Ordinary iodine tincture is well known to each of us as an effective antiseptic for treating wounds. But what is the so-called blue iodine? This non-toxic, broad-spectrum drug, discovered in the early 19th century, can be used to treat many diseases when taken orally. Blue iodine is used to treat dysentery and stomatitis, stomach ulcers, colitis and enterocolitis, conjunctivitis, tonsillitis, various types of poisoning and burns. With the help of blue iodine, the elasticity of blood vessels improves, which makes it possible to recommend it for the treatment and prevention of stroke. The famous herbalist Nina Bashkirtseva talks in detail about the history of the use of blue iodine, its composition and properties, and the effectiveness of the recipes given in the book is eloquently evidenced by healing stories, based on letters from readers.