Researchers developed a new test using tiny glowing copper particles that can detect vitamin B12 at concentrations as low as 0.039 micromolar and diosmetin at 0.160 micromolar in food samples. According to Gram Research analysis, this breakthrough uses a special two-part coating to enhance the particles’ fluorescence, enabling rapid detection without expensive laboratory equipment. The test can be performed on a simple paper strip, making it practical for instant food quality checks in any setting.
Scientists created a new tool that can quickly detect vitamin B12 and a plant compound called diosmetin in food using tiny copper particles that glow. According to Gram Research analysis, this breakthrough uses a special two-part coating to make the particles shine brighter, allowing them to spot these nutrients at extremely low levels. The test works without expensive equipment and can be done on a simple paper strip, making it useful for checking food quality in stores, farms, or anywhere else. This innovation could help ensure the food we eat contains the nutrients we need.
Key Statistics
A 2026 laboratory study published in Spectrochimica Acta demonstrated that dual-ligand engineered copper nanoclusters achieved detection limits of 0.039 micromolar for vitamin B12 and 0.160 micromolar for diosmetin in food samples.
The new copper particle test successfully measured vitamin B12 across a linear range of 0.10-52.25 micromolar and diosmetin from 0.50-62.25 micromolar, demonstrating broad applicability across different nutrient concentrations.
Researchers created a paper-strip version of the test that requires no equipment and provides visual results in seconds, enabling field deployment for food quality verification without laboratory infrastructure.
The Quick Take
- What they studied: Can tiny glowing copper particles with a special two-part coating detect vitamin B12 and diosmetin (a plant nutrient) in food samples quickly and accurately?
- Who participated: This was a laboratory study testing the new detection tool on various food samples. No human participants were involved; instead, researchers tested the copper particles on real foods to see how well they worked.
- Key finding: The new copper particle test could detect vitamin B12 at levels as low as 0.039 micromolar and diosmetin at 0.160 micromolar, with excellent accuracy across different food types.
- What it means for you: Food companies and quality inspectors could soon use simple, inexpensive paper strips to instantly check if foods contain the right amounts of vitamin B12 and other nutrients, without needing expensive lab equipment. This could help ensure the food you buy is nutritious.
The Research Details
Researchers created tiny copper particles (called nanoclusters) smaller than a grain of sand and coated them with two special molecules: 5-methyl-2-thiouracil and N-acetylneuraminic acid. These coatings work together to make the particles glow brighter red when exposed to light. The two-part coating strategy is like adding a double layer of protection that helps the particles shine more intensely.
The team then tested whether these glowing particles could detect vitamin B12 and diosmetin in food samples. They used a special light-based technique to measure how brightly the particles glowed when these nutrients were present. The brighter the glow, the more nutrient is in the sample.
Finally, they created a simple paper strip version of the test that doesn’t need any equipment—similar to a home pregnancy test—so anyone could use it in the field to check food quality instantly.
Current methods to test for vitamin B12 and diosmetin in food require expensive laboratory equipment and trained technicians, making testing slow and costly. This new approach is important because it’s simple, fast, and cheap. A paper-strip version means food safety inspectors at farms or stores could test products immediately without sending samples to a lab, catching problems before food reaches consumers.
This is a laboratory research study that demonstrates the tool works in controlled conditions. The researchers tested the copper particles on real food samples and reported good recovery rates (meaning the test accurately found the nutrients when they were added). However, because this is early-stage research, the tool hasn’t yet been tested in real-world conditions or compared directly to existing testing methods used in industry. The study focused on proving the concept works rather than testing it with many different food types or in actual food production settings.
What the Results Show
The new copper particle test successfully detected vitamin B12 at extremely low concentrations—as little as 0.039 micromolar, which is about 50 times smaller than the width of a human hair. For diosmetin, the detection limit was 0.160 micromolar. These detection limits are significantly better than many existing methods, meaning the test can spot these nutrients even when they’re present in tiny amounts.
The test worked accurately across a wide range of nutrient concentrations. For vitamin B12, it could measure amounts from 0.10 to 52.25 micromolar, and for diosmetin from 0.50 to 62.25 micromolar. This broad range means the test works whether nutrients are scarce or abundant in a food sample.
When researchers tested the copper particles on actual food samples, they achieved excellent recovery rates, meaning the test accurately identified the nutrients present. This demonstrates the tool’s reliability in real-world conditions. The researchers also created a paper-strip version that requires no equipment and can provide visual results in seconds, making it practical for field use.
Beyond detecting nutrients, the copper particles showed promise for other applications. The researchers noted the particles could potentially be used for anti-forgery measures (detecting fake products) and fingerprint analysis. The eco-friendly manufacturing process used to create the particles is also noteworthy—it’s simpler and more environmentally responsible than many existing methods for making similar detection tools.
While the research paper doesn’t directly compare this method to other existing vitamin B12 and diosmetin detection techniques, the detection limits achieved (0.039 μM for B12 and 0.160 μM for diosmetin) represent significant sensitivity improvements over many conventional laboratory methods. The key innovation is the dual-ligand coating strategy, which previous research hadn’t optimized in this specific way. The paper-strip format is also novel—most existing detection methods require laboratory equipment, making this approach more accessible and practical.
This study was conducted entirely in laboratory conditions using prepared food samples, not real-world food products as they’re actually sold. The copper particles haven’t been tested by multiple independent laboratories or compared side-by-side with the current gold-standard testing methods used in industry. The study doesn’t include information about how the test performs with different food types, storage conditions, or over time. Additionally, the paper doesn’t discuss cost comparisons with existing methods or provide details about how many food samples were tested. Before this tool could be used in actual food production or retail settings, it would need larger-scale testing and validation studies.
The Bottom Line
This research shows strong promise for a new way to test foods for vitamin B12 and diosmetin, but it’s still in the early development stage. Food safety professionals and researchers should monitor further developments of this technology. For consumers, this doesn’t yet change how you should approach nutrition—continue following standard dietary guidelines for vitamin B12 intake. If this technology is eventually commercialized, it could provide a faster, cheaper way for food companies to verify nutrient content.
Food manufacturers, quality control inspectors, and food safety regulators should pay attention to this development as a potential tool for their work. Researchers studying food safety and nutrient detection should follow this research direction. Consumers interested in food quality and nutrition will benefit once this technology is commercialized and validated. People with vitamin B12 deficiency concerns should not change their current testing or supplementation based on this laboratory research alone.
This is early-stage research, so it will likely take 2-5 years before this technology could be tested in real food production settings. If successful in those tests, it might take another 2-3 years before becoming available as a commercial product. Don’t expect to see this in stores or food facilities immediately, but it represents a promising direction for future food testing.
Frequently Asked Questions
How can I test if my food has enough vitamin B12?
Current methods require laboratory testing, but new research shows promise for a simple paper-strip test that works without equipment. This technology is still in development and not yet commercially available, but could become a practical option for food companies and consumers within a few years.
What is diosmetin and why does it matter in food?
Diosmetin is a plant compound found in citrus fruits and other foods that may have health benefits. Researchers are developing better ways to detect it in foods to ensure quality and nutritional content. This new copper particle test can identify diosmetin at extremely low levels.
Can I use this test at home right now to check my food?
Not yet. This is laboratory research that hasn’t been commercialized. The technology shows promise for future consumer use, but it needs more testing and development before becoming available as a commercial product for home or retail use.
Is this test more accurate than current vitamin B12 testing methods?
The new test shows excellent sensitivity in laboratory conditions, detecting vitamin B12 at very low concentrations (0.039 micromolar). However, direct comparisons with existing commercial methods haven’t been published yet, so we can’t definitively say it’s more accurate until independent validation studies are completed.
How long does it take to get results with this new test?
The paper-strip version provides visual results in seconds without requiring any equipment, making it much faster than traditional laboratory testing which typically takes hours or days. This speed is one of the major advantages of the new technology.
Want to Apply This Research?
- Users could photograph and log results from paper-strip tests (once commercialized) to track vitamin B12 levels in foods they purchase regularly, noting which brands or products consistently show higher nutrient content.
- When this technology becomes available, users could use it to verify that foods labeled as ‘high in B12’ actually contain the claimed amounts, helping them make informed purchasing decisions and identify reliable brands.
- Set weekly reminders to test commonly purchased foods (fortified cereals, plant-based milks, supplements) to track whether nutrient levels remain consistent across batches and seasons, building a personal database of reliable food sources.
This article describes early-stage laboratory research on a detection technology that is not yet commercially available. The findings are promising but have not been independently validated or compared to existing clinical testing methods. If you have concerns about vitamin B12 levels, consult your healthcare provider for appropriate testing and diagnosis. Do not rely on this emerging technology for medical decisions. This research is intended for informational purposes and should not be considered medical advice.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.