Gluten-free bread is built from a combination of alternative flours, starches, binding agents, and leaveners that together try to replicate what gluten does naturally in wheat bread: create structure, trap air, and produce a soft, springy crumb. The specific ingredients vary between brands and recipes, but most gluten-free breads share a common blueprint.
The Flour Base
Where traditional bread starts with wheat flour, gluten-free bread swaps in one or more alternative flours. Rice flour (both white and brown) is the most common foundation, appearing in the majority of commercial loaves. Other grain-based options include sorghum, which contains high levels of anthocyanins (the same antioxidant found in blueberries), and millet, a nutrient-dense grain that performs well in blends.
Many recipes also use pseudocereals like buckwheat, amaranth, and quinoa. Despite its name, buckwheat is not related to wheat at all. It’s botanically part of the rhubarb family and is naturally gluten-free. These pseudocereals add protein, flavor complexity, and a slightly denser texture compared to rice-based flours.
For people avoiding grains entirely, nut flours step in. Almond flour is the most popular, often paired with coconut flour and tapioca starch to create a grain-free loaf. Virtually any nut can be ground into flour, including hazelnut and walnut, though almond dominates commercial products.
Starches That Build Texture
Flour alone doesn’t produce good gluten-free bread. Starches play a critical role in creating the soft, airy crumb that makes bread feel like bread. The most commonly used are potato starch, tapioca starch, and corn starch, often blended with the flour base.
Not all starches perform equally. Research published in the journal Foods found that potato starch produced the best crumb structure and loaf volume among gluten-free options, though it also made bread slightly firmer. Corn starch tended to create large, uneven holes in the crumb. Rice starch and tapioca starch performed poorly on their own, producing irregular structures, but they work better when blended with other starches and binders. The size of the starch granules turned out to have the biggest impact on final bread texture.
Binders That Replace Gluten
This is the ingredient category that does the heaviest lifting. Gluten is a protein network that stretches, traps gas, and gives bread its chew. Without it, gluten-free flours need reinforcement. Three binders show up most often.
Xanthan gum is the most widely used. It strengthens the weak protein networks in gluten-free flours and makes them more elastic. America’s Test Kitchen describes it as essentially adding glue to the proteins in gluten-free flour. You’ll see it on nearly every commercial gluten-free bread label, typically in small amounts (a teaspoon or less per loaf).
Guar gum works similarly, adding structure and thickening the dough, though it can give baked goods a slightly starchy mouthfeel.
Psyllium husk is increasingly popular, especially in artisan-style recipes. It has a higher viscosity than xanthan gum, meaning it binds water more effectively. It interacts strongly with the proteins in gluten-free flours, creating a sturdy network that can hold gas and steam during baking. This makes it particularly useful for highly leavened breads like cinnamon-raisin loaves that need enough structure to stay tall after cooling.
Leavening Agents
Gluten-free bread still needs something to make it rise. Yeast works in gluten-free dough, but the process is more finicky. Without a stretchy gluten network to trap carbon dioxide, gluten-free doughs have limited ability to expand and retain gas during proofing. This is why many gluten-free breads are denser than their wheat counterparts.
Some bakers use sourdough fermentation to improve both rise and flavor. Sourdough is one of the oldest leavening methods, relying on a natural ecosystem of wild yeasts and beneficial bacteria. The fermentation process creates organic acids that can strengthen the dough’s structure and improve shelf life. Many commercial gluten-free breads, however, simply use standard yeast or baking powder, sometimes in combination, to keep production simpler.
Commercial Additives
If you pick up a store-bought gluten-free loaf, you’ll likely see several ingredients beyond flour, starch, and binders. These additives solve specific problems that gluten-free bakers face.
Hydrocolloids like hydroxypropyl methylcellulose (often listed as HPMC or cellulose gum) replace the gas-binding properties of gluten. They interact with starch during baking, helping the dough hold its shape as it rises and sets. Emulsifiers serve a different purpose: they stabilize the gas cells in the dough by forming thin films around air bubbles, which improves volume and creates a softer crumb. Common ones include lecithin (often from soy or sunflower), sodium stearoyl lactylate, and DATEM. These emulsifiers also slow staling by preventing starch from recrystallizing after baking.
Eggs are another frequent addition in both commercial and homemade recipes. They provide protein for structure, fat for moisture, and act as a natural emulsifier. Some recipes use four or more eggs per loaf, far more than a typical wheat bread recipe.
How Nutrition Compares to Wheat Bread
Gluten-free bread has a different nutritional profile than standard wheat bread, and the differences might surprise you. Research comparing the two found that gluten-free breads contain roughly twice as much fat as their wheat-based equivalents (about 6.6 grams per 100 grams versus 1.4 to 3.0 grams). This comes partly from nut flours, added oils, and eggs that help compensate for the missing gluten.
Protein tends to be lower in gluten-free bread. Gluten itself is a protein, and wheat flour naturally contains more of it than rice or tapioca-based alternatives. Fiber content varies widely depending on the recipe. Some gluten-free breads actually contain more fiber than whole wheat bread, especially those made with psyllium husk, nut flours, or added fiber. Others, particularly those built on white rice flour and starches, contain very little.
One significant gap is in vitamins and minerals. In the UK, white wheat flour is required by law to be fortified with calcium, iron, B vitamins (thiamin and niacin). Gluten-free flours are exempt from these rules. A study of the gluten-free market found that only 5% of gluten-free breads were fortified with all four of the nutrients that are mandatory in wheat bread, and just 28% contained added calcium and iron. If gluten-free bread is a staple in your diet, checking labels for fortification, or getting those nutrients from other sources, matters.
Blood Sugar Effects
Gluten-free bread generally raises blood sugar more than whole grain wheat bread. A systematic review found that about 61% of gluten-free bread samples tested had a high glycemic index, meaning they cause a rapid spike in blood glucose. Only 18% qualified as low glycemic. Some commercial gluten-free breads tested at a glycemic index above 100, which is higher than pure white bread.
This happens because many gluten-free breads rely heavily on refined starches and white rice flour, which are quickly digested. Whole-grain gluten-free breads performed somewhat better, with several samples landing in the medium glycemic range (60s to low 70s). If blood sugar management is a concern, choosing gluten-free bread made with whole grain flours, nuts, or seeds, and checking that fiber content is at least 3 to 4 grams per serving, can help blunt the spike.