Vitamin C & Zinc

Vitamin C and zinc reference formula at example amounts of 1,584 mg and 0.6 mg per serving, developed as a powder or capsule.

Vitamin C & Zinc is a reference formula for brands building a two-ingredient product that pairs vitamin C with zinc, around example amounts of 1,584 mg of vitamin C and 0.6 mg of zinc per serving. The brand sets the final amounts for its market. Reference labels span vitamin C from 20 to 1,600 mg and zinc from 30 mcg to 100 mg, so the example is a starting point rather than a standard.

Powder is developed as the lead format for the example amounts, and capsule follows for brands that want a fixed unit. The development work centers on balance: a gram-level vitamin C dose is acidic and bulky, while the zinc is a few milligrams or less, so the real design choices are the ascorbate form, the zinc salt and how evenly a trace of zinc is mixed.

Ingredient Composition

IngredientPer ServingRaw Material FormAlternative Form (same amount of active)
Vitamin C1584 mg (example amount)L-ascorbic acid, specified on an ascorbic acid basis; 1,584 mg vitamin C per servingSodium, calcium or potassium ascorbate, or natural-source Acerola Cherry Extract 17–25% Natural Vitamin C or Camu Camu Extract 10–25% Natural Vitamin C, with the input set from the content
Zinc0.6 mg (600 mcg) (example amount)Zinc gluconate, specified as elemental zinc; 0.6 mg zinc per servingZinc bisglycinate, zinc picolinate or zinc oxide, with the input recalculated for the salt

Amounts are stated as mg of vitamin C on an ascorbic acid basis and mg of elemental zinc. Zinc gluconate is C12H22O14Zn, 455.7 g/mol (PubChem CID 443445), and carries one zinc atom of 65.4 g/mol (PubChem CID 23994), so 0.6 mg of zinc needs about 4.2 mg of the gluconate (0.6 × 455.7 ÷ 65.4).

Intended Benefits & Formula Rationale

This formula is designed for products positioned around immune nutrition. Vitamin C is the lead ingredient and zinc is included as the partner mineral.

Intended Benefit DirectionKey IngredientsFormulation Rationale
Immune nutritionVitamin CVitamin C is an essential micronutrient and electron donor that is a potent antioxidant and a cofactor for biosynthetic and gene regulatory enzymes, and contributes to the cellular functions of the immune system [1]. Evidence: Referenced
Zinc in cold-season productsZincA systematic review of 17 trials with 2,121 participants reports that zinc shortened the duration of cold symptoms by 1.65 days, with high heterogeneity, a shorter duration in adults but no significant effect in children, and more adverse events such as bad taste than with placebo [2]. Evidence: Mixed

The amounts are examples. The reviews in [1] and [2] cover vitamin C and zinc separately and do not test this combination, so any claim on a finished product is reviewed for each market.

Available Formats

Reference labels are spread across capsules, tablets, powders and other forms; powder and capsule are developed here.

FormatUnitPer ServingPack SizeOther Ingredients (typical)Suitability
Powder1 scoop, 4 gVitamin C 1,584 mg, zinc 0.6 mg120 g tub (30 servings)Flavor, sweetener, flow agent, optional mineral buffersLead format; drink mix
Capsule3 capsulesVitamin C 1,584 mg, zinc 0.6 mg180 capsules (60 servings)Vegetable capsule shell, flow agentFixed unit; three capsules per serving

Raw Material Input & Fill (Design Estimate)

Design estimates. Ascorbic acid and zinc gluconate are assumed at 100% purity, so 1,584 mg of vitamin C needs 1,584 mg of ascorbic acid and 0.6 mg of zinc needs about 4.2 mg of the gluconate.

FormatRaw Material Input per UnitDesign FillBalance for ExcipientsVerification Before Scale-Up
PowderAscorbic acid 1,584 mg, zinc gluconate 4.2 mg per scoop4 g per scoopabout 2,412 mgZinc distribution in a 4 g scoop, dissolution, acidity and taste, moisture uptake
CapsulePer capsule: ascorbic acid 528 mg, zinc gluconate 1.4 mg560 mg per capsuleabout 31 mgContent uniformity of the zinc trace, capsule weight spread, assay of vitamin C

Tablet, liquid and gummy are separate projects, because 1.6 g of vitamin C per serving changes compression, taste and stability work in those systems.

Formulation Considerations

Zinc trace in a vitamin C bulk. At 0.6 mg of zinc against 1.6 g of vitamin C, the zinc is a trace that has to be premixed and spread evenly. Geometric dilution, particle size control and a zinc assay on units from the start and end of the run are part of the pilot run.
Acidity and taste. A gram-level dose of ascorbic acid is sour, and in a capsule it can attack some shell types. Buffered ascorbates or a mineral-buffered blend soften the acid, and the reference label lists potassium, calcium and magnesium alongside the vitamin C for that reason.
Zinc form and taste. Zinc gluconate has a metallic aftertaste at higher levels. At 0.6 mg it is easy to cover; if the brand moves to 15 mg or more, the salt choice and the flavor system are tested again.
Moisture and color. Ascorbic acid oxidizes and darkens in a humid environment. A desiccant, an oxygen-barrier pack and low-humidity filling are part of the plan.

Customization Options

Brands adjust the amounts, the ascorbate and zinc forms, the format and the add-ons.

ParameterRangeNote
Vitamin C per serving500, 1000 or 1584 mgExamples for the brand; unit count or scoop size follows the amount
Zinc per serving0.6, 5, 15 or 30 mgExamples for the brand; salt weight added to the input
Vitamin C formAscorbic acid, buffered ascorbates or natural extractsChanges the input and the acidity
Zinc formGluconate, bisglycinate, picolinate or oxideDifferent salt weights
FormatPowder or capsuleTablet, liquid and gummy are separate projects
Add-onsVitamin D, elderberryA third active changes the unit weight and the stability plan

The pilot run confirms zinc uniformity across the run, vitamin C assay after a short humidity hold, and the taste of the scoop in water.

Flavor Options

FormatSuggested FlavorsWhy
PowderOrange, lemon, mixed berryCitrus and berry flavors suit a vitamin C base

Technical Status & Data Sources

ItemStatusDetails
Reference formulaNIH DSLDThe ingredient and amount come from a labeled product in the NIH DSLD (Vitamin C 1584 mg + Zinc 600 mcg on the label of CF021311, which also lists potassium, calcium and magnesium; example DSLD labels 240950, 240951). The label names the two ingredients by name; the ascorbic acid and zinc gluconate forms are set in formulation.
SpecificationSet in formulationAscorbic acid at 1,584 mg and zinc as gluconate at 0.6 mg elemental zinc per serving; assays, moisture, microbial and heavy-metal limits and method are fixed with the supplier. Unit size, fill weight and stability are set in formulation.
Data sourceNIH DSLDDSLD v9.4.0, downloaded 2026-01-10: 50,824 reference formulas merged from on-market labels with complete ingredient amounts. Counts show how labels are distributed.
Market reviewPer marketDose limits, labeling and claims are reviewed for each sales market before a finished product is developed.
ReferencesSources[1] Carr AC, Maggini S. Vitamin C and Immune Function. Nutrients. 2017;9(11):1211. DOI · PubMed<br>[2] Science M, Johnstone J, Roth DE, et al. Zinc for the treatment of the common cold: a systematic review and meta-analysis of randomized controlled trials. CMAJ. 2012;184(10):E551-61. DOI · PubMed

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