Protein is a macronutrient, a family of molecules made of amino acids. It is found in many different food items like meat and legumes. Even grains and leafy vegetables have some. Plant-based or animal-based proteins have varying amounts of protein and are not an even swap.
Protein is also colloquially referred to like food that used to be known as the "meat group" like fish or beef.
It's beyond strange that so many humans are clueless about how they should feed themselves. Every wild species on the planet knows how to do it; presumably ours did, too, before our oversized brains found new ways to complicate things. Now, we're the only species that can be baffled about the "right" way to eat.
The best vegetables are likely to be fresh and locally sourced, but flash frozen is nearly as good (as freezing delays aging). Those “fresh” vegetables that spend a long time in storage or transit are probably the least nutritious.
Perhaps the world's healthiest diet, the Mediterranean Diet is abundant in fruits, vegetables, whole grains, legumes and olive oil. It features fish and poultry-lean sources of protein-over red meat. Red wine is consumed regularly but in moderate amounts.
No British train station or high street would be complete without a Greggs bakery. The merchants of mass-produced pastries are as quintessential as they come. And last year they won plaudits for turning vegan. On the back of their success, other fast food brands shortly followed suit.
Plant-based protein sources are not the same as animal protein sources. Proteins are made up of amino acids which are the building blocks of every cell and hormone in our body. Meat protein contains all nine essential amino acids, whereas plant-based protein usually lacks at least one of the nine essential amino acids our body needs.
Unripe jackfruit makes a convincing choice for pulled pork alternatives, curries and burgers. But it is almost valueless if you needed protein since jackfruit consists of carbohydrates. Vegan burgers are made up of beans, but this is not a complete protein source.