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Weight loss chat

A space to talk openly about weight loss journeys and challenges. Mumsnet hasn't checked the qualifications of anyone posting here. You may wish to speak to a medical professional before starting any diet.

Can someone explain water weight loss please

5 replies

KilliMonjaro · 28/11/2025 07:09

Why does this happen?
How do you know it’s water?
Will it come back?
If so, why?
I just don’t understand…

OP posts:
Katrinawaves · 28/11/2025 07:17

I’ll give it a go!

Everyone’s body contains a lot of water for multiple reasons. This includes due to eating too much salt and a by product of eating carbs.

When you start to reduce the amount t you eat, there is a reduction in glycogen which means that in the first few days you will notice that you pee more and your water levels drop, causing the scales to drop by a few pounds. This means that if the scales are down say 4lbs in the first week of dieting, it’s likely that only 1lb of this will be actual fat loss and the rest will be water.

Your water levels will continue to fluctuate as you diet which is why the scales can go up and down. If you’ve ever had the experience of eating a large meal or having a few alcoholic drinks and see the scale bounce up overnight, that’s not due to having put fat on but just water fluctuation which is why it usually comes off as quickly as it went on.

HoppingPavlova · 28/11/2025 07:22

????? On average, adults bodies are approx 60% water (of course variation for sex, age and other factors). Some people have more due to fluid retention or other factors. So weight loss due to water is the quickest form of weight loss as do easily achieved, but it’s neither healthy nor sustainable, more of a silly quick temporary fix.

KilliMonjaro · 28/11/2025 07:42

Thanks @Katrinawavesthat helps.
I do eat low carb so that’s good!
I find the scales jumping up and down a bit alarming. Apparently men have a much more linear loss.

OP posts:
KilliMonjaro · 28/11/2025 07:43

HoppingPavlova · 28/11/2025 07:22

????? On average, adults bodies are approx 60% water (of course variation for sex, age and other factors). Some people have more due to fluid retention or other factors. So weight loss due to water is the quickest form of weight loss as do easily achieved, but it’s neither healthy nor sustainable, more of a silly quick temporary fix.

Why silly? It’s not really intentional.

OP posts:
JustMyView13 · 29/11/2025 08:05

KilliMonjaro · 28/11/2025 07:42

Thanks @Katrinawavesthat helps.
I do eat low carb so that’s good!
I find the scales jumping up and down a bit alarming. Apparently men have a much more linear loss.

Weigh yourself daily & record it in your phone’s health app. Pay absolutely no attention to the actual number, but review the graph on a weekly basis to make sure your weight is trending downwards. As women, our weight fluctuates for a whole bunch of scientific and random unexplainable reasons. I find following trends much more informative & much less demoralising.

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