Shampoos or prescription solutions containing selenium sulfide are used for treatment of fungal infections,
including tinea capitis. Selenium helps to block the undesirable absorption of cadmium, mercury and arsenic.25
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Meschino Health Comprehensive Guide to Minerals
Dosage Ranges and Considerations
Purpose
Daily Dosage
General Support (Adults)
50-200 mcg is often
recommended25
Arthritis
100-200 mcg19,20
Heart Disease
100-300 mcg25
Cancer Support
200-400 mcg5
HIV-Infection and Immune Compromised States
100-300 mcg16,17
Side Effects and Toxicity
Selenium is considered extremely safe up to 1000 mcg per day.18 Populations routinely ingesting 500 mcg or more
per day show no signs of toxicity.5 However, some reports suggest that doses as low as 900 mcgs daily over a
prolonged period of time can produce signs of selenium toxicity (depression, nervousness, nausea, vomiting, garlic
odour to breath and sweat, loss of hair and fingernails, abnormal nails and skin depigmentation).6 High dose
supplementation may exacerbate low thyroid function.26
Drug-Nutrient Interactions
The following drugs have been shown to deplete selenium status:
1. Corticosteroid drugs27