Curious about the design behind nih.gov? SiteFontCheck scanned their live CSS architecture and identified 2 unique font families. The website relies heavily on <source sans pro web, helvetica neue, helvetica, roboto, arial, sans-serif> for its main text elements, paired with <merriweather web, georgia, cambria, times new roman, times, serif> as fallback options. Below is the precise map of font sizes, weights, and text elements used across their site.