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point of fruit powder suitable for DC by spray drying and (b) study the powder properties to identify those that are affected by the extract nature. Particularly, a unique set of operating conditions was found to be appropriate to produce powders of seven different medicinal plant extracts. In fact, all the spray-dried products showed adequate flowability, stability and compactability.Fermented plant extract (FPE) is a kind of plant functional food fermented by various microorganisms to make a beverage or other physical forms. To provide technical support for the industrial production of gynostemma extract powder, the quality characteristics of fermented plant extract prepared by hot air-drying, spray drying, vacuum microwave drying, and freeze-drying are compared for an FPE product. The effects of maltodextrin, soluble starch, and β-cyclodextrin as a drying agent on drying effect were studied. Results show that spray-dried FPE powder has the highest bulk density, the smallest average particle size, while the vegetable powder produced by freeze-drying has the best color and flavor, the highest content of key components including total sugar, soluble protein, vitamin C, total polyphenol content, and highest antioxidant capacity.
YY-312 is a acer truncatum bunge extract from Imperata cylindrical Beauvois, Citrus unshiu Markovich, Evodia officinalis Dode . These plants have been commonly used as medicinal herbs in Korea, and have been reported to have health promoting effects, including reduction of body fat. Evodiamine, a major alkaloidal compound extracted from Evodia officinalis Dode, was thought to elicit anti-obesity effects through uncoupling protein-1 (UCP1) thermogenesis, but it was also suggested to have the potential to prevent obesity by inhibiting adipocyte differentiation through stimulating the extracellular signal regulated kinase (ERK)/mitogen activated protein kinase (MAPK) signaling pathway . Citrus unshiu Markovich, the peel of immature citrus fruit in the Rutaceae family, is known to have plenty of flavonoids . Citrus peel extracts have been reported to exert an anti-obesity effect through the promotion of β-oxidation and lipolysis in adipose tissue . Imperata cylindrical Beauvois, the root of cogongrass in the Poaceae family, is known to have potent anti-oxidant activity due to its abundant polyphenols .
A previous study showed that YY-312 has an anti-obesity effect in high-fat diet (HFD)-induced obese mice and that it suppresses adipocyte differentiation in 3 T3-L1 cells . However, it can be ascertained only through human clinical trials whether the individual ingredients in YY-312 have a synergistic effect in the human body, or whether their interactions augment toxicity. Hence, this randomized controlled trial was conducted to evaluate the efficacy and safety of YY-312 for body fat reduction in overweight Korean adults.