Echinacea: Usefulness and Safety – National Center for Complementary and Integrative Health

Write a detailed and engaging article about Echinacea: Usefulness and Safety  National Center for Complementary and Integrative Health. The article should be structured with clear distinct paragraphs, each focusing on a specific aspect of the topic. Keep the tone human and conversational while ensuring the content is informative, well-organized, and easy to read. avoid adding a conclusion; focus purely on delivering structured, insightful information.