Is it working if the scale is not moving?

The month-three question

You have been doing everything right. The scale has not moved in three weeks. And the thought arrives: is this even working?

Here is an honest answer, including the part most articles leave out.

What the big trial found

The main semaglutide weight trial followed 1,961 adults for 68 weeks¹. Average weight change was −14.9%, against −2.4% on placebo.

But averages hide people. The same trial reported how many reached each level:

Two ways to read this, and you need both — plus a detail about the denominator that changes the second one.

The encouraging way: about half of the women and men still being measured at 68 weeks had lost 15% or more. Most had lost at least 10%.

The honest way: 13.6% of them had not reached even 5%.

And the more honest way still. Those percentages are calculated from the people still being measured at the end — roughly 1,212 in the treatment group, not the roughly 1,307 who were randomised to it. Counting everyone who started, about one in five has no recorded 5% loss at 68 weeks.

That is the number I would want, and it is not the flattering one. If you are in that group you are not doing it wrong, and it is more useful to know the group is that big than to be told this always works.

Things that are not the scale

Weight is one measurement and a noisy one. Before you decide it is not working, check these:

• Clothes. Especially waistbands and sleeves. Body shape changes on a different timetable to weight.
• Food noise. Many women notice the constant thinking about food quieting before the scale does. That is a real effect and it is often the first one.
• Portions. Are you finishing less without deciding to?
• Your measurements. A tape measure around your waist tells you something the scale cannot.
• Your numbers. If you had raised blood sugar, blood pressure or cholesterol, ask what those are doing now. Improvements there count even in a month the weight does not move.

Reasons the scale sits still

• You are not at your full dose yet. The early doses exist to let your body adjust, not to produce results. Most of the effect comes later.
• Water, salt, hormones and your cycle move weight by a kilo or two in either direction, which is enough to hide real progress for a week or three.
• Constipation does exactly what you would expect to the number on the scale.
• You are eating more than it feels like, which is very common once nausea settles and food becomes pleasant again.
• Plateaus are normal. They happen and then they end.

When to actually raise it

Weigh yourself weekly at the same time, not daily, and look at the trend across a month rather than week to week.

Then raise it with whoever prescribes for you if:

• You have been at your full maintenance dose for a few months and nothing has changed on any measure — not weight, not clothes, not appetite.
• You are having side effects with no benefit at all.
• The number is going up steadily rather than sitting still.

Those are worth a real conversation, because the options include a different dose, a different medicine, or looking for something else going on — such as a thyroid problem or a medication that works against you.

What not to do

Do not stop it on your own to see what happens. Do not double a dose to catch up. Do not add anything you bought online because a forum suggested it.

And do not decide at week three. Three weeks is not a signal; it is weather. Give it a month at a steady dose, look at the trend, and take the question to your prescriber rather than the scale.