Place the feverfew flowers and leaves into the glass jar.
Fill the rest of the jar with the vodka or the glycerin and water. Make sure that everything is covered as you don't want mould to grow.
Add a piece of baking paper in between the lid and the jar as you put the lid on.
Label the jar.
Set the jar in a cool, dark place for 6 to 8 weeks, shaking every day.
When the time is up, strain through a piece of cheesecloth.
Pour your tincture into a clean jar and enjoy.
Nutritional information is an estimate and provided as a courtesy. The values may vary according to the ingredients and tools that are used. Please use your preferred nutritional calculator for more detailed information.