!['Ben Greenfield Tests His Body'](https://cdn-img01.wefitnessblog.com/images/47-m/203/203557.jpg)
'Getting a home test kit for Vitamin D, Testosterone/Cortisol ratios, magnesium/calcium levels, essential amino acids, metabolic type, and ferritin levels. E-mail [email protected] to learn how.'
Tags: Vitamin D , blood type , essential amino acids , home test kit , magnesium/calcium levels , metabolic type , ferritin levels , iron testing
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