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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

To think that women don't actually need 2000kcal a day

306 replies

Croissantsfordinner · 07/04/2025 08:57

I am barely losing weight eating 1600kcal a day and most of the people I know who are slim and fit definitely do not eat 2000kcal (I am referring to family, friends, colleagues, what I read here on MN and also celebrities diet, lol). So where does this guideline come from?
Unless you are almost an athlete, I don't think all those calories are actually needed, AIBU?

OP posts:
theressomanytinafeysicouldbe · 07/04/2025 11:46

On average according to my fitbit I burn around 2100cals a day, I think 2000 is a average, I suppose everyone is different.

Screamindreamin · 07/04/2025 11:45

I could probably maintain on about 1500, post meno, however I've probably been eating more like the 2000 and Put on about 3 stone over the years, I now need to shift it and am aiming for less than a thousand calories a day which is actually not very much when broken down into meals, it is shifting though and when it's gone I could add a bit more but no alcohol or treats fucking miserable lol but I hate being fat so needs must.

rosemarble · 07/04/2025 11:43

I take what my Garmin says with a large pinch of salt, and I also have no idea how many calories I eat.

That said, I think I probably do need about 2000 cals a day. If I do no proper exercise my garmin tells me I've used about 1700. An 8 mile run or a 2 hr bike ride and it'll go up to about 2500.

I am tall and slim and follow my hunger food wise. I quickly drop weight if I don't follow my hunger (which makes sense I think).

Gall10 · 07/04/2025 11:33

Cattenberg · 07/04/2025 08:59

I’m the same.

Me too….if I ate 2000 a day I’d balloon!

JasmineAllen · 07/04/2025 11:32

Isn't 2k calories a day a limit rather than a target based on your height, build, activity etc?

JasonTindallsTan · 07/04/2025 11:30

I suspect a lot of people seriously underestimate just how many calories they are eating.

When I am being strict with myself I weight and measure every single thing that goes in my mouth. I’m 5ft 2 and overweight and moderately active (10,000 steps per day) - I can lose weight on 2000 cals per day. As I lose weight I expect that amount to go down but I also know it is very easy to eat more than that when I stop weighing and start eyeballing my portions and measuring my milk etc.

BreatheAndFocus · 07/04/2025 11:30

It refers to the average woman - some women will need more, some less. Surely that’s obvious? I eat around 2000 calories a day and I’m slim and fit. I’m also quite petite, so presumably I’d need more calories if I was taller and led the same lifestyle.

I wouldn’t look at celebs for diet advice! 😆 Most of them seem to swing between starving themselves and overindulging in junk food. What they say they eat is part of the image they promote not necessarily fact. I won’t name names but one female pop star said she skipped breakfast, ate a small salad of tomato and cucumber for lunch with no dressing and a pitiful evening meal that I can’t remember but was probably steamed chicken and no carbs. If that were true, she needs to see a doctor as something’s wrong with her metabolism.

I find it depressing that lots of women can’t eat a normal, healthy diet with a few treats without worrying or trying to pretend they only nibble at lettuce leaves. We need calories and sustenance too, just like men. This nibbling at lettuce crap only serves to promote guilt and encourage women to be undernourished and feeble.

Unitarily · 07/04/2025 11:25

I don’t count my calories but every time I have. Usually promoted by these threads. It can be quite a lot. You can easily eat or even drink them.

This sounds like a Donald trump speech 😂

But the background is my fav coffee is 345 calories and you would be amazed how many calories are in a spoldge of mayonnaise.

SociableAtWork · 07/04/2025 11:25

As others have said, it depends on age/height and activity levels, and where the calories are coming from - 2000 salad and protein will make you look better than 2000 from chocolate. I’ve done the research myself 😂

Running around with toddlers, and doing a huge amount of gym-based exercise, I definitely needed all 2000 calories.

Twenty years on, fairly sedentary and menopausal I can put on weight just looking at biscuits.

It’s all so confusing and has been for decades. Always a new diet that will see the weight melt off.

EnterFunnyNameHere · 07/04/2025 11:22

I just think it's mad that anyone at any point in time thought you could meaningfully apply one calorie expenditure to ALL women. I'm 6'1", my best friend is 5'3". Obviously we're not going to need the same calories per day. Same as any other measure (e.g., "waist size should be below Xinches to be healthy"). It just feels these generic measures have more people who do do not apply to, than those that they do!

Hellohelga · 07/04/2025 11:20

Podcastlover · 07/04/2025 09:10

Thanks that’s really interesting. Mine came up 1600 and that’s exactly what I would have thought.

Chypre · 07/04/2025 11:20

“The underlying science for calorie needs is much older, dating back to research in the early 20th century, with more refined models developing through the 1940s–1980s as nutrition science evolved.”
I think it’s safe to assume that majority of modern women (and men), who are largely sedentary (desk job, car) and not involved in physical labor as much as their 1950s counterparts, indeed don’t need 2000kcal “to sustain” themselves.

MuffinsOrCake · 07/04/2025 11:17

According to how I put 1 kg a day by adding just one slice of bread with my lunch gives me that 1 slice of bread actually has 1000 kalories.

AnticleaAndLaertes · 07/04/2025 11:17

SnoozingFox · 07/04/2025 09:00

Depends on the individual, obviously.

Although this thread is catnip to the people who love to use words like "guzzle" "scoff", "hoover up" or "no wonder there's an obesity crisis", while simultaneously telling us they are absolutely stuffed to bursting on a lettuce leaf and a cup of green tea,

A whole lettuce leaf - you glutton you!!

As with everything else, the calories per day should be calculated by using data such as Height, Sex, Activity levels etc - without this, its meaningless

MuffinsOrCake · 07/04/2025 11:16

MuffinsOrCake · 07/04/2025 11:14

I am my healthiest BMI when I eat only 400 a day. I eat now 1500 and am size 20

For me the issue is bread, cake, large portions of potato or rice. Once I get rid of the bread and snack on good protein, fruit, veg, eggs, fish, etc - I go down to size 10 within a month without any diet. I used to look at the bread calories label and think they actually lie because all I eat a day is one slice of bread and I grown with 1 kg a day ( this is my reality)

StrangerThings1 · 07/04/2025 11:16

Croissantsfordinner · 07/04/2025 08:57

I am barely losing weight eating 1600kcal a day and most of the people I know who are slim and fit definitely do not eat 2000kcal (I am referring to family, friends, colleagues, what I read here on MN and also celebrities diet, lol). So where does this guideline come from?
Unless you are almost an athlete, I don't think all those calories are actually needed, AIBU?

On average, women need about 1,600 to 2,400 calories each day, and men need 2,000 to 3,000 calories a day -- based on age and activity level. If you figure out that you need 2,000 calories per day, then you need to keep your calorie intake about equal with that number.

MuffinsOrCake · 07/04/2025 11:14

I am my healthiest BMI when I eat only 400 a day. I eat now 1500 and am size 20

lavenderlou · 07/04/2025 11:13

For women, things change with age. I used to eat at least 2000 calories, if not more, in my 20s and 30s to maintain my weight. I am quite tall and was always slim (size 8/10). Never done a lot of exercise. I don't need as many calories now in my late 40s. Maybe the guidelines need to take age into account.

Scottishskifun · 07/04/2025 11:13

ButtCheeks · 07/04/2025 10:31

I fail to understand how any adult can eat 1200 calories a day without losing their motherfucking MIND. Unless you’re super teeny tiny and short and don’t do anything physical—but still!

I’m 5’4, lift weights, walk loads and am very fit (abs, muscly, toned) and I start to feel like dogshit if I go below about 1700. Usually eat 2000-2500. 2000 calories is touted like it’s a crazy high number but it isn’t really if you’re active.

Honestly you get used to it, I also intermittent fast though so 1200 calories would be good size lunch a healthy dinner and a afternoon veg sticks with tzatiki for instance.

I'm aware of what I use to cook with so have very low calories from oils and I choose low calorie high protein sources which keep me full so quorn, prawns, chicken and fish.

I don't buy diet products and keep carb size to a palm but also do things like cook, cool, freeze and then reheat things like pasta and rice as it reduces the glycemic index so I don't get a spike. I have to have low carb for a health condition anyway and I'm at higher risk of type 2 diabetes due to gestational diabetes with DS2.

MesmerisingMuon · 07/04/2025 11:11

ProfessionalPirate · 07/04/2025 11:04

How tall are you? I’m 40 with a similar lifestyle, but my weight would skyrocket if I ate anything close to 2500kcal. I maintain at around 1500kcal. I’m 5’2” so yes I’m small, but that’s only 1-2 inches smaller than the average woman in the UK apparently. You wouldn’t think it would make so much difference.

I'm almost 5'11!! I'm about size 10/12.

I did eat more than 2500 but due to perimenopause I have cut back a bit as clearly my body doesn't need so much.

I'm also a teacher so spend most the day on my feet then in the hols I have my kids to run round with.

Doolallies · 07/04/2025 11:07

Sherry1978 · 07/04/2025 11:06

Are you under 40?

Yes early 30s

LaurieFairyCake · 07/04/2025 11:07

So my maintenance calories (to not LOSE or GAIN weight) are 1000 now. I’m very short and very small bones. As an idea my feet are a 3, my hands for gloves are a 6, my wrist is about 5 inches circumference. I weigh 8 stone 7 pounds and I’m still overweight on bmi.

I’m really, really small.

I’m losing weight on a weight loss drug and eat 800 calories a day to lose between half-one pound per week. It’s very, very slow.

I cannot wait to get to maintenance so I can eat a 1000 calories a day so I get some more energy from calories, 800 is tough energy wise (because of the weight loss drugs I’m not hungry so it’s not hard to eat this little).

but I’m tired, fall asleep at 9pm and just don’t have the energy I used to when I was able to eat more.

Sherry1978 · 07/04/2025 11:06

Doolallies · 07/04/2025 09:04

Hard disagree. I eat way over that amount and I’m a size 8 but running around after 2 pre schoolers. Also have fast metabolism. It’s different strokes for different folks

Are you under 40?

Booksandwine80 · 07/04/2025 11:06

I eat 2200 a day, I don’t weigh myself anymore but measurements all over are reducing. I weight train 4 times a week and never do less then 10,000 steps a day.

We are all so different.

ProfessionalPirate · 07/04/2025 11:04

MesmerisingMuon · 07/04/2025 09:02

The 2000 calories is based on an average sized female doing a sensible amount of exercise to stay a healthy size.

If you are shorter then clearly you need less. If you do more exercise then you need more etc...

I'm mid 40s, on my feet all day with work, kickboxing for 2 hours a week then go to the gym and always running round with my kids. I eat about 2500 calories a day to cover my activity level.

I love food so make sure I'm very active.

How tall are you? I’m 40 with a similar lifestyle, but my weight would skyrocket if I ate anything close to 2500kcal. I maintain at around 1500kcal. I’m 5’2” so yes I’m small, but that’s only 1-2 inches smaller than the average woman in the UK apparently. You wouldn’t think it would make so much difference.