Analysis of Caffeine and Antioxidant Content of Ethiopian Coffee Varieties from Different Growing Areas

Table 2

Results of caffeine, total antioxidants (TAC), and total polyphenol content (TPC) of coffee samples (). Letters a, b, c, and d indicate significant differences ().

Coffee varieties	Caffeine content (mg/g dw)	TAC (mg AAE/g dw)	TPC (mg GAE/g dw)
Heirloom	^b	^a	^a,c
Forest coffee	^b	^b	^a,c
Heirloom 2	^b	^c	^b
Bourbon	^b	^d	^a,b,c
Mixed heirloom	^b	^c	^a,b,c
Catuai	^b	^d	^c