Kgnu - How On Earth

Dogs have an incredible sense of smell - it's so good, people can train dogs to sniff our everything from illegal drugs and explosives to lost people and even computer “thumbnail” drives, that maybe someone is trying to sneak into a high security building so they can sneak out information.  So how about dogs sniffing for something life-saving, such as a dangerous drop in blood sugars for an insulin-injecting diabetic? For a healthy person, the amount of sugar in the entire bloodstream at anytime is roughly 1 teaspoon. One teaspoon of sugar in around 5 liters of blood. That's it.  For most people, the body's own insulin production keeps blood sugars in a relatively healthy range, with the pancreas adjusting insulin levels in miniscule amounts to keep blood sugars in balance. For a diabetic who injects insulin, the injection itself can end up putting too much or too little insulin into the body, and this is especially dangerous when it forces blood sugar levels to go far lower than they normally would.  Modern