An artificial blood product developed by researchers at the Albert Einstein College of Medicine is showing great promise in ongoing clinical trials in Stockholm, Sweden - the first time that a blood substitute has ever been used successfully in humans. The Einstein researchers - whose work is supported by $2.2 million in grants from the National Institutes of Health and the U.S. Army -- are also fine-tuning a powder version of the substitute that can be reconstituted for use as needed with the simple addition of water.