Lower-carbohydrate eating
What it is
Fewer carbohydrates than a typical diet — roughly fifty to a hundred and thirty grams a day, or under about a quarter of your energy — without going as far as ketosis, which has its own page. Sugar goes; bread, pasta, potatoes, rice and fruit are limited rather than banned. It is the moderate end of a spectrum, and most of what people call "low-carb" lives here.
How it works in practice
Cutting carbohydrate usually does three things at once. It removes the most convenient high-energy foods, so intake tends to fall without counting. It raises the share of protein, which fills. And it empties the body's glycogen stores in the first days, which takes a noticeable amount of water with them — at least three grams of water for every gram of glycogen. That last one is why the scale drops fast in week one and why that drop is not fat.
What the evidence shows
At twelve months, a healthy lower-carbohydrate diet and a healthy lower-fat diet produced the same result in a trial of 609 adults — about six kilograms lost in each group — and neither genotype nor insulin secretion predicted which suited whom. The Cochrane review of lower-carbohydrate against balanced-carbohydrate weight-loss diets reaches the same conclusion across trials: little or no difference in weight change over three to eight and a half months and over one to two years, including in people with type 2 diabetes. The network meta-analysis of named diets agrees: at six months most patterns work modestly; at a year they converge.
So the grade is A for the claim this page actually makes: lower-carbohydrate eating is not better than a balanced diet at a year with an equal deficit. The faster start is real and graded B; the effect on appetite varies by person and carries no number here.
Who it tends to suit
People who find that bread and sweets are the foods they cannot stop eating, so that removing them is easier than moderating them. People who like meat, eggs, cheese and vegetables and do not miss the rest. People who need a visible early result to stay motivated — as long as they know what that result is made of.
How it most often fails
"Low-carb" with unlimited fat and no deficit: the plate changes, the energy does not. Fibre quietly disappears with the grains and fruit, and with it the fullness that made the pattern work. Social fatigue — a year of declining bread at every table. And the first-week water loss mistaken for a trend, followed by disappointment in week three.
What to watch
Fibre, first — vegetables, nuts, seeds and legumes have to replace what the grains supplied, and the planning target of fourteen grams per thousand kilocalories does not lower itself because the carbohydrate did. Protein, because "low-carb" does not automatically mean enough of it. If you take medication for diabetes, the dose that was right on a high-carbohydrate diet is not right on this one — the source above is explicit that medication needs fall quickly, and adjusting them is a doctor's job.
In the app
The app knows the pattern by name and has no reviewed, verifiable rule for it yet; choosing it steers the planner without guaranteeing every day. The balanced policy is the only one the app currently verifies.