 There seems to be some type of correlation, which they're actively still studying right now, that shows that if you have a low vitamin D level, there's something about having low vitamin D that allows fibroid tissue to proliferate. In other words, being deficient in vitamin D can make the fibroid grow. The same correlation is being found with green tea as well. So some of the alternative options patients seek out include supplementing with high doses of vitamin D and green tea extract.