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Table 5 Comparison of daily intake of metals from ginger with recommended daily intake and tolerable upper limit of daily intake of metals (NebGuide 2015 )

From: Levels of essential and non-essential metals in ginger (Zingiber officinale) cultivated in Ethiopia

Metal Daily intake from ginger (mg/day) Recommended daily intake (mg/day) Allowable upper limit (mg/day)
Ca 2.36 1000 2500
Mg 2.00 400 350
Cu 0.0195 2 10
Zn 0.350 0.150 40
Mn 3.71 2 11
Ni 0.047 NA 1
Fe 34.1 18 45
Co 0.0992 NA NA
Cr 0.132 0.120 NE
Cd 0.000813 None 0.0714
Pb ND None None
  1. NA = data not available. NE = not established. ND = not detected.