Psyllium, obtained primarily from the seed husk of Plantago ovata, is a dietary fiber of growing interest in the food, nutraceutical, and pharmaceutical sectors due to its technological and physiological properties. Traditionally used in Ayurvedic and folk medicine in India and Pakistan for the treatment of gastrointestinal disorders, psyllium has progressively gained international relevance as a functional ingredient for the formulation of nutritionally enhanced foods. This paper analyzes the main botanical, production-related, and functional characteristics of Plantago ovata, examining the plant’s origin, cultivation areas and geographical distribution, agronomic practices, harvesting methods, and raw material processing. Attention is given to the chemical composition of the seed husk, which is rich in non-starch polysaccharides, especially arabinoxylans, responsible for its high water absorption capacity, viscosity, and gel-forming properties. The paper also investigates the physicochemical and rheological properties of psyllium and its interactions with food matrices, highlighting its role as a natural hydrocolloid, thickening, stabilizing, and structuring agent. These characteristics allow its use in numerous industrial applications, particularly in fiber-enriched products and gluten-free formulations, where it contributes to improving texture, stability, and water-holding capacity. A significant section of the paper focuses on the physiological effects associated with psyllium consumption, including the modulation of carbohydrate and lipid metabolism, improvement of intestinal function, increased satiety, and potential interactions with the gut microbiota. Scientific evidence regarding the potential role of psyllium in the prevention and management of metabolic disorders such as type 2 diabetes, obesity, hypercholesterolemia, and gastrointestinal diseases is also discussed. Finally, the paper examines the regulatory framework and the nutritional and health claims associated with psyllium, together with current market trends highlighting the growing interest of the food industry in plant-based functional ingredients. Overall, this paper highlights psyllium fiber as a multifunctional ingredient of considerable technological and nutritional interest, whose application is continuously expanding due to its rheological properties, versatility, and potential health benefits supported by scientific literature.
Lo psyllium, ottenuto principalmente dalla buccia del seme di Plantago ovata, rappresenta una fibra alimentare di crescente interesse nel settore alimentare, nutraceutico e farmaceutico grazie alle sue proprietà tecnologiche e fisiologiche. Tradizionalmente impiegato nella medicina ayurvedica e nella medicina popolare dell’India e del Pakistan per il trattamento di disturbi gastrointestinali, lo psyllium ha progressivamente acquisito rilevanza a livello internazionale come ingrediente funzionale destinato alla formulazione di alimenti ad elevato valore nutrizionale. L’elaborato analizza le principali caratteristiche botaniche, produttive e funzionali di Plantago ovata, approfondendo l’origine della pianta, le aree di coltivazione e diffusione geografica, le tecniche colturali, la raccolta e i processi di lavorazione della materia prima. Particolare attenzione viene dedicata alla composizione chimica della buccia del seme, ricca di polisaccaridi non amidacei, in particolare arabinoxilani, responsabili dell’elevata capacità di assorbimento dell’acqua, della viscosità e della formazione di gel. L’elaborato approfondisce inoltre le proprietà fisico-chimiche e reologiche dello psyllium e le sue interazioni con le matrici alimentari, evidenziandone il ruolo come idrocolloide naturale, addensante, stabilizzante e agente strutturante. Tali caratteristiche ne consentono l’impiego in numerose applicazioni industriali, soprattutto nei prodotti arricchiti in fibra e nelle formulazioni gluten free, dove contribuisce al miglioramento della texture, della stabilità e della capacità di ritenzione idrica. Una parte significativa dell’elaborato è dedicata agli effetti fisiologici associati al consumo di psyllium, tra cui la modulazione del metabolismo glucidico e lipidico, il miglioramento della funzionalità intestinale, l’aumento del senso di sazietà e le possibili interazioni con il microbiota intestinale. Vengono inoltre analizzate le evidenze scientifiche relative al potenziale ruolo dello psyllium nella prevenzione e nella gestione di patologie metaboliche quali diabete di tipo 2, obesità, ipercolesterolemia e disturbi gastrointestinali. Infine, vengono esaminati gli aspetti normativi e i claims nutrizionali e salutistici associati allo psyllium, oltre alle attuali tendenze di mercato che evidenziano il crescente interesse dell’industria alimentare verso ingredienti funzionali di origine vegetale. Nel complesso, l’elaborato evidenzia come la fibra di psyllium rappresenti un ingrediente multifunzionale di elevato interesse tecnologico e nutrizionale, il cui impiego risulta in continua espansione grazie alla combinazione di proprietà reologiche, versatilità applicativa e potenziali benefici per la salute supportati dalla letteratura scientifica.
Caratteristiche funzionali e tecnologiche della fibra di Psyllium (Plantago ovata)
CALDERARO, ELENA
2025/2026
Abstract
Psyllium, obtained primarily from the seed husk of Plantago ovata, is a dietary fiber of growing interest in the food, nutraceutical, and pharmaceutical sectors due to its technological and physiological properties. Traditionally used in Ayurvedic and folk medicine in India and Pakistan for the treatment of gastrointestinal disorders, psyllium has progressively gained international relevance as a functional ingredient for the formulation of nutritionally enhanced foods. This paper analyzes the main botanical, production-related, and functional characteristics of Plantago ovata, examining the plant’s origin, cultivation areas and geographical distribution, agronomic practices, harvesting methods, and raw material processing. Attention is given to the chemical composition of the seed husk, which is rich in non-starch polysaccharides, especially arabinoxylans, responsible for its high water absorption capacity, viscosity, and gel-forming properties. The paper also investigates the physicochemical and rheological properties of psyllium and its interactions with food matrices, highlighting its role as a natural hydrocolloid, thickening, stabilizing, and structuring agent. These characteristics allow its use in numerous industrial applications, particularly in fiber-enriched products and gluten-free formulations, where it contributes to improving texture, stability, and water-holding capacity. A significant section of the paper focuses on the physiological effects associated with psyllium consumption, including the modulation of carbohydrate and lipid metabolism, improvement of intestinal function, increased satiety, and potential interactions with the gut microbiota. Scientific evidence regarding the potential role of psyllium in the prevention and management of metabolic disorders such as type 2 diabetes, obesity, hypercholesterolemia, and gastrointestinal diseases is also discussed. Finally, the paper examines the regulatory framework and the nutritional and health claims associated with psyllium, together with current market trends highlighting the growing interest of the food industry in plant-based functional ingredients. Overall, this paper highlights psyllium fiber as a multifunctional ingredient of considerable technological and nutritional interest, whose application is continuously expanding due to its rheological properties, versatility, and potential health benefits supported by scientific literature.| File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/110336