Table 2.

Contents of isoflavonoids according to the growing years and parts of Pueraria lobata.

Year	Thickness (mm)	Contents of isoflavonoids (%)
		Daidzein	Genistin	Daidzin	Puerarin
1	4–5	Trace	Trace	0.09	0.14
	5–6	Trace	Trace	0.36	0.66
	7–8	0.01	Trace	0.5	0.72
	10–12	0.02	Trace	0.7	1.05
	15–20	0.04	0.01	0.93	1.45
2	20–25	0.07	0.02	1.22	1.86
3	25–30	0.1	0.03	1.70	2.15
4	30–35	0.17	0.04	2.00	2.34
5	35–50	0.14	0.03	3.17	2.40