Are you eating enough to support your body?
When people come to see me with concerns like low energy, hormonal symptoms, digestive issues or fertility challenges, one of the first things I look at is what they're actually eating day to day.
For many of us, the nutrition messages we've heard over the years have focused on eating less: watching our portions, cutting calories, avoiding certain foods and trying not to overdo it.
For some people, those messages may be appropriate. But in truth, I often see the opposite.
Nutrition can feel incredibly complicated, and the internet is full of advice about what we should and shouldn't be eating. It's easy to wonder whether there's one food you should avoid, one nutrient you're missing, or one supplement that might be the answer. But more often than you might think, the biggest opportunities lie in getting the foundations right.
Sometimes, the missing piece is surprisingly simple.
They're simply not eating enough to support their body and lifestyle — something often referred to as under-fuelling (when your body isn't consistently getting enough energy and nutrients to support your daily life, activity levels and overall health).
A nutritious meal should leave you feeling nourished—not just full for 30 minutes.
What does under-fuelling actually look like?
When we think of under-eating, we often picture someone surviving on salads and black coffee. But it can be much more subtle than that.
Let's imagine Sarah.
Sarah has a busy job. She tries to eat healthily, cooks most evenings and rarely orders takeaways. She's certainly not trying to starve herself. In fact, she often feels like she's eating all day.
A typical day might look something like this:
Breakfast
A snack
Another snack
Lunch
Something sweet to keep her going in the afternoon
Dinner
More snacks in the evening
On paper, Sarah is eating regularly. But, when we look more closely, her meals are often quite light and don't contain enough protein, carbohydrate or healthy fats to keep her feeling properly fuelled. As a result, she's hungry again by mid-morning, reaches for snacks throughout the day and finds herself craving something sweet by the evening.
The healthy eating trap
Here’s what Sarah's meals look like:
Breakfast is fruit and yoghurt.
Lunch is a large salad.
Dinner is fish and vegetables.
She snacks on nuts or rice cakes.
There's nothing inherently wrong with any of these foods. They're all good choices. The problem is that, when put together, they may not give Sarah enough energy to meet the demands of her day.
Her meals might be missing some of the things that help us feel genuinely nourished and satisfied: enough protein, enough carbohydrate, enough healthy fats and enough overall energy.
The problem isn't the salad. The problem is when the salad is the whole meal.
A salad can absolutely be part of a healthy meal. The key is making sure it also provides enough protein, healthy fats, carbohydrate and overall energy to keep you fuelled.
When symptoms start limiting food choices
Another common pattern I see is people gradually removing more and more foods from their diet.
Perhaps someone has IBS and finds certain foods trigger symptoms. Or they're experiencing bloating and start avoiding foods they've heard might be inflammatory. Or they're worried about reflux, hormones or digestion.
It's important to say that, in some situations, more structured approaches such as elimination diets can be incredibly helpful and are well supported by the evidence for certain conditions. The key is that they're used for the right reasons and, ideally, with appropriate guidance.
What I often see, however, is people gradually cutting out more and more foods without a clear plan. Over time, the list of foods they feel comfortable eating grows smaller, usually driven by a genuine desire to feel better. Unfortunately, this can leave people eating a much more limited diet than they realise, making it harder to meet their energy and nutrient needs.
Signs you may not be eating enough
The challenge is that under-fuelling doesn't always show up as hunger.
Sometimes it looks more like:
Fatigue
Energy crashes
Brain fog
Poor concentration
Cravings
Feeling cold
Poor recovery from exercise
Feeling preoccupied with food
Feeling hungry shortly after meals
Of course, these symptoms can have many causes. But it's worth considering whether your body is getting the fuel it needs before assuming something more complicated is going on.
Why does under-fuelling matter?
When we don't consistently eat enough, our bodies have to prioritise where they use their energy. That doesn't necessarily mean something dramatic happens overnight, but over time it can affect everything from concentration and exercise recovery to hormone production, mood and how energised we feel. That's one reason why making sure you're eating enough is such an important foundation for good health.
What should you focus on instead?
Rather than worrying about the next supplement, detox or food rule, it can help to come back to the basics.
Ask yourself:
Am I eating regular, balanced meals?
Am I including a source of protein with most meals?
Am I eating enough carbohydrate to support my lifestyle and activity levels?
Am I including healthy fats?
Do my meals keep me feeling satisfied for 3–4 hours, or am I constantly reaching for snacks?
Am I often feeling hungry, tired or craving sugary foods between meals?
If you're genuinely unsure whether you're eating enough, it can be helpful to use a food diary app for a few days. There are several apps available, and one I often suggest is MyFitnessPal.
It’s important to note that I don't recommend this as a long-term habit, and this isn't about hitting the exact calorie target or becoming obsessive about tracking. Instead, think of it as a way of gathering information.
Tracking your intake for just a few days can help you understand:
roughly how much you're eating
whether you're getting enough protein
whether you're eating enough overall to support your body and lifestyle
whether there are any obvious gaps in your diet
For many people, it's reassuring to discover they're closer to meeting their needs than they thought. For others, it can highlight that meals are much lighter than they realised, giving them a clear place to start.
If you do decide to track your intake, remember that the goal is simply to build a better understanding of your current habits so you can make informed, sustainable changes.
Final thoughts
If there's one thing I'd like you to take away from this article, it's this:
Healthy eating isn't just about what you eat. It's also about whether your diet is giving your body what it needs to support your health, lifestyle and goals.
For some people, that might mean improving the quality of their diet. For others, it might mean eating more regularly, building more balanced meals or simply making sure they're eating enough.
Before worrying about the next nutrition trend or cutting out another food group, take a step back and look at the bigger picture.
Are your meals keeping you satisfied? Do you have enough energy to get through your day? Is your diet supporting the life you want to live?
If the answer is no, the solution may not be to cut out another food. It might simply be making sure you're giving your body enough of what it needs.
Sometimes, the biggest opportunity isn't changing what you're eating—it's making sure your body has enough fuel to support the life you want to live.
