Selenium is an essential nutrient and antioxidant that protects cell membranes from damage. However, too much selenium can damage the nervous system, cause anxiety and fatigue. Brazil nuts may contain as much as 544 µg of selenium per ounce. It is wise to eat Brazil nuts only occasionally because of their unusually high selenium content. If the recommended dietary allowance (RDA) is 70 µg, calculate the amount of percent of daily intake if 9.21 g are eaten in one day? (1 ounce = 28.35 grams)
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Start by converting 544 µg/ounce into µg/gram.
544E-6 / 28.35 g = 1.92E-5 grams of Se/ gram of nuts.
Then multiply by the amount of nuts. 1.92E-5 * 9.21g = 1.77E-4=177µg of Se consumed.
Now take 177µg/70µg *100% to get the percent daily intake.
% Daily Intake = 253%
544E-6 / 28.35 g = 1.92E-5 grams of Se/ gram of nuts.
Then multiply by the amount of nuts. 1.92E-5 * 9.21g = 1.77E-4=177µg of Se consumed.
Now take 177µg/70µg *100% to get the percent daily intake.
% Daily Intake = 253%