Perhaps you should take a little more time reading and a little less time posting. This was their product
Clinical Examination and Laboratory Methods
The intervention agent was 200 µg of selenium daily, supplied in a 0.5-g, high-selenium baker’s yeast tablet provided by Nutrition 21 (La Jolla, California) through 1995 and by Cypress Systems (Fresno, California) thereafter. The placebo group received a tablet containing yeast only. Selenium and placebo pills were coated with titanium oxide to ensure identical appearance and smell.
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