Getting the Most from NIMA
How to sample smarter, interpret results with confidence, and understand which foods are easiest to test and which can be more challenging.
NIMA was built to give you more information when it matters most. 99% accurate at detecting gluten at 10 parts per million. Results in about 3 minutes. A tool that travels with you, fits in any bag, and works at the table, not in a lab.
But like any precision instrument, getting the most out of NIMA depends on how you use it. The science behind NIMA is reliable. But performance also depends on the sample you give it..
This guide is designed to help you understand which foods are straightforward to test, which require a modified approach, and which NIMA can't reliably test at all. We'd rather set clear expectations than leave you questioning a result that didn't seem right.
How NIMA Works: The Basics
NIMA uses lateral flow immunoassay technology, the same chemistry behind many rapid diagnostic tests. When you place a food sample into the capsule, it mixes with an extraction buffer. That buffer pulls proteins from the food into solution. The device then reads whether gliadin, the protein component of gluten that causes the immune response in people with celiac disease, is present at or above 10 parts per million.
Three things have to happen for a result to be accurate: the sample has to be the right size, it must mix evenly with the buffer, and the chemistry has to be able to work as intended. Most foods do all three without any special handling. Some foods make one or more of those steps more difficult. Because the system is designed to evaluate the strip result automatically, it is important for users to rely on the reader and not try to interpret the raw test strip lines by eye themselves. What looks like a faint pink line to the eye may still correspond to a “No Gluten Found” result..
The Foundation: Good Sampling Every Time
Before we get into specific food categories, these principles apply to every test you run.
Sample size matters. A pea-sized amount, roughly 1/4 teaspoon, is the target for most foods. The strip chemistry needs the right food-to-buffer ratio, so too much sample can throw off extraction and reliability. When in doubt, it is better to err on the side of a slightly smaller sample.
Where you sample from matters. Cross-contact doesn't distribute evenly through a dish. If you're testing a piece of grilled protein, sample from the char mark or the edge, the highest-risk area. If you're testing a sauce-heavy dish, capture some of the sauce in your sample, not just the solid portion. One test reflects one location. For foods with higher contamination risk, sampling thoughtfully from the area of concern improves the quality of the information you get.
One test is one data point. A result applies only to the sample you tested. It does not certify an entire dish, batch, or product and it does not validate or invalidate an entire brand. NIMA measures the food directly in front of you, in that moment, based on the sample you provide.. A "No Gluten Found" result means gluten was not detected at or above 10ppm in that specific sample.
NIMA works alongside your other tools, not instead of them. Always communicate your needs to restaurant staff before ordering. Read labels carefully. Track patterns and symptoms over time. Use your judgment. NIMA adds a layer of information. It doesn't replace the habits and precautions you already rely on.
Food Categories: What to Know Before You Test
Not all foods behave the same way in the capsule. Below is our guidance on one category NIMA cannot reliably test, as well as food categories that may require modified preparation, a different sampling approach, or more careful interpretation of results.e.
Foods NIMA Cannot Reliably Test
Some foods and drinks are not good candidates for NIMA because the gluten proteins in them may be changed, broken down, or altered during processing in ways lateral flow testing cannot measure consistently. This includes certain fermented, hydrolyzed, and alcohol-based products, such as soy sauce, beer, and malt vinegar. In these cases, the limitation is not the way the sample is prepared. It is the type of product itself.
Food Categories: Special Considerations
Uneven mixing is an important consideration. Some food types are harder to mix evenly in the extraction buffer. Thick, dense, sticky, oily, fatty, dry, powdery, and crumbly foods may not disperse uniformly, which can affect sample consistency and, in some cases, contribute to missed contamination, clogging, or insufficient sample.
Liquids present a different challenge. Too much liquid can cause slow-flow or no-flow errors, and over-dilution can lower the concentration of gluten in the buffer, making detection more difficult.
The matrix below includes both the category where lateral flow tests like NIMA cannot reliably test food and other food types that require additional preparation, a modified sampling technique, or careful interpretation of results. In most cases, a practical way to improve testing. Where there is not, we say so clearly.
This guidance is consistently being refined in consultation with our scientific team. Updated recommendations are being added as protocols for additional food categories are confirmed.
|
Category |
Why It Matters |
How to Handle It |
Examples |
|
⛔ DO NOT TEST - Results unreliable regardless of technique |
|||
|
Fermented, hydrolyzed foods, and alcohol |
Protein structure altered during fermentation or hydrolysis; antibody may not bind reliably. Alcohol disrupts chemistry. |
Do not test. Use ingredient labels. Examples: soy sauce, malt extract, beer, vinegar (malt), alcohol. |
Fermented, hydrolyzed foods, and alcohol |
|
⚠️ TEST WITH CARE - Modified technique required |
|||
|
Thick, dense, or sticky foods |
These may not mix evenly with the extraction buffer, leading to an uneven sample that may miss contamination. Can also clog the capsule. |
Dilute 1:1 with water. Use a smaller-than-usual sample. Note: excessive dilution may cause issues. |
Peanut butter, nut butters, hummus, fudge, energy bars, cream cheese, thick sauces |
|
High oil & fat foods |
Oil and fat resist mixing with the water-based extraction buffer, creating an uneven sample. |
Dilute 1:1 with water. Use a smaller sample. Same caution re: excessive dilution applies. |
Salad dressings, oil-heavy sauces, fried items with heavy coating, pie crust, buttery pastries |
|
Liquid & high-moisture foods |
Overfilling with liquid is the most common user error. Too much liquid causes slow flow, no-flow errors, or dilution that lowers detectable ppm. |
Test solid portions where possible. For liquids: use approximately 5–6 drops if using a dropper. Do not fill past the spindles at the bottom of the capsule. Dilute thicker soups and sauces with a few drops of water. |
Soups, cream sauces, gravies, smoothies, salad dressings |
|
Very dry, powdery, or crumbly foods |
Dry materials don't dissolve evenly in the extraction buffer. Too much powder can make the capsule hard to close. Too little may produce an insufficient sample. |
For powders: Use less than 1/8 teaspoon. Mix into a slurry with a droplets of water before testing (1:1 dilution). |
Loose spices, flour blends, protein powders, dry crackers, rice cakes |
|
Brightly colored or high-pigment foods |
Strong pigments can interfere with the optical reader's ability to interpret the test strip, potentially causing false positives or false negatives. |
Dilute with water to reduce color intensity. Interpret results with awareness of this limitation. Any food that would visibly stain a strip red or purple is in this category. |
Beet juice, beet-based dishes, Tajin-heavy foods, deeply colored sauces or marinades, turmeric-heavy curries |
|
High-acidity foods |
Very low pH (below approximately 3.5) can disrupt the antibody-buffer interaction and cause false positives. Small pea-sized amounts are generally manageable; large amounts of acidic liquid are the problem. |
Use a small sample. Dilute 1:1 with water. Note: pea-sized amounts of most acidic foods test reliably - it is large volumes of highly acidic liquid that create risk. |
Vinegar (especially in large amounts), lemon juice, tomato-based sauces, citrus marinades, most salad dressings |
|
Spices with known pH interference (paprika, Tajin, similar) |
Certain high-concentration spices - particularly those with acidic or deeply colored properties - interfere with chemistry and optical reading simultaneously. |
Avoid testing spices in their pure or concentrated form. Foods where a high-interference spice makes up a dominant proportion of the sample may warrant additional caution. |
Paprika-heavy dishes, Tajin, cumin at high concentrations, chili powder blends |
|
🔍 INTERPRET WITH CAUTION - Results require context |
|||
|
Foods with hot spots or uneven contamination |
Cross-contamination from shared grills, surfaces, or fryers may affect specific areas of a dish - not the whole thing. A single test from one area may miss contamination elsewhere. |
Test from the highest-risk area of the dish. For grilled proteins: include a sample from the char mark or edge. For fried items: test the coating. Using your knife or fork to score the surface and collect from multiple points improves coverage. |
Grilled proteins (char marks, shared grill), shared-fryer items, stir-fry dishes, items cut on shared surfaces |
|
Wheat starch-containing products |
Wheat starch is a gluten derivative where the protein (gliadin) has been largely removed during processing. NIMA tests for gliadin. A product using wheat starch may test below the detection threshold even if it is not labeled gluten-free - because the protein, not the starch, is what NIMA detects. |
Understand this as a known nuance, not a device failure. A negative result on a wheat starch product does not confirm it is safe for celiac. Follow manufacturer labeling and your care provider's guidance. |
Pringles Original, some European gluten-free products, processed snacks with wheat starch listed as an ingredient |
|
High cross-contact risk environments |
Airborne flour, shared fryers, and surface cross-contact cannot be captured by any test result. NIMA tests the food in front of you -not the environment it was prepared in. |
If a restaurant has stated it cannot safely serve someone with celiac disease, that answer stands. A 'No Gluten Found' result does not override an explicit safety warning from the kitchen. Restaurant communication comes before testing - not after. |
Restaurants with open flour use (bakeries, pizza), shared-fryer kitchens, establishments that have communicated they cannot accommodate celiac |
A Note on Results You Didn't Expect
If you receive a result that surprises you, positive or negative, the first question worth asking is whether technique played a role. NIMA performs best when the sample is the right size, mixes evenly with the extraction buffer, and is appropriate for this type of test. For challenging foods, especially thick, dense, sticky, oily, or dairy-forward foods, preparation can meaningfully affect how well the protein is extracted and whether the result reflects the sample accurately.
For a positive result on a food you expected to be safe: consider the category. Was it thick, creamy, or dairy-based? Was the sample size on the larger side? Did you add a few drops of water? For dense and dairy-forward foods especially, a dilution step can make a meaningful difference in how evenly the sample mixes with the extraction buffer. A repeat test using a smaller sample with added water is always a reasonable next step.
For a negative result on a food you suspect may have contained gluten: consider where you sampled from. Cross-contact from a shared grill, shared fryer, or shared surface may affect specific areas of a dish rather than the whole thing. If you have ongoing symptoms despite consistent negative results, that warrants a conversation with your healthcare provider. It may point to another trigger, or to a gap in your overall approach that goes beyond what any point-of-use test can address.
Neither outcome means NIMA failed. It means additional information may be needed.
What NIMA Does and Doesn't Do
We believe you deserve a straight answer on this.
NIMA does:
- Detect gliadin (the reactive component of gluten) down to 10ppm with 99% probability of detection
- Deliver results in about 3 minutes from a real sample of the food in front of you
- Give you an additional, concrete data point in uncertain moments
- Work best as part of a complete approach, alongside label reading, restaurant communication, and your healthcare provider's guidance
NIMA does not:
- Test an entire dish; it tests the sample you provide
- Reliably detect gluten in fermented, hydrolyzed, or alcohol-based products, where protein structure has been altered
- Guarantee the safety of a meal or a product
- Override an explicit warning from a kitchen that they cannot safely prepare food for someone with celiac disease
- Validate or invalidate an entire brand or product line based on one test result
- Replace your medical care, your dietitian, or your own judgment
Our Commitment to You
This guidance is actively being refined. As our scientific team confirms testing protocols for additional food categories, we will update this resource. If you have a question about a specific food or a result you're trying to make sense of, we want to hear from you. You can reach our team at customerservice@nimanow.com.
