Mixed evidence over Echinacea being useful treatment for colds

A new study has found that for people seeking a natural treatment for the common cold, some preparations containing the plant Echinacea work better than nothing, yet "evidence is weak".

Echinacea `can help prevent colds`

The largest ever-clinical study of Echinacea has found that the herbal medicine can prevent colds, particularly in people who are especially prone to them.