Vitamin C Ascorbic Acid for Immune, Skin and Antioxidant Formulas

Ascorbic acid is used in supplements primarily for immune support, antioxidant protection, collagen synthesis and enhanced iron absorption. As Vitamin C, it is a standard component of immune formulas, multivitamins, skin and beauty products, prenatal supplements and sports nutrition. It also acts as an antioxidant to protect other ingredients in finished formulations. For B2B manufacturers, ascorbic acid is a workhorse vitamin because of its broad regulatory acceptance, clean-label profile and compatibility with tablets, effervescent tablets, capsules, gummies, sachets and powder blends. Purecium supplies it as fine powder and direct-compression granular so formulators can match the physical form to their production line.

The chemical identity is identical; the difference is physical form and processing behavior. Fine powder blends easily into capsules, sachets, coated tablets and dry powder mixes, but its cohesiveness can reduce flow on high-speed tableting lines. Direct-compression granular is engineered for free-flowing, low-dust handling and compactability, allowing tablets to be produced without a separate wet-granulation step, which reduces excipient load and simplifies label declarations. Granular grades are also preferred for effervescent tablets, where moisture control and uniform distribution matter. The choice depends on your tableting or encapsulation equipment, target tablet weight and the 'other ingredients' section of your label. Purecium supplies both forms at 99% minimum assay with controlled particle-size profiles.

Purecium Ascorbic Acid is produced by the two-step microbial fermentation route that dominates modern commercial vitamin C manufacturing. D-glucose is hydrogenated to D-sorbitol, a first fermentation oxidizes it to L-sorbose, a second fermentation converts L-sorbose to 2-keto-L-gulonic acid, and chemical enolization and lactonization yield L-ascorbic acid. The molecule is identical to ascorbic acid made by any other route, but the fermentation route uses no chemical oxidation of the final molecule and is non-GMO. Buyers who require a non-GMO statement, vegan certification or a fermentation-sourced declaration can be supported with the appropriate documentation.

USP-grade ascorbic acid is specified at 99.0-100.5% assay by HPLC, with loss on drying not more than 0.4%, residue on ignition not more than 0.1%, heavy metals within monograph limits (typically not more than 10 ppm as lead by the heavy-metals test) and total aerobic microbial count within USP/EP limits. Residual solvents, when tested, conform to USP/EP thresholds. Purecium reports all of these on the batch Certificate of Analysis, including the assay method, the reported percentage, production date and expiry date. Buyers should always request the current CoA and confirm the specification matches their internal raw-material standard before approval.

Ascorbic acid degrades primarily by oxidative and hydrolytic pathways that are accelerated by moisture, heat, light, alkaline pH and trace metals such as iron and copper. Degradation produces colored by-products, which is why vitamin C tablets can darken over time. Managing stability starts with the raw material: low moisture, sealed packaging and cool, dry storage below 25 degrees Celsius. In finished products, use moisture-barrier packaging, minimize exposure to metals during processing, keep pH in the acidic range, and consider coating or microencapsulation for sensitive formats. The granular form is generally more robust in direct-compression tableting because it reduces dust and moisture pickup. Accelerated and real-time stability studies should always be run on the finished formulation rather than the raw ingredient alone.

Yes, ascorbic acid is one of the most common actives in effervescent vitamin C tablets. The granular form is preferred because it flows well, blends uniformly with the effervescent base (typically sodium bicarbonate and citric or malic acid) and tolerates the compression forces required. The key challenges are moisture control, since the effervescent system is highly hygroscopic, and the choice of acid partner, since ascorbic acid itself is acidic. Manufacturing should be carried out in low-humidity environments with moisture-barrier packaging, and the formulation should be optimized so the finished tablet disintegrates cleanly without premature reaction. Purecium can provide the granular grade and technical guidance for effervescent development.

They are three different forms of vitamin C with different formulation roles. Ascorbic acid is the free acid form with an acidic pH, best suited to dry formats and products where acidity is acceptable. Sodium ascorbate is the buffered mineral salt, less acidic and gentler on the stomach, often used in chewables, liquids and high-dose formulas. Ascorbyl palmitate is the fat-soluble ester of ascorbic acid with palmitic acid, used in oil-based systems, softgels and cosmetics where lipid-phase antioxidant activity is needed. All three deliver vitamin C activity but differ in solubility, pH, stability and label position. Purecium supplies ascorbic acid powder and granular, and can advise on which form fits a specific product concept.

A professional supplier should provide a current specification sheet, a batch-specific Certificate of Analysis showing identification, HPLC assay, loss on drying, residue on ignition, heavy metals and microbial results, an SDS, allergen and gluten statements, and non-GMO declarations. Depending on your destination market, also request Kosher and Halal certificates, copies of the ISO 9001 and FSSC 22000 certificates, and stability data for registration purposes. Before approving a lot, verify the assay method (HPLC per USP-NF or EP), the reported assay percentage, the production date and the expiry window. Purecium provides this full documentation set on request for every shipment.

Yes. Purecium Ascorbic Acid is produced by fermentation from non-GMO starting materials and contains no gluten-containing ingredients and no major allergens. The manufacturing facility follows allergen-control procedures, and allergen-free and gluten-free statements are provided with each shipment. Because the starting materials are plant-derived glucose and the process is fermentation-based, the product is suitable for vegan labeling, and the non-GMO declaration and vegan statement can be supplied with the batch documentation. Buyers should request these statements per lot, because they must be documented for finished-product labeling in most regulated markets.

The minimum order quantity is 25 kg per specification. Both powder and granular grades are packed in 25 kg drums with food-grade aluminum-foil inner bags, and samples and technical documentation are available before you commit. Standard production lead time is typically 7 to 15 working days after order confirmation, depending on the specification and production schedule, with faster dispatch for stocked items. For North American customers, Purecium holds inventory at its US warehouse, enabling pickup or delivery within approximately two days. Export documentation, including the Certificate of Analysis, packing list and certificate of origin, is prepared for every shipment.

Yes, these are classic combinations. Ascorbic acid enhances the absorption of non-heme iron, which is why iron supplements and prenatal formulas routinely pair the two; the recommended ratio in many finished products is roughly 1:4 to 1:10 iron to vitamin C. Zinc is a common immune-support partner, and citrus bioflavonoids are frequently co-formulated with vitamin C in 'whole-food' style immune products. Formulators should verify ingredient compatibility, particle-size matching and blend stability, protect iron and vitamin C from oxidative interaction through proper excipients and packaging, and confirm that all label claims comply with destination-market regulations. Purecium can supply blending guidance and technical documentation for these combinations.

Purecium Ascorbic Acid conforms to USP, EP and FCC monographs, which define identity, assay, related substances, residual solvents, heavy metals and microbial limits, and it is produced under ISO 9001 and FSSC 22000 certified quality systems with Kosher and Halal certification. For regulatory positioning, vitamin C has GRAS status in the United States for use in foods and is an authorized vitamin for food supplements in the European Union, with a tolerable upper intake level established by EFSA; other markets apply their own rules, and maximum permitted dosages differ between jurisdictions. B2B buyers should verify per-market dosage limits before finalizing label strength. Purecium provides regulatory-support documents to assist with submissions.

Purecium supplies ascorbic acid fine powder with a typical particle size that passes 80 mesh, and direct-compression granular with a controlled distribution in the range of 20 to 60 mesh designed for free-flowing tableting. Custom mesh sizing can be arranged for specific tableting or encapsulation lines, and the particle-size distribution is reported on the CoA. The right particle profile matters because it affects blend uniformity, flow, dust generation and tablet hardness. For high-speed rotary presses, the granular grade is usually preferred; for capsules and sachets, the fine powder is the standard choice. Contact Purecium with your target format and equipment type for a recommendation.

Store ascorbic acid in tightly sealed original containers in a cool, dry place below 25 degrees Celsius, protected from light and moisture. Avoid high humidity, heat and contact with metals, which accelerate oxidative degradation. Under these conditions, shelf life is generally 24 months from the date of manufacture for both powder and granular grades. Once a container is opened, reseal it immediately after use and complete consumption within a defined period. Finished-product stability depends on the complete formulation and packaging system, so stability studies should be run on the actual product. Each shipment's CoA states the production date and expiry date for inventory planning.

Purecium supplies Ascorbic Acid as a B2B raw material for distributors, contract manufacturers, private-label producers and supplement brands, offering two forms under one account: 99% minimum fine powder and 99% minimum direct-compression granular, both produced by fermentation to USP, EP and FCC standards. Every batch is HPLC-assayed and ships with a full Certificate of Analysis, SDS and supporting documentation. The minimum order is 25 kg, inventory is staged at our US warehouse for two-day pickup, and global delivery covers Hong Kong, mainland China, the EU and beyond. For long-term supply relationships, Purecium provides consistent quality, batch traceability, regulatory documents and direct technical communication rather than one-off spot pricing.