If you are nursing, your child will receive the echinacea you take through your breastmilk. Astragalus Astragalus is a tonic herb that boosts immune function and strengthens resistance to disease. It increases the activity of infection-fighting white blood cells and boosts the production of interferon, an antiviral agent. Astragalus is used to prevent colds and flu and to restore immune strength once an illness is over. It is safe for long-term use and can be taken consistently throughout the cold and flu season.
Astragalus is considered a warming herb in Chinese medicine suitable only for cold conditions.
Depending upon the symptoms, a cold or flu may be considered hot or cold. Otherwise don t use this herb during the illness. Sliced, dried astragalus root looks like a wooden tongue depressor. To make a tea, simmer 6 slices in 3 cups of water for 1 hour. Strain and serve.