Blog / 20.10.2026

An immunity course before winter: what actually works?

Short answer: The foundations of immunity are the flu vaccine, regular sleep, a balanced diet, physical activity and not smoking. Deficiencies such as low vitamin D are identified with blood tests and corrected. Courses such as IV vitamins, glutathione and ozone can be added on top of this foundation as supportive measures in suitable people.

As the weather turns colder, flu, colds and other respiratory infections become more common. Many people think of IV drips when they hear “immunity course”, but the foundations of immunity are daily habits and preventive measures. Treatments such as IV drips and ozone can be added on top of this foundation as supportive measures in suitable people.

1. The foundation: preventive measures

  • Flu vaccine: recommended every year for risk groups such as people over 65, those with chronic conditions (diabetes, heart, lung or kidney disease), pregnant women and healthcare workers. Vaccination is recommended in autumn, ideally by the end of October; a vaccine given later can still provide protection.
  • Hand hygiene: washing hands often with soap and water reduces the spread of infection.
  • Crowded and indoor spaces: avoiding close contact with people who are ill and ventilating rooms are important.
A balanced plate with vegetables, pulses and fish (illustrative image)

2. Daily habits

  • Sleep: 7–9 hours of regular sleep a night is needed for the immune system to work well in adults.
  • Nutrition: a balanced diet with vegetables, fruit, pulses, whole grains and enough protein is the natural source of vitamin C, zinc and other micronutrients.
  • Activity: at least 150 minutes of moderate-intensity exercise a week is recommended.
  • Smoking and alcohol: smoking weakens the defences of the airways; stopping is one of the most effective steps you can take for your immunity.
  • Managing stress: prolonged, intense stress can have a negative effect on immunity.

3. Correcting deficiencies: vitamin D and others

Vitamin D levels can fall in the winter months as sunlight decreases. Levels of vitamin D, B12, iron and zinc are measured with a blood test; if a deficiency is found, the doctor plans suitable supplementation. High-dose supplements are not recommended without a deficiency.

4. Supportive courses under medical supervision

Alongside the basic measures, the following treatments can be planned as supportive measures in people for whom they are considered suitable. The effects of these treatments are still being researched and vary from person to person:

TreatmentHow it is givenChecked beforehandDetailed article
IV vitamin CIntravenous dripG6PD, kidney function, diabetesIV vitamin C
Glutathione dripIntravenous dripAllergy, asthma, pregnancyGlutathione drip
Ozone therapyMajor autohaemotherapy and other methodsG6PD, pregnancy, thyroid, bleeding disordersOzone therapy
Vitamin and mineral dripsIntravenous dripIdentified deficiencies and chronic conditionsPlanned at consultation

The content of the course and the number and spacing of sessions are decided individually, based on the examination, your medical history and test results. The same course is not given to everyone.

When should you see a doctor?

If you have a high fever, shortness of breath, chest pain, a fever lasting more than 3 days or a marked decline in your general condition, see a doctor without delay rather than having a course. Supportive courses are not a treatment for an active infection.

To create a plan that suits you for the winter, you can book an appointment at our practice at Metropol İstanbul B Block, Floor 18, Ataşehir on +90 506 520 30 55. For more details see our ozone treatments page.

Frequently asked questions

When should an immunity course be done?

Planning it before winter starts, in October–November, may be preferred; the timing is decided individually.

Does an immunity course replace the flu vaccine?

No. If you are in a risk group, the flu vaccine is recommended in addition.

Are blood tests needed before the course?

Yes; tests such as vitamin D, G6PD and kidney function help with planning.

How much does an immunity course cost?

The fee is determined after consultation, according to the content of the course and the number of sessions.

General patient information. Individual treatment is planned in consultation. Results vary from person to person.

Ask me

Get in touch with your questions about An immunity course before winter or to request an appointment.

💬 Ask me on WhatsApp — +90 506 520 30 55

✉️ Ask me by email — info@drsalimbalin.com

📍 We are at Metropol İstanbul Mall, in the best location in Ataşehir, Istanbul.

Metropol İstanbul Block B, Floor 18 · Ataşehir/Istanbul · Directions ↗

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