ABSTRACT
Psyllium is a source of natural dietary fibre with recognised health benefits that can be used as a hydrocolloid with functional food applications. The purpose of this study was to determine the effect of different levels of Plantago ovata fibres in plant-based sausages on their composition, physicochemical, and mechanical properties. Proximate composition was studied. Water activity (aw), water release, pH, colour measurement, texture profile analysis (TPA), and Warner-Bratzler Shear Force (WBSF) were determined to establish the physicochemical and textural properties of sausages. A plant-based sausages microstructure study and a sensory study were carried out to better understand conformation and to determine their acceptance. The results showed that sausages had high ash and carbohydrate contents but, above all, a low-fat content. The use of psyllium increased water-holding capacity. The results also indicated that employing Plantago ovata white (PW) fibre can minimise mechanical problems and reduce colour changes. However, PW fibre showed less retained water, which was why chickpea starch further developed and was more gelatinised. At the same time, the plant-based sausages with PW fibre obtained the best overall score with the fewest colour changes in the sensory evaluation. Nevertheless, further studies are recommended to improve the texture and acceptability of these plant-based sausages. Supplementary Information: The online version contains supplementary material available at 10.1007/s00217-022-04063-2.
ABSTRACT
Consumers are increasingly interested in health and sustainability aspects of their diets. Meat reduction diets have gained popularity with some consumers, leading to an increase in plant-based products in the markets. Additionally, the demand for more natural and healthier products is associated with the clean label trend. But how these two trends relate to each other, has not yet been widely investigated. The aim of the present research was to explore the perception of different consumers (vegans, vegetarians, flexitarians and omnivores), towards clean label, plant-based products in order to better understand their motivations and attitudes. Consumers in Spain, followers of these four diets, participated in a projective mapping task - categorisation of twenty plant-based products (ten clean label and ten original products) - and answered a health and sustainability attitudes survey. The results showed that according to the diet followed by the consumers, they categorised and perceived the products differently, in line with their attitudes. Meat-reducer and avoider consumers paid more attention to quality and health and presented a greater concern for animal welfare and sustainability. Also, they focused on the clean label status for product categorization, while omnivores did not separate between original and clean label products. The present study shows a first exploration of how consumers with different relation to meat (frequent consumption-reduction-avoidance) perceive clean label plant-based products, in relation to their attitudes to health and sustainability, a building block on the way to support consumers in the transition to healthier, more sustainable diets.
Subject(s)
Vegans , Vegetarians , Animals , Diet , Diet, Vegan , Humans , PerceptionABSTRACT
The aim of this research was to evaluate the nutritional and physico-chemical properties of six different vegetable fibers and explore the possibility of using them as a thickener or gelling agent in food. To determine the technological, nutritional and physical parameters, the following analyses were carried out: water-holding capacity, water retention capacity, swelling, fat absorption capacity, solubility, particle size, moisture, hygroscopicity, pH, water activity, bulk density, porosity, antioxidant activity, phenolic compounds and mineral content. Gels were prepared at concentrations from 4% to 7% at 5 °C and analyzed at 25 °C before and after treatment at 65 °C for 20 min. A back extrusion test, texture profile analysis and rheology were performed and the pH value, water content and color were analyzed. As a result, all the samples generally showed significant differences in all the tested parameters. Hydration properties were different in all the tested samples, but the high values found for chia flour and citrus fiber are highlighted in functional terms. Moreover, chia flour was a source of minerals with high Fe, Mn and Cu contents. In gels, significant differences were found in the textural and rheological properties among the samples, and also due to the heat treatment used (65 °C, 20 min). As a result, chia flour, citrus, potato and pea fibers showed more appropriate characteristics for thickening. Moreover, potato fiber at high concentrations and both combinations of fibers (pea, cane sugar and bamboo fiber and bamboo, psyllium and citric fiber) were more suitable for gelling agents to be used in food products.
