Home/ Supplements/ Vitamin C/ Sustained Release Vita-C 500

Sustained Release Vita-C 500

product on market Tablet or Pill Shaklee Safety: 90/100
90/100

This product looks safe

  • Contains proprietary blend — exact ingredient amounts not disclosed
  • 33% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

AI-generated · Qwen 3.6 · methodology

Vitamin C is supported by strong evidence for its role in immune function and antioxidant protection. The inclusion of rose hips and bioflavonoids provides complementary nutrients, though research on their synergistic effects is more limited. This profile focuses on foundational antioxidant support with a high safety rating.

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

Alerts

Safety Alerts

Contains proprietary blend — exact ingredient amounts not disclosed

Label

Product Label

Label for Sustained Release Vita-C 500
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Tablet(s)
Serving Size
180
Servings
Other Combinations
Product Type
33%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Total Carbohydrates
1 Gram(s) (1% DV)
Vitamin C
500 mg (556% DV)
Market median: 500.0mg (283 products) 174 studies (A:0, B:62)

Other Ingredients

Dicalcium Phosphate Microcrystalline Cellulose Hydroxypropyl Methylcellulose Grapefruit Oil
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Directions: Take 1 tablet daily.

Warnings & Precautions

Seal under cap for your protection.

Manufactured in a facility that may also process tree nuts, peanuts, milk, soy, wheat, sesame, shellfish, and fish.

Formulation Notes

Cellular Antioxidant & Immune Protection A proprietary, plant-based, sustained-release delivery system helps protect cells & enhances immune function.

GF Gluten Free

Kosher

100% Carbon Neutral

No artificial flavors, sweeteners, colors, or preservatives

Clinically shown to raise blood levels of vitamin C for up to 12 hours

Star-K (Kosher)

Vitamin C isn't manufactured or stored in the body & must be continually replenished through diet.

Additional Information

Star-K (Kosher)

Dr Shaklee

Metadata

Product Details

DSLD Entry Date2023-12-14
Product TypeOther Combinations
FormTablet or Pill
BrandShaklee
DSLD ID301172
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.