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Yes, it's also true that people with "Dr." in their names write all kinds of books; especially books on nutrition. Example: the book titled "Dead Doctors Don't Lie" by Dr. Wallace. However what those authors say in their books are nothing but opinions. It is you, the reader, who needs to separate the wheat from the chaff. One of the most challenging tasks of reading books involves sorting through a seemingly endless stream of opinions on pretty much everything.
Sorry, there are no 125 mg (milligram) Selenium tablets that I know of. It's far more likely that each of those tablets contain 125 mcg (microgram) Selenium.
Further, in the last 3 months I've been taking 300 mcg a day of Selenium. But, as to my age spots (a.k.a. sun spots, and moles), this protocol has done nothing for me. Therefore, if you're taking 300 mcg Selenium per day for 3 months for your age spots, liver spots, or moles, you're wasting your money. Ditto for a dose of 200 mcg per day for 3 months.
I hope this will help somebody!