
Sweet foods during a cold, eating with a poor appetite and why diabetes and dehydration call for a different approach.
This material is for informational and educational purposes only and is not medical, psychological, or psychotherapeutic advice. If you are experiencing an acute psychological condition or need professional support, please contact a doctor, psychologist, psychotherapist, or crisis service.
When your throat hurts and you have no appetite, even ordinary food can feel like another chore. Advice to “cut out all sugar because it feeds the virus” adds another worry. You have already eaten a yoghurt or had tea with honey and begin to think you are hindering your own recovery.
For most people, a cold does not require giving up sweet foods completely. Being able to drink, eat and rest matters much more. Diabetes requires an individual sick-day plan; difficulty breathing, inability to drink or a noticeably worsening condition calls for medical help.

When you feel unwell, accessible food, fluids and a chance to rest matter. Artistic illustration created with AI.
What is wrong with “sugar feeds the virus”?
Viruses reproduce inside cells and use their resources. It does not follow that avoiding dessert will starve a virus or cure an infection. The body maintains blood glucose even when someone eats no sweets. Carbohydrates are also found in grains, bread, potatoes and many other foods.
Keep separate questions separate: what happens inside a cell, how glucose is managed in diabetes and whether you can eat a biscuit with a runny nose. An explanation of one mechanism does not, by itself, provide a ready-made recommendation for everyday meals.
Why stories about “switching off immunity” exaggerate
The popular claim that one serving of something sweet stops the body’s defences for several hours sounds far more certain than clinical practice warrants. The immune response does not work like a single switch. Measuring one cellular function in a study does not mean everyone will remain ill longer after dessert.
NHS advice for the common cold discusses rest, adequate fluids and food. It does not recommend eliminating sugar as a treatment. Nor is there reason to assume a strict diet can replace necessary treatment. NHS advice on the common cold.
What to eat when your appetite drops
Choose foods you can tolerate: warm soup, porridge, potatoes, an egg, yoghurt or soft fruit. You do not have to assemble an ideal lunch immediately. Sometimes smaller portions are easier, with a return to your usual meals once you feel better.
For example, you might manage porridge with banana in the morning, bean or chicken soup at lunchtime, and an omelette with bread in the evening. These are examples of accessible food, not a therapeutic diet. If a different set of dishes works for you now, there is no need to force yourself to follow the list.

Homemade chicken soup with potatoes, carrots and herbs. Image created with AI.
What about tea with honey, juice and ice cream?
A warm drink that is not scalding may feel more comfortable on your throat. Honey remains a source of sugar when added to tea during an illness; it does not become antiviral medicine. Do not give honey to babies under one because of the risk of botulism, or hot drinks to young children.
Acidic juice can irritate your throat, and you may simply dislike a sweet drink. Water suits some people better; others prefer unsweetened tea. Ice cream need not be automatically banned just because it is cold: consider your comfort and tolerance. However, avoid making sweet drinks and desserts your entire diet when other food is available.
Why diabetes needs a separate plan
During an infection, glucose can rise as the body responds to illness, even if someone eats less. Insulin, other medicines, the risk of dehydration and difficulty eating normally change the situation. This makes the universal advice to “just avoid sugar” particularly unhelpful.
A plan agreed with your clinician in advance sets out glucose monitoring, what to do about medicines and when to seek help. Do not change treatment yourself based on an article. CDC advice on managing sick days with diabetes.
What if the infection involves vomiting or diarrhoea?
This is a different situation from a mild cold. Substantial fluid loss may require pharmacy oral rehydration solutions prepared exactly as directed. The glucose in such a product does not turn it into a harmful “sugary drink”: it has a specific purpose. Cola, juice or a homemade mixture is not automatically an equivalent substitute. NHS advice on dehydration and rehydration.
Young children and people unable to keep fluids down need particular attention. Do not wait for a diet to solve dehydration.
What to keep after recovery
If sweet drinks have become your main everyday fluids, returning to your usual routine is a chance to reconsider that habit gradually. You do not need to blame sugar for every cold. One cup of tea during an illness and regularly consuming excess free sugars are separate issues. The latter is covered further in the article about sugar amounts and labels.
Preparing for a day without energy
Think about what you can usually manage to eat when you feel ill. Keep a few simple foods at home and note whom you could ask for shopping or a prepared lunch. A specific arrangement can help: “If cooking is difficult tomorrow, could you bring some soup?” It reduces household decisions on a day when you only want to lie down. If you have diabetes, also keep your agreed sick-day plan accessible.
Noticing your needs while resting
In the MriyaRun “Conversation with Yourself” body journal, you can write about what makes it hard to let yourself rest: unfinished tasks, guilt towards colleagues or reluctance to ask for help. Choose one need and one manageable action for today. The journal is for self-reflection here; symptom assessment and medical decisions belong with qualified professionals.
- MriyaRun: Journals, MAC Cards and Self-Reflection
- Nutrition
- Do you need to give up sweet foods when you have a cold?

