There’s an actual advert on tumblr:

Colloidal gold will do the same thing that colloidal silver will do. It will turn your skin blue, and cause organ inflammation toxicity in your liver and kidneys and skin rashes.

“A new kind of "phase transition" in water was first proposed 30 years ago in a study by researchers from Boston University. Because the transition has been predicted to occur at supercooled conditions, however, confirming its existence has been a challenge. That's because at these low temperatures, water really does not want to be a liquid, instead it wants to rapidly become ice. Because of its hidden status, much is still unknown about this liquid-liquid phase transition, unlike the everyday examples of phase transitions in water between a solid or vapor phase and a liquid phase.”

“The team has used computer simulations to help explain what features distinguish the two liquids at the microscopic level. They found that the water molecules in the high-density liquid form arrangements that are considered to be "topologically complex," such as a trefoil knot (think of the molecules arranged in such a way that they resemble a pretzel) or a Hopf link (think of two links in a steel chain). The molecules in the high-density liquid are thus said to be entangled.

In contrast, the molecules in the low-density liquid mostly form simple rings, and hence the molecules in the low-density liquid are unentangled.

Andreas Neophytou, a Ph.D. student at the University of Birmingham with Dr. Dwaipayan Chakrabarti, is lead author on the paper. He says, "This insight has provided us with a completely fresh take on what is now a 30-year old research problem, and will hopefully be just the beginning."

A woman with bronze-colored skin, from Hebra’s Atlas of Skin Diseases, 1840s. Hebra’s Atlas was a pioneering work in dermatology. This woman had discolored her skin (and perhaps lost a tooth) because she ingested supplements that contained silver. 

Colloidal crystal. A computer simulation: “The connectivity of the crystals in the colloidal crystals above. Connections in white indicate that particle has six equally spaced neighbours and therefore forms part of a crystalline domain.”