Table 1.

The formulation of purple sweet potato and soybean (PSPS) snack bars.

Ingredients			Formulation (g)
	P1	P2	P3	P4	P5
Purple sweet potato	72	64	56	48	40
Soybean	8	16	24	32	40
Wheat flour	20	20	20	20	20
Margarine	10	10	10	10	10
Egg yolk	30	30	30	30	30
Skim milk	10	10	10	10	10
Brown sugar	4	4	4	4	4
Vanilla	0.5	0.5	0.5	0.5	0.5
Maltodextrin	2	2	2	2	2
Sum	156.5	156.5	156.5	156.5	156.5

P0 (commercial snack bar); P1 (90% purple sweet potato : 10% soybean); P2 (80% purple sweet potato : 20% soybean); P3 (70% purple sweet potato : 30% soybean); P4 (60% purple sweet potato : 40% soybean); P5 (50% purple sweet potato : 50% soybean).