100 pix MediGOLD 500 PMediGOLD is a true colloidal Gold and is a premium colloidal Gold dietary mineral supplement, containing 99.99+% pure Gold nanoparticles – colloidally suspended in pure pharmaceutical grade water. The Gold nanoparticles in MediGOLD are so small they are not only absorbed into the blood stream after digestion, but they are small enough to later pass across the blood-brain barrier and be utilized by the pineal and pituitary glands in the brain. colloidally suspended in pure pharmaceutical grade water. The Gold nanoparticles in MediGOLD are so small they are not only absorbed into the blood stream after digestion, but they are small enough to later pass across the blood-brain barrier and be utilized by the pineal and pituitary glands in the brain. but they are small enough to later pass across the blood-brain barrier and be utilized by the pineal and pituitary glands in the brain.