Rice malt syrup (also called brown rice syrup) is made from rice, which is naturally gluten free, but the finished product may not be safe for people with celiac disease or gluten sensitivity. The reason comes down to how it’s manufactured: some producers use barley-derived enzymes to break down the rice starch into sugar, which can introduce gluten into the final product. Whether your rice malt syrup is truly gluten free depends entirely on the enzymes used and how the product is labeled.
To complicate things further, the word “malt” on its own almost always means barley malt, which contains gluten. So the answer changes depending on whether you’re asking about rice malt syrup specifically or malt in general.
Why “Malt” Is a Red Flag on Labels
Malt, malt flavoring, malt extract, and malt syrup are typically made from barley, a gluten-containing grain. The FDA does not allow any of these barley-derived ingredients in foods labeled “gluten-free” because they have not been processed to remove gluten. If you see the word “malt” on an ingredient list without a qualifier like “rice,” assume it comes from barley and avoid it.
This rule applies broadly. Malt vinegar, barley malt extract, and malt syrup are all barley-based by default and cannot legally carry a gluten-free claim in the United States. Products that list these ingredients and still claim to be gluten free are incorrectly labeled.
Rice Malt Syrup Is Different, but Not Always Safe
Rice malt syrup starts with rice, not barley. Manufacturers cook rice and then add enzymes to convert the starch into simpler sugars, creating a thick, amber-colored sweetener. The critical question is where those enzymes come from.
Some manufacturers use enzymes derived from barley to break down the rice starch. The National Celiac Association notes that past testing of barley-derived enzymes and products made with them found gluten levels below 5 parts per million (ppm), which is well under the FDA’s 20 ppm threshold for gluten-free labeling. That sounds reassuring, but the Celiac Disease Foundation still flags brown rice syrup as a product that “may be made with barley enzymes,” placing it in a gray area for people who need strict gluten avoidance.
Other manufacturers use microbial enzymes or enzymes from non-gluten sources, which eliminates the barley concern entirely. These versions of rice malt syrup are genuinely gluten free.
How to Tell Which Version You’re Buying
The safest approach is to look for rice malt syrup that is explicitly labeled “gluten-free” or “certified gluten-free.” Under FDA rules, a product carrying that claim must contain less than 20 ppm of gluten. A manufacturer using barley enzymes would need to verify their product meets that threshold, while one using non-barley enzymes wouldn’t have the issue at all.
If the label doesn’t say gluten free, you have a few options:
- Check the ingredient list. Some brands will note “barley enzyme” or “barley malt enzyme” as an ingredient or processing aid. If you see any reference to barley, treat it as potentially containing gluten.
- Contact the manufacturer. Ask what type of enzyme they use in production. Companies that use microbial or fungal enzymes can usually confirm this quickly.
- Choose certified brands. Third-party gluten-free certification programs (like GFCO) test products independently, which removes the guesswork.
Rice Malt vs. Barley Malt: A Quick Comparison
These two sweeteners share the word “malt” but have very different gluten profiles:
- Barley malt syrup/extract: Made from germinated barley. Always contains gluten. Cannot be used in any product labeled gluten free under FDA rules.
- Rice malt syrup: Made from rice. Naturally gluten free unless barley-derived enzymes were used in processing. Can be labeled gluten free if it tests below 20 ppm.
When a product simply lists “malt” without specifying rice, it almost certainly means barley malt. Don’t assume it’s rice-based unless the label says so.
The Bottom Line for Celiac and Gluten Sensitivity
Pure rice malt syrup made with non-barley enzymes is gluten free and safe. The risk comes from products that use barley enzymes during manufacturing or from confusing rice malt syrup with barley malt, which is never gluten free. If you have celiac disease or significant gluten sensitivity, stick with brands that carry a gluten-free label or certification. The small amount of extra scrutiny at the store saves you from reacting to a sweetener that should, in theory, be perfectly safe.