Determination of lipophilic vitamins. Vitamins A and E were extracted from plasma samples with n-hexan. The lipid phase was dissolved in isopropanol and separated by HPLC. We measured vitamin K1 ...

I showed that the fly’s ninaB gene is essential for visual chromophore synthesis from carotenoids and encodes the long-sought after vitamin A forming enzyme. Additionally, I identified the first ...

Yadav said that vitamins could be administered transdermally, but only if they were formulated as nanoparticles and encased in a lipophilic (fat-soluble) substance. Since vitamins are not ...