Table 5. Total flavonoid and polyphenol contents of cheonggukjang added with brewer’s spent grain

Addition ratio of BSG (%)	Total flavonoid (mg QE1)/g)	Total polyphenol (mg GAE2)/g)
0	17.04±0.443)NS4)	28.97±0.59d5)
5	17.53±0.21	31.60±0.62c
10	17.60±0.12	33.39±0.91b
15	17.04±0.33	35.48±0.82a

QE, quercetin equivalent.
GAE, gallic acid equivalent.
Values are mean±SD (n=3).
NS, not significant.
Values with different superscript letters (^a-d) in the same column are significantly different at p<0.05 by Duncan’s multiple range test.