LIFE Science Hub ® Scientific information on nutrition and health

LIFE Science Hub — evidence-based science communication

In this Hub you can search for scientific articles created by professionals on topics concerning nutrition, nutraceuticals, health and lifestyles in general.
The authors of the editorial team are qualified biologists, each identified by an ORCID profile and with proven editorial experience in the relevant sector. Every article published on the Hub is identified by a DOI and accompanied by a complete and rigorously structured bibliography, with authors, year of publication, original title, scientific journal and clickable DOI, to guarantee transparency and traceability of sources.

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Latest articles

Cinnamon bark in a bright botanical-scientific scene, with discreet references to cinnamaldehyde, polyphenols, and coumarin.

Cinnamon and its intrinsic properties

Dott. Armando Colonnese and Roberto Panzironi; Last updated: July 2026

In brief: Cinnamon is one of the most studied spices when it comes to functional nutrition, metabolism, and diet quality, as it combines a very ancient tradition of use with ongoing scientific interest. However, behind its warm aroma and sweet note, there isn't a simple or uniform ingredient: cinnamon is a complex plant material, obtained from the inner bark, which is the innermost layer of the trunk, of different species of the genus Cinnamomum. Among different varieties, there are real differences in the phytochemical profile, i.e., the set of molecules present in the plant, and in the potential biological impact. For this reason, talking about cinnamon requires precision. The botanical species, the concentration of active compounds, the commercial form, the method of use, and even how the study results are interpreted all change. This distinction is important not only for those who cook but also for those seeking reliable information on benefits, limitations, and safety. From a nutritional point of view, cinnamon is interesting because it allows food to be flavored with minimal amounts of energy, and in some contexts, it can promote a reduction in added sugars. Biologically, its relevance derives mainly from molecules such as cinnamaldehyde, polyphenols—plant compounds with antioxidant and regulatory activity—and eugenol, a natural aromatic substance studied for its possible physiological effects. These components have been analyzed for their possible role in glycemia, insulin sensitivity—the ability of cells to respond to insulin—oxidative stress, inflammation, and certain aspects of cellular control. This combination of botanical, chemical, and physiological aspects explains why the literature on cinnamon is extensive but not always uniform, and why a serious reading must distinguish between preclinical results—obtained in the laboratory or on experimental models—clinical observations, and practical applications. In the following paragraphs, the identity of the spice, the differences between the main varieties, the meaning of bioactive compounds, its role in the diet, and the available evidence on cellular mechanisms and possible metabolic implications will be clarified. In summary, below are the key points we will explore:

Dietary Fiber Benefits: What It Is, How It Works, and Why It Matters for Metabolism, Gut Health, and Prevention

Dietary fiber benefits: metabolism, intestines, blood sugar and prevention

Dott. Armando Colonnese and Roberto Panzironi; Last updated: June 2026

In brief: Dietary fiber is a component of plant-derived carbohydrates that the small intestine does not fully digest. Precisely because of this, it exerts important effects throughout the gastrointestinal tract and across metabolic regulation. The available literature consistently shows that adequate fiber intake, especially when it comes from minimally refined plant foods, is associated with better post-meal glycemic response, a more favorable lipid profile, more regular bowel function, and a generally more stable metabolic environment. At the same time, fiber does not behave as a single, uniform entity. Its physicochemical properties shape distinct effects on digestion, intestinal fermentation, and the signaling pathways that connect the gut, liver, energy metabolism, and satiety. The scientific evidence suggests that its effectiveness depends on at least three main factors. The first is the type of fiber, because some fibers form viscous gels, some increase stool bulk, and others are fermented by the gut microbiota, that is, the community of microorganisms that inhabit the colon. The second is daily dose, since the effects observed tend to follow a dose-response pattern, although with considerable individual variability. The third is the food matrix, meaning the nutritional context in which the fiber is found, because the metabolic behavior of fiber changes depending on whether it comes from a legume, a whole grain, a vegetable, or a fortified product. Taken together, the evidence shows that fiber should not be seen only as a tool for bowel regularity, but as a nutritional lever involved in regulating multiple interconnected processes. This helps explain why it now plays a central role in cardiometabolic prevention, in the management of carbohydrate quality, and in the broader relationship between diet, gut function, and overall health. A few key points are worth highlighting from the outset: Not all fibers act in the same way, and their effects depend on their functional properties. The amount consumed each day has a major influence on the likelihood of achieving measurable benefits. The food matrix matters, because fiber in minimally refined foods is not the same as isolated fiber. Gut function and metabolism are closely linked, so digestive effects are also reflected in the metabolic profile. Increasing fiber too quickly can cause bloating, especially in more sensitive individuals.