21st Century C-1000 Prolonged Release Vitamin Supplement 110 Tablets
Analysis updated July 2026 · How Scout scores
At a glance
Summary
This vitamin supplement contains Vitamin C in the form of ascorbic acid, which is a highly bioavailable and effective form of this essential nutrient. However, the presence of additives such as maltodextrin and polyethylene glycol, along with multiple other fillers and binders, slightly detracts from its overall formulation quality. While these additives are common in supplements, they contribute to a higher level of processing, which impacts the score.
Key ingredients 11
Vitamin CVery Good
Vitamin C is an essential nutrient known for its antioxidant properties and role in immune function. Ascorbic acid is a pure form of Vitamin C, ensuring high bioavailability and effectiveness. It supports collagen synthesis and enhances iron absorption, contributing to overall health.
Benefits
Vitamin C supports immune health, acts as a powerful antioxidant, and aids in collagen production.
Hydroxypropyl MethylcelluloseNeutral
Hydroxypropyl methylcellulose is a common excipient used as a binder and to control the release of active ingredients. It is generally considered safe and does not contribute any nutritional value. Its primary role is to ensure the stability and controlled release of the supplement.
See more about Hydroxypropyl Methylcellulose →Stearic AcidNeutral
Stearic acid is a fatty acid used as a lubricant in tablet manufacturing. It is generally recognized as safe and does not affect the nutritional profile of the supplement. It helps in the smooth processing of tablets without impacting health.
See more about Stearic Acid →CelluloseNeutral
Cellulose is a plant-derived fiber used as a filler and binder in supplements. It is inert and does not provide any nutritional benefits. Its primary function is to add bulk and stability to the tablet.
See more about Cellulose →Calcium CarbonateNeutral
Calcium carbonate is used as a calcium supplement and as a filler in tablets. While it provides calcium, its bioavailability is lower compared to other forms like calcium citrate. It is primarily used to add bulk and stability to the tablet.
Risks
Excessive intake may lead to hypercalcemia or kidney stones.
Benefits
Provides a source of calcium, which is essential for bone health.
Magnesium SilicateNeutral
Magnesium silicate is used as an anti-caking agent in supplements. It is generally recognized as safe and does not contribute to the nutritional profile. Its primary role is to prevent clumping and ensure smooth processing.
Magnesium StearateNeutral
Magnesium stearate is a common lubricant used in tablet manufacturing to prevent ingredients from sticking to equipment. It is considered safe in small amounts and does not affect the nutritional value of the supplement. Its main function is to improve the manufacturing process.
See more about Magnesium Stearate →Polyethylene GlycolNeutral
Polyethylene glycol is used as a solvent and to enhance the solubility of active ingredients in supplements. It is considered safe for use in pharmaceuticals and supplements. Its primary role is to improve the consistency and absorption of the tablet.
See more about Polyethylene Glycol →Polyvinyl AlcoholNeutral
Polyvinyl alcohol is used as a film-forming agent in tablet coatings. It is generally recognized as safe and does not contribute to the nutritional profile of the supplement. Its main function is to provide a protective coating for the tablet.
See more about Polyvinyl Alcohol →SiliconNeutral
Silicon is used as an anti-caking agent in supplements to prevent clumping. It is considered safe and does not affect the nutritional value of the product. Its primary role is to ensure the smooth processing and stability of the tablet.
See more about Silicon →MaltodextrinBad
Processed additive flagged under Scout's ingredient doctrine.
Risks
May cause spikes in blood sugar levels if consumed in large amounts.
Processing
Processed Foods
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