Table 3.

Comparison of data on Gly, AMPA, and Glu in honey and other hive products reported in different studies (range, mean and median are expressed in µg/kg).

Matrix	Ref.	Origin	Analyte	Total Sample (Number)	LC %	Quantifiable Samples
						Number	%	Range	Mean	Median
Honey	[36]	Argentina	Gly	30	50	15	50	2.0–27.5	n.r.	n.r.
			AMPA		70	9	30	1.9–18.1	n.r.	n.r.
Honey	[51]	New Zealand	Gly	360	79	78	21	n.r.	n.r.	n.r.
Honey	[37]	Italy	Gly	84	50	42	50	10–34	17.1	n.r.
Honey	[52]	Various EU countries	Gly	115	94	7	6	29–5500	1153	270
			AMPA	35	100	0	-	-	-	-
			N-Acetyl Gly	1	100	0	-	-	-	-
			Glu	14	100	0	-	-	-	-
			N-Acetyl Glu	1	100	0	-	-	-	-
Honey	[53]	Pakistan	Gly	25	80	5	20	440–3500	2004	n.r.
Honey	[39]	Belgium	Gly	10	90	1	10	11	11	11
			AMPA		100	0	0	-	-	-
Honey	[54]	Italy	Gly	98	100	0	0	-	-	-
			AMPA		100	0	0	-	-	-
			Glu		100	0	0	-	-	-
Honey	[41]	Brazil	Gly	40	63	15	37	40–220	n.r.	70
			AMPA		98	1	2	20–100	-	-
Honey	[55]	EU	Gly	249	93	17	7	n.r.	n.r.	n.r.
Honey	[8]	Italy	Gly	176	50	88	50	10–790	n.r.	n.r.
Honey	[42]	Italy	Gly	10	100	0	0	-	-	-
			AMPA		100	0	0	-	-	-
			Glu		100	0	0	-	-	-
Honey	[43]	Uruguay & EU countries	Gly	32	19	26	81	n.r.	n.r.	n.r.
			AMPA		100	0	0	-	-	-
Honey	[34]	Canada	Gly	200	2	197	98	1–49.8	n.r.	4.9
			AMPA		1	198	99	1–50	n.r.	10.3
			Glu		38	125	62	1–33	n.r.	1.4
Honey	[56]	EU	Gly	157	94	9	6	n.r.	n.r.	n.r.
Honey	[44]	USA (Hawaii)	Gly	59	73	16	27	15–342	33.5 LB 118.3 UB	n.r.
Honey	[46]	Switzerland	Gly	16	6	15	94	1–15.9	4.6	3
			AMPA		100	0	0	-	-	-
Honey	[57]	EU	Gly	186	87	24	13	n.r.	n.r.	n.r.
Honey	[48]	Estonia	Gly	33	36	21	64	14–62	44	n.r.
Honey	[47]	USA	Gly	16	44	9	56	n.r.	n.r.	n.r.
Honey	[35]	USA	Gly	69	41	41	59	17–63	n.r.	n.r.
Beebread	[37]	Italy	Gly	84	46	45	54	10–542	n.r.	n.r.
Beebread	[39]	Belgium	Gly	81	9	74	91	10–700	55.5	26
			AMPA		82	21	18	10–250	67.1	44
Wax	[39]	Belgium	Gly	100	68	32	32	10–320	62	36
			AMPA		100	0	0	-	-	-

LC, left-censored; n.r., not reported.