• Echinacea

This pretty purple flower is the star of immunity . Its roots, long used in North America to treat wounds, prevent cold season ailments , "especially those affecting the upper respiratory tract," says Dr. Franck Gigon, Phytotherapist, author of "50 effective plants to treat you "(ed. of the Opportun). US researchers at the University of Connecticut have confirmed its effectiveness in preventing colds .

In practice. For optimal protection, take 2 tablets of dry extract of Echinacea per day (Naturactive Echinacea or Arkocaps Echinacea), five days a week for one month. Or in the form of complete suspension of fresh plants (SIPF). 10 ml per day diluted in water for 10 days.

  • The cypress

Antiviral, it contains tannins that decongest the mucous membranes and prevent the proliferation of microbes . As soon as the viruses circulate, it is used associated with echinacea to stimulate its immune defenses.

In practice. Opt for standardized plant extracts (EPS), the content of active ingredients is guaranteed. One teaspoonful 4 times a day, in cure of ten days a month. Or Cypress-Echinacea Phytostandard, 2 tablets a day, four days a week for a month.

  • seabuckthorn

Ideal partner from the first frost, it boosts tone, increases resistance to cold and accelerates the manufacture of antibodies due to its high concentration of flavonoids. Its concentration in vitamin C is also five times higher than that of kiwi!

In practice. To pass through the cracks of the flu , take it as extracts of organic buds, which concentrate all the vital energy of the future plant (Vitaflor Sea Buckthorn): 15 drops in the morning to swallow with a little bit of water.

  • Rosemary

Its flowering tops are a great help in times of fatigue . It contains vitalizing essential oils that boost immunity. "Its anti-infective power has been demonstrated on various bacterial strains," says Dr. Franck Gigon.

In practice. For a preventive use, the decoction is well adapted: pour 30 g of flowery tops in a liter of simmering water, let steep on the fire for 5 minutes, then 15 min off the heat. Filter before drinking. One cup before each meal, every day for a month.

  • astragalus

This plant of Chinese origin is a barrier to viruses by supporting the immune system through its high concentration of saponins and toning polysaccharides. Studies have shown that it increases the formation of antibodies in the nasal mucosa of people sensitive to colds. It also promotes the proper functioning of the adrenal glands, which avoids the installation of fatigue.

In practice. Make a cure of standardized extracts of astragalus roots for at least 3 weeks (Astragalus Vital Plus, 1 to 3 capsules a day). To associate with echinacea or cypress for an optimal efficiency.