Are You Not Eating Enough? Signs Most Women Miss

Are You Not Eating Enough? The Signs Most Women Miss

Written by Julie Salter. Last updated August 28, 2026.

If you have been eating less and less and the scale still will not move, the problem might not be that you need to cut more. It might be that you have been cutting for too long.

Under-eating does not look like starving. It usually looks like a woman doing everything right. Small breakfast, skipped lunch, sensible dinner, a walk most days, and no results to show for it. That is the pattern I see most often, and it is the one almost nobody names.

What "not eating enough" actually means

It does not mean you never eat. It means your intake has been below what your body needs for long enough that your body has started to respond.

Most women I work with did not get here by accident. They got here one reasonable decision at a time. You cut something and it worked. Progress slowed, so you cut something else. That worked for a while too. A year later you are eating far less than you used to, working out more than you used to, and getting less back than you ever have.

That is not a willpower problem. That is a body doing exactly what bodies do.

Why eating less can stop working

When you take in less energy than you use, your body does not just quietly burn fat and carry on. It adapts.

Researchers call this adaptive thermogenesis, and it is well documented. A study revisiting the classic Minnesota starvation research found that resting energy expenditure fell by more than expected during three weeks of severe restriction, and that the drop appeared within the first few days rather than after months. Reviews of energy expenditure during weight loss describe the same picture: reductions in resting energy use that are larger than body size alone would explain, alongside falls in leptin, thyroid hormone, and sympathetic nervous system activity.

Two things are worth being honest about here.

The first is that this response varies enormously between people. Some women see a small change. Others see a large one. Any article that gives you a single number for how much your metabolism has slowed is guessing.

The second is that your metabolism is not broken. Adaptation is not damage. It is a survival feature, and it responds to being fed.

The signs most women miss

Under-eating rarely announces itself. It leaks out sideways.

You are always cold. Especially your hands and feet, especially at rest.

Your workouts feel harder than they should. Same weights, same session, and you are wrecked by the end of it. Or you have stopped adding weight entirely.

You are exhausted but you sleep badly. Waking at three in the morning is a very common one.

Your hair, skin, and nails have changed. More shedding in the shower, nails that split.

Your mood is shorter than it used to be. Everything is irritating. Small decisions feel heavy.

You are moving less without noticing. You take the lift. You cancel plans. You fidget less. This one matters more than people realise, because it is a real reduction in daily energy use and it happens below the level of conscious choice.

Your period has changed or stopped. This one goes to your doctor, not to a coach.

Food is on your mind constantly. Planning it, avoiding it, thinking about the next meal from the moment you finish the last one.

You do not need all of these. If you recognise three or four, and you have been eating less for a long stretch, that is worth paying attention to.

Why this is more common in midlife

Two things stack up at once.

Body composition tends to shift with age, and muscle is the most metabolically active tissue you have. Losing it lowers what you need at rest. Long stretches of low intake plus not much strength training is one of the most reliable ways to lose it.

At the same time, women in their forties and fifties have usually been dieting on and off for twenty or thirty years. Each round starts from a slightly lower baseline than the last. By the time menopause arrives and the rules change again, intake has often drifted down without any single decision to lower it.

If that sounds familiar, it may be worth reading why weight loss gets harder in menopause next, because these two problems overlap constantly.

What to do first

Do not double your food tomorrow. That is a good way to feel terrible for a week and conclude that eating more does not work.

Here is where I would start.

Why protein comes first

If you only change one thing, change this one.

Protein does more work than any other macronutrient when energy is limited. Position stands from the International Society of Sports Nutrition report that higher protein intakes help preserve lean mass during a calorie deficit, and that slower rates of loss protect it better than aggressive ones. A separate review notes that professional bodies recommend keeping protein up specifically during dieting, for the same reason.

Practically, that means protein at every meal rather than one large hit at dinner. It also means eating enough of it on the days you train, not just the days you feel like being good.

Pair that with strength training two or three times a week. Eating more without training gives your body no reason to put those calories toward muscle. Eating more with training does.

When this belongs with someone other than a coach

I want to be clear about this part.

Coaching can help you rebuild intake, structure meals, add strength work, and stay consistent while your body adjusts. That is what I do and I am good at it.

Coaching cannot diagnose you. If your period has stopped or become irregular, if you are losing hair persistently, if you are extremely fatigued, or if bloodwork has come back abnormal, that is a conversation for your doctor first. Low intake is one possible explanation among several, and some of the others need testing.

And if thinking about food has started to feel like something you cannot put down, or eating has become a source of real distress, please talk to a qualified professional. That is not a coaching problem and I will always say so.

The part that takes the longest

The hardest thing about eating more is not the food. It is believing it will work when everything you have been taught says the opposite.

Most women I work with spend the first few weeks waiting for the disaster. It usually does not come. What comes instead is more energy, better sessions, a bit more patience with their families, and a body that finally has something to work with.

You cannot restrict your way out of a problem that restriction created.

Sources

• Müller MJ et al. Metabolic adaptation to caloric restriction and subsequent refeeding: the Minnesota Starvation Experiment revisited. American Journal of Clinical Nutrition, 2015.

• Müller MJ, Bosy-Westphal A. Changes in Energy Expenditure with Weight Gain and Weight Loss in Humans. Current Obesity Reports, 2016.

• Aragon AA et al. International Society of Sports Nutrition position stand: diets and body composition. Journal of the International Society of Sports Nutrition, 2017.

• Jäger R et al. International Society of Sports Nutrition position stand: protein and exercise. Journal of the International Society of Sports Nutrition, 2017.

This article is general education. It is not medical advice and it is not a diagnosis.