Hmm...Are you stumped? What could that be? To check if your guess is right,
It's Psyllium Husk Powder. Ever heard of it? It's an excellent source of fiber that has the ability to bulk over 100 times its original density. You know what that means? It's used as a laxative to get things going if you're constipated. Some people take it everyday to keep them regular.
You can buy the plain powder (some come in flavors), and all you do is stir 1 tsp into 8 oz of liquid. You can use water, juice, soy milk, rice milk or regular milk, but make sure to stir it well and drink it immediately (before it starts to bulk up). It's a good idea to drink additional water to help pass things along.
Psyllium Husk powder can also be found in fiber supplements. That's what Metamucil Powder is - psyllium husk with sucrose, artificial flavors, and yellow No.6 added to it. You may prefer to take the capsules instead, since drinking the powder can be kind of gritty.
Some people may experience bloating, abdominal pains and gas when taking psyllium husk powder. So you can start off taking small doses, and then can gradually increase to the recommended dosage as your body gets used to it.
Fit's Tips: Getting regular exercise and eating a diet rich in fruits and veggies, whole grains and lots of water should keep you regular without the use of fiber supplements like this one. If it's not cutting it, and you still need some "outside intervention," this may be just the thing you need.