Hydroxypropyl methyl cellulose microcapsules for delivering food compounds to the gut
What it found
Hydroxypropyl methyl cellulose mixed with guar gum formed tiny capsules that released two test compounds slowly in lab tests.
The capsules also protected one compound from heat damage.
What they found
Animal and lab studies
Slow release in lab tests
In lab tests, the capsules released 83.4% of the mannose steadily over 12 hours. Curcumin release depended on acidity levels, reaching 86.6% under gut-like conditions.
Heat protection for curcumin
After 7 days at 40 °C, the capsules kept 55% of the curcumin intact. Without the capsule, only 34% of free curcumin survived the same heat exposure.
Other findings
Capsule loading success
The capsules successfully trapped 84.2% of the mannose and 81.9% of the curcumin during the making process.
How the structure holds together
Lab analysis showed the two gums formed a strong network linked by hydrogen bonds. Computer models pointed to guar gum driving most of this bonding.
What the authors conclude
- They describe their hydroxypropyl methyl cellulose and guar gum mixture as a scalable, food-grade platform for delivering active compounds. Their work aims to help design functional foods by carrying ingredients with very different solubility traits together. The authors advise this method improves targeted release in the gut.
How it was done
The authors wanted a better way to deliver active food compounds so the body can absorb them more easily. They aimed to release these compounds directly in the gut rather than earlier in digestion.
Scientists made tiny capsules using hydroxypropyl methyl cellulose and guar gum through a spray-drying process. They loaded these capsules with mannose and curcumin as test compounds. They then measured how well the capsules held up, released their contents, and protected curcumin from heat over 7 days at 40 °C.
What it can’t tell you
- We summarised it from the abstract only.
- These are lab and computer tests, not studies in people or animals. They cannot show how the human body actually absorbs or uses these capsules. Scientists do not yet know if this delivery method changes health outcomes in real diets.
Who paid
- Conflicts
- Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
- Authors work at
- Tianjin University of Science & Technology, China
The paper
- Title
- HPMC-GG microcapsules for co-delivery of mannose and curcumin: enhanced intestinal targeting in functional foods
- Type
- Study
- Evidence
- Animals and lab studies
- Summarised from
- Abstract only
- Cite
- Wang X, Liang X, Qiu Z, et al (2026). HPMC-GG microcapsules for co-delivery of mannose and curcumin: enhanced intestinal targeting in functional foods. Food chemistry. doi:10.1016/j.foodchem.2025.147335PubMed 41349399DOI
Summary written 1 Oct 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error