Table 1. Formulation of a grain drink supplement containing lactic acid bacteria-fermented purple sweet potato powder

	Con1)	G1	G2	G3	G4
Lab-fermented purple sweet potato powder (g)	0	2.5	5	7.5	10
Roasted grain powder (g)	3.5	3.5	3.5	3.5	3.5
Oat powder (g)	5.0	3.75	2.5	1.25	0
Black soybean powder (g)	5.0	3.75	2.5	1.25	0
Apple powder (g)	8.05	8.05	8.05	8.05	8.05
Pumpkin powder (g)	2.5	2.5	2.5	2.5	2.5
Sugar (g)	0.95	0.95	0.95	0.95	0.95
Total amount (g)	25	25	25	25	25
Milk (mL)	200	200	200	200	200

Con, grain drink with 0% lactic acid bacteria-fermented purple sweet potato powder; G1, grain drink with 10% lactic acid bacteria-fermented purple sweet potato powder; G2, grain drink with 20% lactic acid bacteria-fermented purple sweet potato powder; G3, grain drink with 30% lactic acid bacteria-fermented purple sweet potato powder; G4, grain drink with 40% lactic acid bacteria-fermented purple sweet potato powder.