In this week’s column by UTMB’s Dr. Victor S. Sierpina: Despite its beauty and utility, mercury is dangerous, especially methyl mercury, which is highly absorbable by humans. … Studies have shown that fish oil supplements in general contain very little mercury. Nonetheless, supplements of fish oil need to be labeled to give consumers a level of mercury and other contaminants. That is why I recommended Nordic Natural and Spectrum products as my preferred choices for fish oil.