Citicoline is a natural chemical in the body. It seems to play a role in brain health. It's available as a supplement in the U.S. In other parts of the world, citicoline is sold as a drug. It's used to try and help sharpen thinking in people with blood flow problems in the brain.
There isn't a clear optimal dose of feverfew for any condition. Quality and active ingredients in supplements may vary widely from maker to maker. This makes it hard to set a standard dose.
Can you get feverfew naturally from foods?
Some people eat the feverfew leaves, but they are bitter and may hurt your mouth.
What are the risks of taking feverfew?
Side effects. People have not reported serious side effects of feverfew. Researchers have used it safely with people in studies lasting up to four months. No one knows whether it is safe if you use it longer than that.
Side effects may include symptoms affecting the mouth, such as:
Loss of taste
Swollen, irritated lips and tongue
These side effects may be more common if you chew on feverfew leaves.