Yang Shi didn't have any proficiency in pill refining, but it doesn't impact on making elixirs. After extracting the essence, the hardest part of making an elixir is calculating the proportion and the effects of mixing the essence of different herbs.
" Let's start with Body Cleansing Elixir." Yang Shi thought.
Even without the memory of the Samsara Emperor, Yang Shi got a good amount of knowledge about various elixirs in the ancient records of Earth.
Since the Earth didn't have anything like alchemical pills, the most viable things were elixirs.
There were various types of elixirs used in ancient times, like- Longevity Elixirs, which can revitalize human cells and extends lifespan. Various types of rare and exotic herbs were used to make these elixirs.
There were Body Strengthening Elixir, Disease Repelling Elixirs, Poison Curing Elixir, Sense Enhancing Elixirs recorded in various tomes.