Analysis BMC medicine 2021 PubMed DOI
View all evidence for Vitamin C →
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.