

As someone who enjoys growing and studying about many many different kinds of carnivorous plants, don’t worry too much about feeding them, instead make sure you get them enough lighting and good water supply through good quality substrate (not something that’s been decomposing for 3+ years and turning into mulch) with adequate aeration. The need for metabolic energy always comes first before nutrition (which is what these plants get from eating meat), same concept to how not having access to oxygen to breath is a lot more dangerous to a human or animal than being malnourished.
Happy growing! :D
But it was originally derived from coal gas back in the 3rd quarter of the 19th century, when the first internal combustion engine for transportation application was being developed.