October 27th, 2020 
Word Limit: 400 words Please only read the introduction and conclusion to answer these questions
Q1. The conclusion states that good biomarkers for Zn levels in humans are serum thymulin and erythrocyte metallothionlin. What are biomarkers and how are they helpful at identifying health issues? Are there any others that you know of or are mentioned in this paper?
Q2. Why do you think that older people, especially those suffering from diabetes, should have a greater intake of calcium than the rest of the population?
Q3. This review is from 1994 and cite studies from the 70s and 80s. In your opinion, do you think we can still trust this research? If not, how might it still be helpful for us scientists today?
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