Enzymes developed in plants originate from a natural source. it may be said animal-based mostly enzymes come from the pancreases of animals, which might make them natural. et al.  Cloning and sequencing of your genes https://biobodyboost.co.uk/products/enzymextreme-plant-derived-enzymes?_pos=1&_psq=enzyme&_ss=e&_v=1.0