Abstract—Energy gel drink tends to be more popular as functional drink. Bioactive compounds and antioxidant activities were interested to study in this type of drink. The objective of this study was to find out the optimal formula for main ingredient, minor ingredient and gelling agent of longan energy gel drink. It was found that the optimal formula for main ingredient consisted of 69.5% longan juice, 30% longan honey and 0.5% citric acid which had 25 ᵒBrix TSS and 0.5% TA (as citric acid). The mixture of main ingredient was added with minor ingredient which consisted of 0.54% branch chain amino acid (BCAA), 0.11% vitamin B complex and 0.03% commercial caffeine powder. Carboxymethyl cellulose (CMC) was selected to be added at 0.7% for gelling agent since no syneresis and the high acceptance sensory scores. Longan energy gel drink mixture was filled (150 g), sealed in retortable pouch and boiled in water (95-97 ᵒC) for 5 min. One serving size (150 g) of this product had 165 kcal. In addition, it also had high bioactive compounds such as 0.401±0.009 mg GAE/ml of total phenolics, 0.013±0.002 mg/ml of gallic acid and 0.005±0.001 mg/ml of ellagic acid. These bioactive compounds could also provide high antioxidant activities. This longan energy gel drink had high potential to produce at commercially scale.
 

Index Terms—longan, energy gel drink, gelling agent, bioactive compound, antioxidant activity

Cite: Kochkaew Suriya and Somchai Jomduang, "The Optimal Formula of Longan Energy Gel Drink Containing of High Bioactive Compounds and Antioxidant Activities," International Journal of Food Engineering, Vol. 5, No. 4, pp. 256-261, December 2019. doi: 10.18178/ijfe.5.4.256-261