The main tasks for post-doctoral fellow include research in pharmacokinetics and clinical pharmacology, especially in drug metabolism, pharmacokinetics, and pharmacogenetics.
They contain an accumulated body of knowledge, including about geography, zoology, mathematics, navigation, astronomy, pharmacology, botany, meteorology and more.
This can be a difficult step depending on your understanding of biochemistry and pharmacology, but that doesn't mean the concepts are out of your reach.
And as I mentioned the previous video, I've used this to memorize specific facts, like stuff like in anatomy and pharmacology but also quotes for essays.