Empty capsules allow you to fill your own powders at desired potencies, and avoid tablet binders and fillers. Buying powdered vitamins and filling your own capsules can save up to 50% off most retail prices. NOW Foods Gelatin Caps "0", depending on the powder, can hold between 400 - 600 mg.
Bovine Gelatin and Water
For best success in filling empty capsules, try using the Cap 'm Quik capsule filler.