What to Eat When You Have Gastro
Safe Food Choices & Hydration Tips for Relief
When you have gastro, you should focus on eating bland, easy to digest foods and staying hydrated to help your body recover.
Most people find themselves facing a bout of gastroenteritis at some point, and while it is never a pleasant experience, it is usually something you can manage at home with the right approach.
The nausea, vomiting, and diarrhoea that come with it are your body's way of trying to get rid of an irritant, but they can leave you feeling drained and dehydrated.
Reassuringly, these symptoms are almost always temporary, and making smart choices about what you put in your stomach can help you feel like yourself again much faster.
What Is Gastro?
Gastroenteritis is essentially an inflammation of the lining of your stomach and intestines. Most Australians will pick up a viral version, like the norovirus, but it can also be caused by bacteria or even a bout of food poisoning from something dodgy you ate.
It usually doesn't stick around for long, with most cases clearing up within one to three days. During this window, your digestive tract isn't working at full capacity, which is why even the thought of a regular meal can make you feel a bit green.
What To Eat If You Have Gastro
When you are ready to start eating again, the key is to keep things incredibly simple. You want to choose foods that are low in fibre and fat because they are the easiest for your gut to handle without causing extra strain. Think of it as giving your digestive system a bit of a holiday while it repairs itself.
Best Foods to Eat
Bananas. These are soft, easy on the stomach, and help replace lost potassium.
White rice. This is low in fibre and helps to bind things together in the gut.
Applesauce. A gentle way to get some natural sugar and energy without any skin or seeds.
White toast or crackers. These provide simple carbohydrates that are easily digested.
Boiled potatoes. Make sure they are peeled, and skip the butter or milk for now.
Pasta. A small bowl of well-cooked pasta can be a good source of energy.
Clear Soups. These provide a bit of salt and hydration without being heavy.
White toast. This provides simple starches that can comfortably absorb excess stomach acids.
Bananas are often the first thing people reach for, and for good reason. They contain a type of fibre called pectin, which can actually help absorb excess liquid in your intestines. This might help firm things up a little.
When it comes to rice, stick to the white rather than brown or wholegrain. While we usually think of brown rice as the healthier option, the extra fibre in the husk can be a bit too much for an inflamed gut to manage.
Clear broths are another fantastic starting point. They give you a little bit of sodium, which is a key electrolyte your body needs to hold onto water. If you are feeling shaky from not eating, a plain cracker or a bit of dry white toast can give your blood sugar a tiny boost without upsetting the balance.
The goal is to take small amounts slowly to see how your body reacts.
The BRAT Diet Explained
You might have heard of the BRAT diet, which stands for Bananas, Rice, Applesauce, and Toast. This is a classic recommendation because these foods are very gentle on the stomach and unlikely to trigger another round of vomiting.
It is a helpful way to remember the basics of what to eat when you are at your worst.
However, while it is great for the first 24 hours of recovery, you should gradually expand your diet once you start feeling better.
What Should You Drink When You Have Gastro?
Keeping your fluid levels up is the single most important task when you are dealing with gastro. Your body loses massive amounts of water and essential minerals through vomiting and diarrhoea, making dehydration a real threat. Letting yourself dry out will make you feel infinitely worse, causing splitting headaches and deep muscle fatigue.
So, you’re probably wondering, “How much water should I drink?”
Guzzling down a huge mug of cold water can shock an empty stomach and cause it to reject the fluid immediately. The most effective method is to take tiny, frequent sips every few minutes rather than big gulps. Leaving a glass of water within arm's reach means you can sip continuously throughout the day without moving around too much.
Plain water is an excellent start, but it cannot replace the complex salts your body has lost during the illness. Drinking only water when you have severe diarrhoea can occasionally dilute your system too much. Mixing up your fluids helps keep your electrolytes in a safe, healthy balance while you recover:
Water: Take small, regular sips to keep your baseline hydration.
Oral rehydration solutions: These commercial formulations provide the exact balance of salts and glucose your body needs.
Diluted sports drinks: These can help in a pinch, but they are often too sugary and need to be diluted with equal parts water.
Clear broths: Warm chicken or vegetable broth provides fluids and a helpful hit of sodium.
Peppermint tea: A weak, warm tea can naturally soothe a twitchy stomach and provide instant comfort.
Foods to Avoid When You Have Gastro
Avoiding irritating foods can dramatically shorten your recovery time and save you from unnecessary pain. Some ingredients act like sandpaper on an already inflamed gut, causing immediate spasms and watery stools.
Giving these problematic items a wide berth for a few days gives your tissues a proper chance to knit back together.
Avoid these foods until you are completely back to your normal self:
Dairy products: Milk, cheese, cream, and butter can be very difficult to digest due to a temporary loss of the lactase enzyme.
Fatty or fried foods: Greasy takeaways, chips, and heavy oils can cause your bowels to cramp up instantly.
Spicy dishes: Chillies, curries, and heavy garlic can irritate the delicate lining of your stomach.
Alcohol: This dries out your system further and places extra stress on an already exhausted body.
Caffeine: Coffee, energy drinks, and strong black teas stimulate your bowels, which can make diarrhoea much worse.
Sugary soft drinks: High-sugar juices and sodas draw excess water straight into your gut, loosening your stools.
When to Start Eating Normally Again
The best way to get back to your routine is to reintroduce foods as your hunger returns gradually. You don't need to force yourself to eat if you aren't hungry, but you also don't need to starve yourself.
Listen to your body as you go along. If you try a piece of toast and your stomach starts to cramp, take a break and go back to just liquids for an hour or two. Most people find they can start eating lean proteins like steamed chicken or white fish within a day or two of the symptoms stopping.
When to See a Doctor
While most Australians will recover from gastro at home without any drama, there are times when you need medical help. Dehydration can happen quite quickly, particularly in young children and older people. You should look out for signs of dehydration, such as a very dry mouth, dark yellow urine, or feeling dizzy when you stand up.
You should consider seeing a doctor if:
You can't keep any fluids down for more than 12 hours.
You notice any blood in your stool or vomit.
You have a high fever that won't go away.
You are experiencing severe or constant pain in your abdomen.
Your symptoms haven't started to recover after two days.
You can also call a nurse on-call service in your state if you aren't sure whether you need to head into the clinic.
Getting over a bout of gastro is really about being kind to your body and giving it the time it needs to settle down. Stick to bland foods, hydrate well, and ease back into normal eating once the worst of it has passed.
By focusing on simple options like white rice and bananas and prioritising hydration, you give your digestive system the best chance to bounce back. It might feel like a long few days, but by listening to your body and taking things slow, you will be back to your usual self before you know it.
FAQs
Can you eat eggs when you have gastro?
Yes. Eggs can usually be introduced as symptoms improve, but bland foods such as toast, rice, and bananas are often better tolerated at first.
Is yoghurt good for gastro?
Dairy foods are usually best avoided in the early stages because they can sometimes worsen diarrhoea. Yoghurt may be tolerated later as symptoms settle.
How long should you eat bland foods?
Most people only need bland foods for 24 to 48 hours. As symptoms improve, gradually reintroducing a wider range of foods can help restore normal eating patterns.
The information provided is general in nature and does not replace professional medical advice.
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