A gummy specification should define the decision—not just describe the product.

Fiber gummy specifications: ingredient weight is not the label amount

A fiber gummy quote may describe the mass of a supplied carbohydrate ingredient, an analytical result or a proposed dietary-fiber declaration. Keep these as separate fields. Start with the exact material name, grade and supplier specification, then state ingredient quantity per gummy and per serving alongside the number of gummies per serving.

FDA explains that analytical methods cannot distinguish all non-digestible carbohydrates that meet its dietary-fiber definition from those that do not. Where both are present, ingredient records support the declaration alongside test results. Request a documented basis; a supplier headline is not label approval. See FDA's dietary-fiber questions and answers.

A fictional quote-reading exercise

These invented figures demonstrate a specification check. They are not a recommended serving, an achievable formula or a supplier offer.

Both describe the same supplied-ingredient mass, but neither establishes the declared dietary-fiber amount or makes the materials interchangeable. Check the exact identity, grade and documentation before treating the quotes as equivalent.

If the two-gummy serving weighs 6,000 mg, that ingredient represents 1,200 ÷ 6,000 = 20% of serving mass. This is bookkeeping, not proof of process feasibility, texture, finished-product recovery or stability. The rest of the mass is not automatically available formula space.

The preceding exercise compares supplied-ingredient mass. The next is separate: it starts from non-digestible carbohydrate amounts and asks which qualify for the declaration.

Which fiber can count toward the declaration?

Two quotes can both promise "3 g of fiber per serving" and still support different Dietary Fiber declarations. FDA's definition gives more than one route, and each needs support for the actual material.

1. Intrinsic and intact in plants. Non-digestible carbohydrates (with three or more monomeric units) and lignin that are intrinsic and intact in plants meet the definition. How far a plant material can be processed and still be treated as intrinsic and intact is a separate question for review.
2. Isolated or synthetic, named in the regulation. FDA's regulation lists seven: beta-glucan soluble fiber as described in 101.81(c)(2)(ii)(A), psyllium husk as described in 101.81(c)(2)(ii)(B)(1), cellulose, guar gum, pectin, locust bean gum and hydroxypropylmethylcellulose (21 CFR 101.9(c)(6)(i)).
3. Isolated or synthetic, covered by enforcement discretion. FDA has said it intends to propose adding further fibers, including inulin and inulin-type fructans, polydextrose, resistant maltodextrin/dextrin, galactooligosaccharide, glucomannan and acacia gum. Until that rulemaking is complete, it intends to allow them in the Dietary Fiber declaration (FDA dietary fiber questions and answers).

A non-digestible carbohydrate that is not established under any of these routes is not included in Dietary Fiber. FDA's Q&A states that one that is only the subject of a pending petition is not included, but still counts in Total Carbohydrate.

Naming a fiber on a list is not the same as knowing how much qualifying fiber an ingredient supplies. A pectin-containing raw material, for example, needs composition data before any of its mass is counted.

A fictional classification exercise

The amounts below are invented. The rows describe non-digestible carbohydrate amounts, not raw-ingredient weights. The first two amounts are assumed to be established qualifying-fiber contents. The third amount is assumed to meet none of the routes above and to fall outside any enforcement-discretion coverage.

The quote's 3.0 g and a 2 g declaration can describe the same serving. Dietary Fiber is declared to the nearest gram. When a product contains a mixture of dietary fiber and an added non-digestible carbohydrate that does not meet the definition, the regulation requires the manufacturer to make and keep records verifying the declared amount.

FDA's positions on individual fibers can change. Confirm the current status and how it applies to your materials with your regulatory reviewer. This exercise does not approve a label or support a health claim.

Add these distinctions to the acceptance matrix

• Material and quantity: name, grade, supplier specification/revision and mass per piece and serving.
• Declaration basis: proposed dietary-fiber amount and supporting records, kept separate from input mass.
• Fiber eligibility: for each non-digestible carbohydrate in the formula, including the gelling agent, the route it relies on—intrinsic and intact, named in 21 CFR 101.9(c)(6)(i), covered by FDA enforcement discretion, or not established—plus the composition data and records that support the qualifying amount.
• Test scope: identified ingredient or finished-gummy sample, method, units and report scope.
• Development scope: formula-system assumptions, proposed package and storage conditions, with evidence tied to that combination.

Mark missing values “not provided,” not zero. If the project includes live microorganisms, keep the strain and count/time-point questions from the probiotic gummy page separate: carbohydrate mass does not establish a viable microbial count, and CFU does not establish a fiber declaration. Use the formula-space worksheet to reconcile quantities, not to certify manufacturability.

Use the fiber gummy project outline to compare ingredient mass, qualifying-fiber basis and serving assumptions before submitting non-confidential specifications.

Discuss Non-Confidential Specification Questions

Check nutrient amounts against the named source

Check the stated mineral percentage and the contribution of each source before comparing the proposals.

Compare a stated magnesium percentage with the compound it names

A specification that names magnesium glycinate and states a magnesium percentage gives you a simple consistency check before any quote comparison. It is a theoretical composition check, not a test that identifies the material.

Pure, anhydrous magnesium glycinate (magnesium bisglycinate, C4H8MgN2O4, molecular weight 172.42; PubChem CID 84645) is about 14.1% magnesium by mass. For comparison, magnesium oxide is about 60.3% magnesium (PubChem CID 14792).

Mass balance explains why a stated figure can move away from 14.1%. Water, or any diluent that contains no magnesium, lowers the magnesium fraction. Another magnesium-containing component can raise it. A figure that is materially inconsistent with the pure anhydrous compound is therefore a reason to ask questions about:

• Identity: what the material actually consists of, and which records describe its composition.
• Reporting basis: whether the percentage is stated as supplied, on an anhydrous basis or on a dry basis.
• Rounding and uncertainty: how the figure was determined and how precise it is.
• Other ingredients: whether any other magnesium source, carrier or diluent is present.

A number slightly above or below 14.1% is not, on its own, evidence of blending or misrepresentation.

A fictional two-compound exercise

A specification states 20% magnesium for a material called magnesium glycinate. For arithmetic only, assume the material contains nothing but pure anhydrous magnesium glycinate and pure magnesium oxide.

Under that model, about 13% of the material would be magnesium oxide, supplying about 38% of the magnesium. The exercise rules out only the model of a pure anhydrous magnesium glycinate at 20%. It does not identify what a real material contains.

Composition also affects how sources are named. If a Supplement Facts panel identifies source ingredients and more than one supplies the same nutrient, all of those sources are listed in descending order of weight; source ingredients not identified in the panel belong in the ingredient statement (21 CFR 101.36(d)). Confirm label wording with your regulatory reviewer.

Are these electrolyte gummy proposals describing the same product?

Before comparing prices, separate the product concept from the evidence supplied for it. An "electrolyte blend" heading and a "creatine plus mineral blend" heading do not establish the same scope, and neither tells you what each named constituent contributes per serving.

Use three review outcomes: needs clarification, different concepts, or ready for a like-for-like price comparison. The last outcome concerns the agreed comparison scope, not manufacturing feasibility, product quality or a health claim.

When one salt supplies two nutrient fields

Suppose, for this example, a proposal lists 200 mg potassium chloride and 150 mg sodium chloride per serving and no other source of these minerals. The figures are invented and use the theoretical composition of anhydrous salts, not a supplier assay or a recommended amount. The displayed results are rounded to 0.1 mg for this exercise, before any regulatory label-rounding decision.

Chloride comes from both salts, so its amount is the sum of two contributions. A headline of "350 mg electrolytes" does not show that split, and a different pair of salts with the same total would give different nutrient amounts. With salts such as citrates, the anion is not itself a nutrient with a Daily Value, so the nutrient amounts add up to less than the salt mass. In practice, use the composition in each supplier's specification; hydrates and assay values change the numbers.

How a blend heading relates to the label

A proprietary blend heading does not override the rules for nutrients. On a Supplement Facts panel, nutrients such as sodium, potassium and calcium are handled under FDA's rules for dietary ingredients with a Daily Value, including the provisions for amounts that can be declared as zero and are not listed; their declared amount is the weight of the nutrient, not its source (21 CFR 101.36(b)(2) and (c)(1)). Whether a particular mineral line appears depends on those rules and the actual serving amount. Treat the allocation above as a specification check, and confirm label decisions with your regulatory reviewer.

Related decision: amino acid and protein declarations.

Record for each proposal

• Agreed concept scope, including whether creatine is included, excluded or unresolved.
• Full serving and piece basis; each named constituent and nutrient on its stated units and basis. Mark unresolved fields as unresolved, not zero.
• Each source salt, its composition basis, and which nutrient fields it contributes to.
• Whether each amount is a requested target, a supplier proposal or a measured result; for a result, the test object and document.
• Packaging and other quote-scope differences that still prevent a like-for-like comparison.

Once clarified, keep genuinely different concepts in separate comparisons. If the scope matches and the fields are resolved, move to the quote comparison worksheet. None of this establishes a dose, a hydration benefit or a compliant label.