Originally published by Time on June 1, 2026 Author: Alana Semuel “If you want to gorge yourself on protein, as many people do these days, you have options like beef and chicken, soy and legumes, protein powders, and, of course, leaves. The last one may not be something you know much about, but the protein found in leaves, called rubisco, is the most abundant protein on the planet. As demand for protein surges, entrepreneurs are pushing to get rubisco into people’s mouths.