Correlation between intracellular triterpenes from mycelia in different growth stage of Ganoderma lucidum and inhibition effect on tumor cells was investigated.The results show that intracellular triterpenes are produced mainly in the later period of fermentation. Intracellular triterpenes from mycelia growing in growth stage vary in types, quantity, and relative proportion. It was found that the increase in the height of two peaks was negatively correlated to tumor cell inhibition rates, whereas the increa...