Probably effective in treating mild to moderate depression, and possibly effective when used for physical symptoms associated with mild depression or to treat anxiety. Creatine To increase exercise performance and muscle mass in athletes and older adults. Also used to treat heart failure. Possibly safe when used appropriately, but there is insufficient data on safety of long-term use. Can cause nausea and diarrhea.
Athletes report muscle cramping.
Possibly effective when used to enhance muscle performance during brief, high-intensity exercise. Likely ineffective when used for increasing endurance. Echinacea For treating or preventing colds and other upper respiratory infections. Also as an antiseptic, antiviral and immune stimulant, dilator of blood vessels and treatment for urinary infections. Likely safe when daily use is limited.