A functional beverage made with peanuts, rice, and MCT can be used to alleviate diet-related health concerns such as overweight/obesity and hypercholesterolemia. This study was conducted to optimize the formula for a peanut-rice drink with MCT and characterize this drink as a functional beverage. Development of the PR drink with MCT involved the determination of the best ratio of peanuts (P), rice (R), sugar (S), and water (W) for a beverage of optimal product cost and sensory acceptability. Formula optimization using a D-optimal mixture design generated the following models for product cost (PC) and sensory acceptability (appearance acceptability (AA), mouthfeel acceptability (MA), peanut flavor acceptability (PFA), sweetness acceptability (SA), overall acceptability (OA)):
PC = 29.94P + 22.01R + 24.85S + 15.08W
AA = – 103.08P – 536.98R + 435.03S + 2.09W + 443.79PR – 451.11PS
+155.40PW – 239.01RS + 630.67RW – 440.28SW
MA = – 4.72P + 4.70R + 18.32S + 6.82W
PFA = 4.64P + 5.56R + 27.47S + 4.38W
SA = 1.24P + 9.24R + 42.01S + 3.61W
OA = 0.70P – 0.75R + 28.81S + 4.86W
Validation confirmed the predictive capacity of all the models within a 95% prediction interval. From the above models, an optimal formulation with regular sugar (ORS)(7.63%P, 2.73%R, 6.71%S, and 82.93%W) and optimal formulation with less sugar (OLS) (9.38%P, 4.48%R, 4.11%S, and 82.01%W) was obtained. The latter was subjected to physicochemical and nutritional characterization. The OLS PR drink with MCT is a brown beverage (59.46L*, 8.91a*, 24.61b*) with a pH of 7.03 ± 0.06, TSS of 8.74 ± 0.08 °Brix, and viscosity of 817.07 ± 44.39 cP (ca 15°C) and 699.15 ± 37.50 cP (ca 20°C). The drink had 81.2%wb moisture, 8.0%wb protein, 7.0%wb fat, 0.15%wb TAC, 3.5%wb crude fiber, and 0.15%wb ash. It had low protein quality (PDCAAS of 11-12) and lysine as its limiting amino acid. For fatty acid composition, 100 g of drink had 0.78 g essential fatty acids (FAs), 5.00 g nonessential medium-chain FAs, and 1.37 g nonessential long-chain FAs. Mineral content per 100g
drink was composed of 12.0 mg phosphorus, 27.8 mg sulfur, 10.0 mg magnesium, 11.6 mg sodium, 34.7 mg potassium, and less than 10.0 mg of calcium, iron, zinc, copper, manganese, selenium, chromium, and molybdenuml.This study found that the OLS peanutrice drink with MCT can be potentially used as a functional beverage for energy production in the body, fat loss, and/or management of hypercholesteremia through meal supplementation.
