Colds, flu and supplements: what helps?

A cold and flu can feel different.

A cold commonly develops gradually with a runny or blocked nose, sneezing, a sore throat and a cough. Flu often starts suddenly and can bring marked tiredness, fever and body aches. Symptoms overlap with other infections, so appearance alone cannot identify the virus.

Rest, fluids and symptom care are useful starting points. A pharmacist can advise on suitable medicines. Check combination cold remedies so you do not accidentally take a medicine such as paracetamol twice. Pregnancy, existing conditions and other medicines change what is suitable.

A nutrition role is not a cold or flu cure.

No complementary approach has been established as a treatment for flu. Routine vitamin C does not reliably prevent colds in the general population, and taking it only after symptoms begin has not consistently helped. Correcting a deficiency is a separate nutritional question.

Some oral zinc lozenge studies suggest a shorter cold, but results vary by preparation and adverse effects include nausea and an unpleasant taste. That finding cannot be transferred to a zinc picolinate capsule. Avoid intranasal zinc products because of the risk of losing the sense of smell.

Immune-cell, antioxidant or laboratory findings for astragalus, mushrooms, garlic and other herbs do not prove fewer colds or faster flu recovery. Supplements do not replace eligible flu vaccination or time-sensitive medical assessment and treatment for people at higher risk.

Keep comfort measures simple.

A comfortably warm honey-and-lemon drink may soothe a sore throat. Never give honey to a child under one year, and allow hot drinks to cool. Avoid bowls of steam around children because of scalding risk.

The drink recipes linked below use culinary ingredients for flavour and hydration. Their quantities are not a clinical extract dose, and they make no antiviral or detox claim. Ginger can aggravate heartburn; mint may worsen reflux; chamomile can cause allergy.

Know when home care is not enough.

For flu symptoms, seek prompt NHS 111 or GP advice if you are pregnant or recently gave birth, are 65 or older, have a long-term condition or weakened immune system, are short of breath or very unwell, or are not improving after a week.

For a cold, seek advice if symptoms worsen, a high temperature persists beyond three days, symptoms have not improved after ten days or a cough lasts longer than three weeks. People with underlying conditions or reduced immunity should seek advice sooner.

Seek advice if you are worried about a baby or child, or have chest pain or new breathlessness, even when you think the illness is a cold. Use emergency services for the severe symptoms below.

Call 999 or attend A&E for sudden chest pain, severe breathing difficulty or coughing up blood. If you are uncertain or symptoms feel serious, use local urgent medical services rather than waiting for a supplement to help.

Compare the relevant claims.

Zinc picolinate · Vitamin D3 · Astragalus · Mushrooms & mushroom blends · Black garlic