The data of the present studies “Formulation and characterization of gluten free malted multigrain beverage premix” are discussed in this chapter.
Sensory attributes of the malted multigrain beverage premix
Colour and appearance
It can be observed from the Table 2 that mean sensory scores of malted beverage premix in relation to colour and appearance indicates that T
1 had the highest score (9.0) followed by T
2 (8.5) and T
3 (7.5) respectively. The results of analysis of variance shows that the calculated F value (92.2) for treatments is higher than the tabulated F value (4.75) at the 5% level of significance. This indicates that the treatments had a significant effect on the colour and appearance of the malted beverage premix. Hence, it can be concluded that the incorporation of different proportions of buckwheat, green gram, soybean, carrot, beetroot and mint leaves significantly improved the colour and appearance of the product. It was observed that all three experimental treatments of malted beverage premix showed increased intensity of colour because of the addition of increasing proportion of buckwheat, green gram, soybean, carrot, beetroot and mint leaves which gave the treatment a pinkish red colour in T
1 comparison to T
2 and T
3 which included has more intense deep brown colour as compared to other treatments little lighter colour.
Khwairakpam and Murugkar (2023) reported that in the development of millet-based beverages, the addition of ingredients (
e.
g., carrot and cocoa powder) significantly affected colour attributes, with increased redness and yellowness correlating with higher sensory colour scores among panelists.
Consistency
It can be observed from the above Table 2 that mean sensory scores of malted beverage premix in relation to consistency indicates that T
1 treatments had the highest score 8 followed by T
2 (7.5) and T
3 (7.0) respectively. Statistical analysis revealed that the calculated F value (83.7) for treatments was higher than the tabulated F value (3.23) at (3,6) degrees of freedom at the 5% probability level. This indicates that the treatments had a significant effect on the consistency of the malted beverage premix. Hence, the incorporation of different proportions of buckwheat, green gram, soybean, carrot, beetroot and mint leaves significantly improved the consistency of the product. It can be concluded that addition of different proportions of buckwheat, green gram, soybean carrot, beetroot and mint leaves improves the consistency of the product.
Dipak et al. ( 2017) reported that increasing levels of soy protein isolate and pectin led to higher viscosity and improved consistency scores in sensory evaluation of developed high protein, high fiber smoothie as a grab-and-go breakfast option using response surface methodology.
Taste and flavour
It can be observed from the Table 2 that mean sensory scores of malted beverage premix in relation to taste and flavor indicates that T
1 had the highest score 9 followed by T
2 (8), T
3 (7.5), respectively. Statistically, the calculated F value (155.9) for treatments exceeded the tabulated F value (4.75) at the 5% probability level, indicating a significant effect of treatments on the taste and flavour of the malted beverage premix. The improved taste and flavor of the malted beverage premix is due to the combined effects of its ingredients as carrot and beetroot add natural sweetness, mint leaves provide a refreshing aroma, buckwheat gives a mild nutty flavor, green gram adds a subtle pulse taste and soybean enriches smoothness and richness. Together, their balanced proportions enhance the beverage’s overall palatability. The taste and flavour of the malted beverage premix were influenced not only by the ingredients but also by processing techniques such as soaking, germination and roasting. Germination enhances free amino acids and sugars, which during roasting participate in Maillard reactions, producing desirable nutty and roasted flavours. Soaking reduces bitter compounds, while roasting develops aroma and colour, improving sensory appeal. Combined with the natural flavours of buckwheat, carrot, beetroot, mint, green gram and soybean, these processes significantly enhanced the overall taste and flavour of the product (
Dong-Hwa et al., 2025).
Overall acceptability
It can be observed from the Table 2 that mean sensory scores of malted beverage premix in relation to overall acceptability indicates that T
1 had the highest score 8.6 followed by T
2 (7.8) T
3 (7.3) respectively. It can be concluded that the addition of buckwheat, green gram, soybean, carrots, beetroot and mint leaves improve the overall acceptability of malted beverage premix.
Physicochemical properties of malted beverage premix
Table 3 showed the malted multigrain beverage premix prepared from buckwheat, green gram, soybean and the addition of carrots, beetroot and mint leaves are responsible to increases the pH which is around 6.35 and on the other hand, a higher pH (low acidity) can make a beverage taste fuller or rounder (
Jena et al., 2013).
The change in pH has the more hydrogen ions in a solution, the more acidic it is. pH is indirectly proportional to the total acidity of the sample. The pH and acidity of a beverage can impact its taste, safety and shelf life. The high acidity (7.0) can make a beverage taste tart and it may help to increase the shelf life of the malted multigrain beverage premix. While low acidity can make it taste flat or bland and may be the reason for affecting it’s shelf life. High acidity can brighten a flavor and may be the reason for decreasing the growth of micro-organsim and low acidity can increase the growth of micro-organism
(Pulligundla et al., 2010). The malting duration significantly affects the Total Soluble Solids (TSS) of a buckwheat, green gram, soybean and carrots, beetroot and mint leaves primarily indicating changes in sugar content. In prepared malted beverage premix TSS was observed relatively high, typically around 6.46 (Table 3) Brix reflecting the natural sugars in the carrots and beetroot.
The water activity (aw) of powdered beverages plays a crucial role in determining their stability and quality over their shelf life. A decrease in the amount of free water present in the product leads to a reduction in water activity. Water activity was monitored to determine the potential for growth of micro-organisms
(Pragati et al., 2014). The water activity of the best treatment was observed 0.65 (Table 3) that near about the standard value. The increased value of water activity in best treatment may be due to the hygroscopic nature of the MBP which is rich in protein. The proteins are known to have high affinity for water molecule and other hydrophilic constituents that may be the reason for the water activity.
Green gram incorporation at 15% proved strategically important for protein enhancement. Pulse addition exceeding 20% in cereal-based products increases batter viscosity and prolongs cooking time due to modified starch-protein interactions and altered water absorption properties
(Gaikwad et al., 2026).
Bulk density is a measure of the weightiness of a materials and a lower bulk density is nutritionally beneficial as it promotes the digestibility of the product if the bulk density is lower than small particles of flour can bind together to highest range. Then the result is increased energy content (
Dong-Hwa et al., 2025). This can be influenced by the shape and size of the particles, surface characteristics material and the density of the solid. If the bulk density is higher than the denser packaging material was required, which indicates the porosity of the Malted Multigrain Beverage Premix. In the best treatment of the prepared Malted Multigrain Beverage premix the bulk density (0.69 g/cm
3) (Table 3) was observed and it is compared with the value given by standard value (0.35 g/cm
3 to 0.79 g/cm
3)
(Iwe et al., 2016). The highest incorporation of Malted Multigrain Beverage Premix showed higher bulk density and tapped density, this might be due to the coarse texture of malted multigrain beverage premix which provide bulkiness
(Bian et al., 2015). Several studies have reported that the tapped density of cereal based flour ranged from 0.76 to 0.84 g/cm
3 (Budnimath et al., 2023). When a product has higher bulk and tapped density, its particles become closer to each other, effectively filling the empty spaces between them. In prepared malted multigrain beverage premix tapped density was observed 0.64 g/cm
3 (Table 3).
Foam is a colloidal of many gas or solids. These are the results of the behavior of proteins at air- water interfaces. Protein contributes to foam film formation by lowering interfacial tension. Foaming capacity of whey protein can be improved by lowering the fat content. Hence WPC is highly suitable as foaming agent as it is bland in taste and stable at different pH
(Kumar et al., 2018). The foaming capacity of different combination of mixed powder was observed 47.65% and compared from the researcher’s observed value which is 23.83 to 51.17%. This might be due to higher concentration of Malted Multigrain Beverage Premix having higher protein and crude fiber which hinders the formation of gas bubbles which turns into less value of foaming capacity. To explain this it’s needed to be considered that both protein adsorption at the air water interface and its capacity to decrease surface tension influence the liquid phase’s ability to capture air
(Zhang et al., 2004).
Nutritional composition of the malted multigrain beverage premix
The results shown in Table 4 demonstrated the nutritional profile of developed malted multigrain beverage premix best treatment (T1).The premix contained 6.3 per cent moisture, 3.42 per cent ash, 0.8 g crude fiber, 69.99 g carbohydrates and 14.27 g protein per 100 g. Among micronutrients, the iron content (8.98 mg) is relatively high, making the food a good contributor to iron intake and helpful in preventing anemia. The β-carotene content (9840 µg) is exceptionally high, highlighting its potential as a rich source of vitamin A precursor, which is essential for vision, immune function and skin health. The low moisture content ensures good storage stability and reduced microbial spoilage. Ash and protein levels indicate significant mineral and nutritional value, enhanced by malting, which improves protein digestibility and mineral bioavailability. High carbohydrate content provides energy, while β-carotene contributes antioxidant and nutritional benefits (
Tong Zhao et al., 2024). Iron content in the formulated premix further enhances its value, particularly for the treatment of iron deficiency. Similar finding were reported by
Verma and Mishra (2025) addition of defatted soya flour increased the protein value of gluten-free pasta. Pasta was formulated using varying proportions of rice flour, corn flour, defatted soy flour and guar gum flour. Nutritional analysis revealed significantly higher levels of protein, fiber, energy, vitamins and minerals in the gluten-free pasta.
Singh et al., (2017) also reported that addition of soyabean in value added multigrain porridge enhanced the protein value.
Storage quality of malted multigrain beverage premix
Microbial properties of the malted multigrain beverage premix
Data presented in Table 5 shows that the shelf-life of optimized (T
1) gluten free malted beverage includes TPC, Yeast and Mold count. According to the Food Safety and Standards Authority of India (FSSAI), the microbiological standards for malted beverage premixes, specifically malt-based foods, are outlined in the Food Safety and Standards Authority of India (Food Products Standards and Food Additives) Regulations, 2011. These standards are applicable to products obtained by mixing malt (wort, flour, or malt extract) with other ingredients such as cereal and legume flours, milk or milk powder, flavoring agents, spices, emulsifying agents and various nutrients. The observed values presented in Table 4 indicate that both the Total Plate Count and Yeast and Mould Count in the gluten-free malted beverage remain within acceptable limits, suggesting that the prepared product can be safely stored at room temperature for up to 90 days.
Sensory evaluation of best treatment during storage of malted multigrain beverage premix
Sensory evaluation data presented in Fig 4 indicates that the during storage time period from 0 day to 90 days no change was observed in colour and appearance, consistency, taste and flavour and overall acceptability of the malted beverage premix.
Limitations of the study
The study has certain limitations as it was conducted within the six-month duration of an M.Sc. thesis, which restricted the scope of investigation. Storage stability was evaluated only at room temperature and microbial analysis was limited to two key tests. Additionally, the sensory evaluation was carried out with a relatively small panel consisting of 10 trained and 20 untrained panelists (M.Sc. and Ph.D. students).
Further studies are recommended to evaluate the shelf-life stability, antioxidant retention and nutritional bioavailability, expand sensory evaluation, assess consumer acceptance and market feasibility and explore fortification with probiotics or other functional ingredients.