Table 1: Metal Levels in Blood, Hair and 24-Hour Urine Samples

Laboratory Investigation Number of ALS Subjects Mean Level--ALS Subjects (units) Standard Deviation (SD) Normal Range
Urine
Arsenic 110 52.3 (mcg/L) 66.1 0 – 80 mcg/L
Lead 110 13.7 (mcg/L) 10.9 0 – 50 mcg/L
Mercury 112 8.9 (mcg/L) 2.7 0 – 20 mcg/L
Cadmium 98 0.9 (mcg/L) 2.9 0 – 3 mcg/L
Thallium 79 0.9 (mcg/L) 1.8 0 – 2 mcg/L
Cobalt 70 0.5 (mcg/L) 0.1 0 – 2 mcg/L
Aluminum 8 12.9 (mcg/24 hr) 8.9 7 – 40 mcg/24 hr
Serum
Lead 86 4.2 (mcg/dL) 2.9 0 – 25 mcg/dL
Arsenic 6 10 (mcg/L) 0 0 – 60 mcg/L
Mercury 6 15.2 (ug/L) 6.4 0 – 50 ug/L
Hair
Lead 4 1.9 (ug/GM) 2.6 0 – 0.99 ug/GM
Arsenic 5 0.2 (ug/GM) 0.4 0 – 0.9 ug/GM
Mercury 5 1.7 (ug/GM) 1.1 0 – 24.9 ug/GM
Serum Ferritin
Male 6 668.0 (ng/mL) 785.1 22-322 ng/mL
Female 6 237.2 (ng/mL) 180.3 10-291 ng/mL