At KorNutra, we engineer gummy supplements with precision, understanding that even a targeted 30% reduction in sugar triggers a cascade of interconnected changes in the production system. Sugar is a foundational structural component, a humectant, and a preservative. When you pull that much sugar from a formula, the second-order effects ripple through texture, drying, and stability in ways that demand careful rebalancing.
Texture: From Structure to Collapse
Sugar provides the bulk and the glassy matrix that gives gummies their characteristic chew. Removing 30% of it reduces the total dissolved solids, weakening the gel network. In most gummy formulas, that sugar is split between sucrose and a corn or glucose syrup, and the syrup does much of the moisture-holding work, so the cut lands hardest on humectancy. The immediate second-order effect is often a softer, less resilient texture that can become sticky or overly elastic. If the sugar is simply omitted without a bulking replacement, the gummy may collapse or fail to set properly. Even with a high-intensity sweetener to restore sweetness, the missing mass leaves voids in the gel, leading to a coarse, crumbly mouthfeel. At KorNutra, we counter this by using a blend of fibers or polyols to rebuild the matrix, but achieving the original snap and release requires iterative adjustment of the gelling agent ratio and cooking profile.
Drying Time: A Race Against Moisture Migration
Sugar is strongly hygroscopic, binding water and slowing moisture loss during the drying phase. A 30% reduction lowers the formulation’s water-holding capacity, so the product initially dries faster as water evaporates more readily from the surface. However, this can create a deceptive “dry skin” effect: the exterior sets quickly while the interior remains overly moist. The result is a longer total equilibration time and a risk of case hardening. Paradoxically, the drying room parameters must be dialed down to a lower temperature and higher humidity to prevent the surface from locking moisture inside, which would otherwise lead to sweating and deformation later.
Microbial Stability: The Water Activity Awakening
This is where the least obvious but most critical shift occurs. Sugar depresses water activity (aw), directly inhibiting the growth of yeasts, molds, and bacteria. Remove 30% of the sugar, and the water activity rises sharply, often from a safe 0.60-0.65 into the danger zone above 0.70, where spoilage organisms can thrive. The formulation’s intrinsic preservation is compromised, and you cannot always rely on pH or natural inhibitors alone. As a second-order consequence, the shelf life shrinks unless you reformulate with alternative humectants like glycerin or erythritol that maintain aw, or you adjust the packaging to include desiccants and oxygen scavengers. At KorNutra, every sugar-reduction project prompts a full revalidation of microbial challenge studies to guarantee stability without over-preservation.
Label claims: the 25% threshold and the supplement exception
A 30% cut does not automatically buy a “reduced sugar” claim on the finished pack. Under 21 CFR 101.60(b)(5), “reduced sugar,” “lower sugar,” and the other relative sugar claims require at least 25% less sugar per reference amount than an appropriate reference food, with the reference food and the percentage difference declared next to the claim. A 30% reduction clears that bar for a conventional food, but the same provision excepts vitamin and mineral dietary supplements from those claims. A gummy multivitamin cut to 30% less sugar cannot carry “reduced sugar” on the front of the panel under that rule, even though the math exceeds the threshold.
The panel itself changes with the reformulation. Added sugars must be declared on the Supplement Facts label (21 CFR 101.36(b)(2)(i)), so cutting sucrose and corn syrup lowers that entry, and sugar alcohols such as erythritol or xylitol must be declared when the label makes a claim about them. Before a brand locks a formula at 30%, the label and claims review belongs in the same project plan as the texture and stability work, so the product launches with a panel the finished formula actually supports.
In practice, these three formulation factors are not independent; they form a tight loop. Changing texture influences drying uniformity, which in turn alters the final water activity and microbial risk. That’s why at KorNutra we treat sugar reduction as a full reformulation that must preserve the entire product experience and safety profile.