Spray-Dried Microencapsulation of Oregano (Lippia graveolens) Polyphenols with Maltodextrin Enhances Their Stability during In Vitro Digestion

Table 1

Central composite design used to optimize the microencapsulation process of oregano (Lippia graveolens) phenolics.

	Factor levels
Independent factors	-1.41421	-1	0	1	1.41421
X1: temperature (°C)	111.7	120.0	140.0	160.0	168.2
X2: wall material (%)	5.8	10.0	20.0	30.0	34.1