What happens to the body in the first two weeks

The body stores carbohydrates as glycogen, and every gram of it holds water. When there are few carbohydrates in the daily diet, the store is used up, and the water leaves with it.

This is good news and a trap at the same time. The good news is that swelling goes down: in the face by morning, in the fingers where rings fit, and in the legs by evening. The trap is that after one or two weeks this source runs out, the weight plateaus, and it seems that the method has stopped working. It has not: fat changes next, and it is lost more slowly and not in a straight line.

For some people — nothing noticeable. For others — headache, weakness, drowsiness, irritability, or changes in bowel movements.

The so-called “keto flu” does not occur in everyone and lasts from several days to several weeks. There are two reasons: adapting to a new fuel and losing salts along with fluid.

Eat normally. The most common mistake is to combine a new diet composition, a strict calorie deficit, and a new training routine all in one day. Then weakness is guaranteed, and it is unclear what caused it.

Drink enough: about two liters of fluid per day as a guideline, more in hot weather and on training days. Keep salt at around 3-5 g per day, but do not increase it on your own “just in case”.

If your diet used to be low in fat, start with half or a third of the recommended fat portions.

Initial headaches and weakness usually subside, if they occurred at all. Appetite becomes more even: you stop craving a snack an hour after eating.

This is an observation, not a schedule. For some people, the second week is no different from the first, and that does not mean that anything is going wrong.

There is no proven timeframe. A schedule such as “the first week — water, the second — energy, the third — cravings disappear” is not given because no such calendar exists.

The honest wording is: the first noticeable changes in appetite and well-being often appear within one to three weeks, but this is individual and is not a measure of success. For some people, there is no significant change in their craving for sweets at all.

You must not start on your own during pregnancy or breastfeeding, with type 1 diabetes, or with type 2 diabetes if you take insulin or medications that carry a risk of hypoglycemia.

Chronic kidney disease, gallbladder removal, eating disorders, and adolescence should be discussed separately with a doctor.

Nothing urgent. The absence of vivid sensations in the first weeks is normal and is not a sign that the approach is not working.

For some people, the transition is barely noticeable: there was no headache, weakness, or sharp drop on the scales. This is more common among those who previously ate little sugar.

In this case, look not at sensations but at objective signs: has the swelling gone down, has it become easier to maintain a pause between meals, and has the afternoon slump disappeared?

After a week to a week and a half, and with your usual workload rather than a new one.

In the first days, glycogen is used up and the water-salt balance changes — against this background, a hard workout causes weakness that will later be blamed on the diet.

If you already train, you do not need to stop: reduce the intensity for the first week and keep protein at the upper end of the range, closer to 1,6 g per kilogram of body weight.

There is no such standard, and any “minus one kilogram per week” figures are someone else’s numbers.

The first week almost always looks impressive because of water. After that, the pace slows down, and this is not a malfunction. Weight changes in steps: two weeks without movement followed by a sharp shift is a common pattern.

Therefore, it is pointless to evaluate the first two weeks by the scales. Swelling, energy, and hunger stability will tell you more.