Should you feed a cold and starve a fever?

The advice is literally centuries old: Feed a cold and starve a fever.

The adage comes from a 1574 dictionary by English writer John Withals, who wrote, “fasting is a great remedy of fever.” That is in keeping with the standard for treating patients at the time, when physicians would starve or bleed someone with a fever to “cool” the body. They also called for feeding a person with a cold to “warm” them. But does following the saying help sick people feel better sooner?

UVA Today talked to University of Virginia School of Nursing associate professor Beth Quatrara to see whether food (or a lack thereof) is a remedy for illness.

Busting the myth

Despite what concerned loved ones may have told you, there’s no evidence suggesting you should feed a cold and starve a fever.

“There are health care traditions that have been passed down from generation to generation, and some of them do work. There’s science that shows eating chicken noodle soup has benefits when you’re sick. But feeding a cold and starving a fever is definitely not backed,” Quatrara said.

Beth Quatrara kneeling to pose for a photo with a Black Labrador

Beth Quatrara kneels next to "Woody," a service dog in training. Quatrara is an associate professor in Âé¶ąĆĆ˝â°ć School of Nursing. (Photo by Matt Riley, University Communications)

It’s important to make sure you consume more fluids while you’re sick, and avoid alcoholic, caffeinated or sugary beverages until you are no longer under the weather.

“Starving is not good. You want to have a lot of fluids on board because – not to be gross – but your sinuses are clogged up, and you want to thin those secretions,” Quatrara said.

Some of the problem with the advice is that fevers and colds can occur at the same time. A cold typically implies a viral infection, Quatrara said, and fevers are one way the body fights infections of any kind. If you have a fever of over 100 degrees, you should seek medical attention. 

Can certain foods prevent you from getting sick?

Unfortunately, it’s not as simple as that. Quatrara said your best bet is to aim for a healthy, well-balanced diet. She recommends paying attention to how much protein you eat.

“We want our immune systems to get rid of the cold, get rid of the fever, and our immune system is based on proteins,” she said.

If you’re already under the weather, foods rich in antioxidants like vegetables, berries and greens have anti-inflammatory properties that may help you feel better. Honey can help soothe a sore throat and also has anti-inflammatory properties. Likewise for citrus and ginger – which is why it’s easy to find teas with some combination of lemon, ginger and honey. 

Often, a cold or a fever suppresses the sufferer’s appetite. 

“When you’re sick, your body uses a lot of energy trying to get well. That lack of energy, those aches and pains, it’s actually your immune system working to fight off infection. That means a lot less energy is going toward your digestion, so that’s why that slows down,” Quatrara said.

You should try to eat a little bit if you can, and “push yourself” on drinking fluids, Quatrara said.

Use supplements carefully

Despite the marketing, supplements probably don’t help treat a cold.

Vitamin supplements containing vitamin C purport to boost your immune system and help treat colds. There’s some evidence they can help support a healthy immune system, but less to back the notion they can shorten the duration of a cold. Quatrara said they’re fine to take, especially since people generally don’t get sick from taking too much vitamin C.

People should be more careful about zinc supplements, Quatrara said. The manufacturers of zinc supplements claim if you take them at the onset of a cold, they can help you feel better faster. 

“You can take too much zinc too quickly,” Quatrara said.

Some research suggests too much zinc can cause ringing in your ears and loss of your sense of smell and taste. It’s best to try to meet your nutritional needs through a varied diet.

The best defense against getting sick is advice you probably already know, Quatrara said: Rest up, eat a healthy diet, move your body, stay hydrated and take care of yourself.

Media Contacts

Alice Berry

University News Associate Office of University Communications