Following the idea of Tso Hung, by the hand of alchemy, the Middle Ages was the golden age of gold in medical treatments. The Persians Al-Razi and Avizena, the English Gilbertus Anglicus and Geoffrey Chaucer, the French Bernard Gordon... all prescribed gold to the patients, the richest ones, to cure their diseases.

The African Constantine wrote in the 11th century: “Gold has the property of curing defective stomachs, soothing the miedosos and alleviating heart diseases. It is confirmed that it is also effective against melancholy and baldness.”

It was also ideal for closing wounds, as Serapion Gaztea collected it in the 12th or 13th centuries: “When the wound is authenticated with gold, it does not produce blisters and heals faster and better.” They also used it to try to cure eye diseases, leprosy plagues and all sorts of things. There were also supporters of Cleopatra, who believed that gold helped maintain youth.

In the early Modern Age, gold was still a valued drug and gold pills began to be produced. But in the 18th century, skepticism about the medicinal properties of gold became widespread. In addition, they began to become aware of the side effects, gold does not dissolve easily and is difficult to absorb for the human body. It can be toxic and cause damage to the liver and kidneys.

Gold nanoparticles dissolved in a liquid are called colloidal gold. As it is easier to absorb, at the end of the 19th century colloidal gold gave fresh impetus to the precious metal as a medicine. At this time, it was mainly used to treat alcoholism and obesity. Today, attempts have been made to treat asthma, syphilis, cancer or tuberculosis with colloidal gold, but chrysotherapy, as it is called the therapeutic use of gold, is mainly used to relieve arthritis, albeit in a very limited way. In addition, it is used in cosmetic products, demonstrating that after two millennia Kleopatra is still influencer.