Confectioners shellac, sometimes labeled “confectioner’s glaze” or “candy glaze,” is a glossy coating made from a resin secreted by the female lac bug. It’s the same substance that gives jelly beans, chocolate-covered nuts, and seasonal candy their smooth, shiny finish. If you’ve eaten a coated candy, a polished apple, or swallowed a coated pill, you’ve almost certainly consumed shellac.
Where Shellac Comes From
The lac bug is a tiny insect in the Kerriidae family that feeds on tree sap in parts of India and Southeast Asia. As the female feeds, she secretes a sticky resin that hardens around tree branches, forming a protective shell for her larvae. Harvesters scrape this hardened resin from the bark, then filter, heat, and refine it into thin, amber-colored flakes. In food contexts, those flakes are dissolved in ethyl alcohol to create a liquid coating that can be sprayed or brushed onto products.
The refining process matters for the final product. Raw scraped resin, called “seedlac,” gets mixed with ethyl alcohol in a dissolving tank, refluxed for about an hour, and filtered to remove debris. From there, manufacturers can produce wax-containing or dewaxed versions. Dewaxed shellac goes through additional filtration presses before being dried into flakes. A decolorized version also exists, processed further to remove the natural amber tint.
How It’s Used in Food and Medicine
In confectionery, shellac works as a glazing agent. It creates a moisture barrier that keeps candy from getting sticky, protects chocolate from melting on your fingers, and adds the glossy sheen consumers expect. The European Food Safety Authority lists it as additive E904, approved for use on cocoa and chocolate products, chewing gum, breath fresheners, candy decorations, and coatings. Between 2019 and mid-2024, shellac appeared on the labels of over 3,000 products tracked by the Mintel database, including individually wrapped chocolates, mixed assortments, mints, and seasonal chocolate.
Fresh fruit is another common application. Shellac is approved as a surface treatment for citrus fruit, apples, pears, peaches, pineapples, pomegranates, mangoes, avocados, papayas, and melons. That waxy shine on a supermarket apple may well be shellac. It’s also used as a glazing agent on nuts.
In pharmaceuticals, shellac serves a more functional role. It provides an enteric coating for tablets and capsules, meaning it resists stomach acid so the pill doesn’t dissolve until it reaches the intestines. This is useful for medications that would be destroyed by stomach acid or that need to be absorbed lower in the digestive tract. Shellac coatings also act as moisture barriers, keeping tablets more stable during storage than some synthetic alternatives, and they can mask bitter or unpleasant tastes.
Regulatory Status and Safety
The FDA classifies purified shellac as a permitted food additive and indirect food contact substance. It appears under several names in federal regulations, including “candy glaze,” “confectioner’s glaze,” “gum lac,” and “lac resin.” In Europe, the EFSA completed a re-evaluation of shellac (E904) and set a temporary acceptable daily intake of 4 mg per kilogram of body weight per day for wax-free shellac produced by physical decolorizing. For a 150-pound adult, that works out to roughly 272 mg per day. The “temporary” designation exists because the agency is waiting on new data about trace impurities in chemically bleached versions. Wax-containing shellac doesn’t yet have an established acceptable daily intake.
Allergic reactions to shellac are rare but documented. Most reported cases involve skin contact rather than ingestion: eyelid dermatitis from mascara, lip irritation from lipstick, or oral tissue reactions from shellac-containing dental mouthguards. One case report described a patient who developed a recurring lip fissure and painful mouth sores from a shellac-containing mouthguard. Skin sensitization can be confirmed through patch testing with shellac dissolved in ethanol.
Shellac and Dietary Restrictions
Because shellac is an animal-derived product, it is not vegan. The harvesting process is part of the reason: when the hardened resin is scraped from branches, lac bugs attached to it are collected and killed in the process. Rough estimates suggest around 100,000 lac bugs die to produce a single pound of shellac flakes. For anyone following a vegan diet, checking for “confectioner’s glaze” or “shellac” on ingredient labels (or looking for certified vegan logos) is the most reliable way to avoid it.
Kosher status is more nuanced. Since Jewish dietary law generally forbids both non-kosher animals and their excretions, shellac might seem prohibited. However, the widely accepted ruling from Rabbi Moshe Feinstein holds that because shellac hardens into a rock-like, inedible state before being processed back into an edible form, it qualifies as “pirshah” (excrement in an inedible form) and is permanently permitted. This distinguishes shellac from gelatin made from non-kosher bones or carmine made by crushing cochineal beetles, both of which are derived from the actual body of a forbidden animal rather than a byproduct. Major kosher certification agencies in the United States follow this ruling and certify shellac-containing products, though some individuals choose to avoid it as a stricter personal practice.
Halal rulings on shellac vary by certification body and scholarly interpretation, so checking with a specific halal authority is the most practical approach if this applies to you.
Plant-Based Alternatives
For manufacturers looking to make vegan-friendly products, two main alternatives have replaced shellac. Carnauba wax, harvested from the leaves of a Brazilian palm tree, provides a similar glossy finish and moisture barrier. Zein, a tasteless, odorless, colorless protein mechanically extracted from corn, is another option that can replicate many of shellac’s coating properties. Both are increasingly common on candy labels as consumer demand for plant-based products grows.