Although echinacea proved ineffective, the people who took it experienced no side effects of note, which suggests that the remedy is generally safe, says Michael Perskin, MD, an assistant professor of medicine at NYU Langone Medical Center, in New York City.

CNN: Echinacea fails to curb the common cold (again)

Kenneth Langone, who played a critical role in the founding of Home Depot, and former Walt Disney CEO Michael Eisner were among his many well-known clients.

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