But the ratio of FEP/Hb is low in the PID and high in later(NID),if we give food enriched with iron to growing rats with PID, it would pay for the damage to them.

Choose the rats whose Hb is less than 100 g/L,divide them into 4 groups,ten rats in one group,give the control group iron deficiency feedstuff only and give the other three groups different concentrations of HI capsule for 30 days,Compare the change of Hb,Body weight and FEP of four groups at last.

The negatively charged porphyrins are more membrane permeable than cation porphyrins,so the transcription from DNA to RNA and telomerase inhibition of the anionic porphyrins compounds 1,2,and 3 are investigated with gel electrophoretic experiment and telomerase repeat amplification protocol assay(TRAP).