Metamucil One, you’re go for take off. Remember, you will be carrying 40 tons of Metamucil, America’s number one fiber supplement. Since the creation of the National Aeronautics and Space Administration, astronauts have been forced to deal with eating food that does a real number on their digestive systems. The launch of Metamucil One marks a major step forward in the NASA astronaut diet. Thank you for your patriotism.