“But Where Do You Get Your Protein?”

For anyone who follows a vegetarian or vegan diet, this question is as inevitable as the sunrise. It often comes from a place of genuine curiosity, rooted in a food culture where meat has long been crowned the undisputed king of protein. This single question, however, encapsulates a widespread and persistent anxiety surrounding plant-based eating: the fear of missing out on this essential nutrient.

An Enduring Metaphor for All Life

In 1837, in a small, leather-bound notebook, the young naturalist Charles Darwin drew a simple, spindly sketch of a branching diagram. Above it, he scrawled two tentative words: “I think”. This humble drawing, a mere thought experiment, would grow to become the central organising metaphor for all of modern biology. It was a visualisation of a radical idea: that all life on Earth is related, diverging from common ancestors over immense spans of time, just like twigs and branches from the trunk of a great tree.