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Table 1 Mineral composition of Sierrasil and the expected intake at the low (2 g/day) and high (3 g/day) doses. Mineral bioavailability in the various forms has not been established but data on acid liberalization suggest that for some minerals the dose available for absorption may be as low as < 0.1%.

From: Early relief of osteoarthritis symptoms with a natural mineral supplement and a herbomineral combination: A randomized controlled trial [ISRCTN38432711]

Metal assays (ICP-MS) Total Intake at 2 g/day dose Total Intake at 3 g/day dose
Aluminum 188 mg/day 282 mg/day
Antimony < 0.006 mg/day < 0.009 mg/day
Arsenic 0.026 mg/day 0.035 mg/day
Barium 2.0 mg/day 2.9 mg/day
Beryllium < 0.002 mg/day < 0.003 mg/day
Bismuth < 0.06 mg/day < 0.09 mg/day
Cadmium 0.0036 mg/day 0.0054 mg/day
Calcium 26 mg/day 40 mg/day
Carbon 0.60 mg/day 0.90 mg/day
Chromium 0.040 mg/day 0.060 mg/day
Chromium (VI) < 0.00048 mg/day < 0.00072 mg/day
Cobalt 0.017 mg/day 0.026 mg/day
Copper 0.074 mg/day 0.11 mg/day
Iron 119 mg/day 178 mg/day
Lead 0.013 mg/day 0.020 mg/day
Lithium 0.02 mg/day 0.03 mg/day
Magnesium 11 mg/day 17 mg/day
Manganese 0.29 mg/day 0.44 mg/day
Mercury 0.0012 mg/day 0.0017 mg/day
Molybdenum 0.002 mg/day 0.003 mg/day
Nickel 0.027 mg/day 0.040 mg/day
Phosphorous 3.8 mg/day 5.7 mg/day
Potassium 20 mg/day 30 mg/day
Selenium 0.0030 mg/day 0.0045 mg/day
Silica 899 mg/day 1349 mg/day
Silver 0.015 mg/day 0.022 mg/day
Sodium < 12 mg/day < 18 mg/day
Strontium 2.1 mg/day 3.2 mg/day
Sulphur 30 mg/day 45 mg/day
Thorium < 0.010 mg/day < 0.015 mg/day
Tin < 0.02 mg/day < 0.03 mg/day
Titanium 10 mg/day 15 mg/day
Uranium < 0.12 mg/day < 0.18 mg/day
Vanadium 0.34 mg/day 0.51 mg/day
Zinc 0.082 mg/day 0.12 mg/day
Zirconium 0.23 mg/day 0.35 mg/day