Colds & Immunity
Most colds clear up on their own in a week to ten days, and the goal of a home remedy is to make that week more comfortable. Here you will find what the evidence says about honey for coughs, zinc lozenges, elderberry and salt-water gargles, including correct use, realistic expectations and important safety points such as never giving honey to babies under one year old.
Vitamin C for Colds: Does It Prevent or Shorten Them?
Taking vitamin C every day slightly shortens colds but does not stop most people catching them, and starting it once you are ill shows little benefit. Here is what the research says.
Saline Nasal Rinse for a Blocked Nose: How to Do It Safely
Rinsing your nose with salt water can ease congestion from colds, allergies and sinus problems. Here is what the research shows, how to rinse, and the water rule you must not skip.
Salt Water Gargle for Sore Throat: How to Do It and When It Helps
Gargling warm salt water is a cheap, simple way to ease a sore throat. Here's the right recipe, what the research says, and the signs that a sore throat needs a doctor.
Elderberry for Colds and Flu: Benefits and Safety
Elderberry syrup is a popular cold and flu remedy. A few small trials are encouraging, but evidence is limited, and raw berries, leaves and stems are toxic. Here's how to use it safely.
Zinc for Colds: What to Know Before Taking It
Zinc lozenges might shorten a cold slightly if started early, but the evidence is uncertain and too much zinc has real downsides. Here's how to use it, and what never to use.
Honey for Cough: What the Evidence Shows and How to Use It Safely
Honey is one of the few home cough remedies with decent evidence behind it. Here is how much to take, who should avoid it, and when a cough needs a doctor.