Let us be fair to it at once. Protein is an essential nutrient. It helps us feel full, supports the maintenance and growth of muscle, and does important work throughout the body. Its popularity is not a mass delusion. The same goes for the approaches that came before it. Low-carbohydrate and ketogenic diets suit some people and some purposes well. Vegetarian and vegan eating can rest on nutritional reasons, ethical convictions, or both, and those convictions are anything but a passing mood. Something can be genuinely useful without being new, and without being right for everybody.
What interests me is not the ideas themselves but the way they travel.
Nutrition moves in waves. At one time fat was the problem, at another carbohydrates, and now protein is the answer. Each wave arrives with the feeling that we have finally understood something our grandparents missed. Books, social media, articles and shelf labels all repeat the message until it seems to be simply how people eat now. Yet the knowledge underneath is rarely a bolt from the blue. It is usually something established, sensible and a little modest, which has been simplified, amplified and polished until it looks like a revelation.
There is a real difference between a scientific development and the way it reaches the shopper. Research tends to be careful, cumulative and full of "it depends". Communication tends to prefer a single sentence. Between the two, much of the nuance quietly disappears. Individual needs differ, and there is seldom one formula that suits everyone, but "it depends" does not fit on the front of a packet.
This is where the commercial side enters, and it deserves a calm look rather than a scowl. When an idea becomes fashionable, the food industry sees an opportunity, which is what industries do. Existing products are reformulated, repackaged or topped up. New categories appear, often built around a single prominent keyword. "High protein" now describes everything from puddings to snacks to ready meals, much as "low fat" once did, and "low carb" after it.
Some of these products are useful. A busy person who wants a convenient source of protein after a workout may be well served by one, and there is no shame in convenience. Others are highly processed and offer little advantage over an ordinary alternative. Not every manufacturer is cynical, and not every new product is unnecessary.
The pattern is still worth noticing. A trend becomes a reason to buy something new, even when the need behind it could often be met by foods we already know. Lentils, beans, eggs, tofu, nuts, yoghurt and wholegrain bread were providing protein long before it had a marketing department. The cycle is simple: novelty creates desire, desire creates purchases, and soon another novelty is needed. Our bodies are rarely the ones asking.
So what about ordinary food? It lacks glamour, I admit. Fruit, vegetables, pulses, whole grains, nuts and seeds do not come with a slogan. But they offer a broad nutritional foundation without needing to be reinvented around the latest keyword. To be accurate, this is not because processing is a sin or because our bodies can sense some magic in the "natural". A processed food can be perfectly nutritious, and an unprocessed one can be eaten badly. The advantage is more practical. Familiar, simple ingredients make it easier to build balanced meals and to understand what is on the plate. There is less to decode.
Variety, sensible portions and attention to overall quality will serve most people better than a constant chase after individual nutrients. This is hardly thrilling advice, and that may be exactly why it keeps getting lost.
It is also where the Waterlike Method sits, quietly. It does not ask anyone to join a camp. You may be vegetarian, vegan, low-carb, ketogenic or none of these, and still use it. It offers a flexible structure for food choices and portions, built on ordinary foods, reasonable quantities and a way of eating you can keep up. It is not meant as the next big discovery. If anything, it is a small refusal to keep reinventing how we eat.
Protein matters. Particular diets can work. Some new products are convenient and good. But a steady stream of new products does not prove we have found a better way to nourish ourselves. The most useful foundations tend to stay surprisingly familiar, and the best news about them is that they never need a relaunch.