>>At steady state condition, the serum Iodide levels expected for patients receiving 50 mg iodine/day should be approximately: serum Iodide (mg/L) = daily intake (mg) / 43.5 Liter = 50 mg / 43.5 = 1.15 mg/L. If patients continue to excrete low levels of Iodide after orthoiodosupplementation for 3 months, serum inorganic iodide levels are indicated to assess whether this is due to decreased absorption or increased demand. Malabsorption of iodine/iodide would result in very low serum inorganic iodide levels (10-8M) in the presence of low urinary excretion. We have not observed a case of malabsorption of Iodine yet, when Iodine supplementation was in the range of 12.5 to 50 mg/day."
The dosage that she regularly used was 6 drops to ¼ - ½ cp water after meals and at bedtime has been given to people in the past in dosages of 2/3 tsp or 60 drops for thyroid disease.