Can long intake of glutathione iv affect cbc? can it cause blood cancer or leukemia ?

In a good way; no: Glutathione is unlikely to have any affect on the red cell count but may improve one's white cell count if it is abnormal as it supports immune function. As a substance that boosts immunity and supports detoxification it is likely to reduce risk of all cancers; there is no evidence that glutathione can cause any type of cancer. See http://tinyurl.com/y95rale