I just read a newly released study from a University where researchers found that as little as 100mg of ginger effectively killed cancer cells. Ginger comes in mega doses as well and is sometimes combined with Turmeric which is another outstanding herb.
You can get ia 120 capsule bottle on Amazon for under 14 bucks and it contains:
Turmeric Curcumin Complex 1950mg; with 95% Standardized Curcuminoids and 300mg Ginger; and enhanced with 15mg BioPerine to provide maximum absorption and bio-availability
This is great for joint support as well!