¿Algún remedio natural para el resfriado funciona?

Whilst a resfriado común can leave you feeling under the weather, you can usually treat it at home without seeing a doctor.

Natural cold remedies

Dr Sara Kayat, GP, says that when it comes to natural cold remedies, there's lots of anecdotal advice out there about how to manage colds.

"Some remedies do have a medical basis to them, and others less so," she says.

So, what natural cold remedies do we tend to reach for, and is there any evidence that they work?

Echinacea

This herbal remedy has traditionally been the treatment of choice for treating colds over the winter months. It is believed that the herb boosts the immune system by increasing white blood cells which fight infections and reduces many of the symptoms of a cold. However, Kayay explains that the evidence is mixed as to whether it works.

For example, one review of 16 trials found that some showed that echinacea may reduce the length of time colds last and relieve symptoms - while others showed it did not work.¹ However, a more recent, smaller study looking at echinacea tablets in children found them to shorten the length of colds.²

Kayat adds: "More robust research is needed before the effects of echinacea on preventing or treating colds can be concluded."

Honey and lemon

Lemon and honey may work in a number of ways.

"Firstly, you are taking in fluids, which is important when you are ill," says Kayat. "Secondly, you are also getting vitamina C from the lemon. Several studies show that vitamin C can reduce the duration and severity of a common cold.

"Thirdly, the honey may offer a boost of energy and a soothing element for a dolor de garganta."

She adds that honey is also thought to have antibacterial properties, although this may not be helpful in a viral infection. If you heat the lemon and honey, the steam may also offer some help in reducing the congestion.

Jengibre

Ginger has been used for medicinal purposes for centuries and is thought to soothe many ailments due to its active compounds, which include gingerols and shogaols. Studies have shown that these compounds have anti-inflammatory and pain-relieving properties, which may help reduce symptoms, including a sore throat.

"Ginger does have some anti-inflammatory properties, which may help with the symptoms of the common cold," advises Kayat.

Garlic

In theory, garlic has antimicrobial and antiviral properties that may help the immune system fight viral infections and relieve the common cold. However, according to Kayat, the evidence for the use of garlic in managing a cold is limited.

Zinc

Zinc is an essential mineral which your body doesn't make on its own. There is some evidence to suggest that taking zinc within 24 hours of a cold starting will reduce its duration and severity.

Dr Riccardo Di Cuffa, GP, says that if you have a dieta equilibrada y saludable then additional zinc should not be required.

"Foods rich in zinc include nuts, seeds, eggs, dairy products such as cheese, meat, and whole grains," he says. "Too much zinc can be harmful so be careful with supplements as some people report unpleasant side-effects."

Menthol

Menthol, which is included in many over-the-counter-medicines, is the essential oil that comes from mint plants. Di Cuffa advises that there is limited medical evidence that menthol is effective at easing congestion. Some people do find it relieves blocked sinuses and congested airways making you more comfortable and able to breathe more freely.

He says: "It can be applied to your skin or pillow with a rub purchased from pharmacists or inhaled via a humidifier or hot water steam inhalation over a sink, by adding a few drops of essential oil.

"But don't apply essential oils directly to your skin as they can irritate and cause a reaction."

Vitamina D

There is evidence to suggest that vitamina D is useful for preventing a cold. Di Cuffa explains that your body gets vitamin D from certain foods - such as eggs, oily fish and red meat - and from skin exposure to sunlight. However, levels in most foods are low, and vitamin D formation in the skin doesn't happen in the UK between October and April, as the sun isn't strong enough.

Di Cuffa says: "The evidence is not conclusive, but vitamin D may help with a cold as a good immune system support. It’s generally agreed that most people should get enough vitamin D from their diets in the spring and summer months, but that you should take a supplement during the autumn and winter months in the UK."

Probióticos

Probióticos can have health benefits during periods of illness and can help keep your gut healthy.

Di Cuffa explains that your immune system is linked to your gut, so a healthy gut will generally mean a healthier immune system.

He explains: "Probiotics are live bacteria that can be found in yoghurt and other fermented foods - for example, pickle, kefir and some cheeses."

You can also buy a wide variety of probiotic supplements.

According to Kayat, the best way to manage a common cold is to let it run its course.

"If you need to rest, rest," she says. "But if you feel well enough to get up and go for a walk, there is evidence to suggest that light ejercicio may boost your immune system."

She recommends staying hydrated by drinking plenty of water. A balanced diet, and foods high in antioxidants such as vitamin C and omega 3, will also boost your immune system.