Feverfew The most effective natural supplement used to treat migraines is the herb feverfew. feverfew has been clinically proven in many studies to reduce the frequency and severity of migraines in about 75% or people who use it. Most people who take feverfew get fewer migraines, and when they do get them, they are much less severe. Visit - https://www.nationalnutrition.ca/articles/supplements/feverfew/