Pueraria mirifica

Pueraria mirifica, also known as กวาวเครือ Kwao Krua (among other names), is a plant found in northern and north eastern Thailand and Myanmar. In Thailand, the plant is known as “Kwao Krua Kao”, the 'Kao' meaning white which distinguishes Pueraria mirifica from other plants with tuberous roots also sharing the 'Kwao Krua' designation such as Butea superba, commonly called Kwao Krua Deng (Red) and the 'black' and 'dull grey' Kwao Krua plants. The species was definitively identified as Pueraria mirifica in 1952. Dried and powdered, the tuberous root of Pueraria mirifica has a history of domestic consumption in Thailand in traditional folk medicine as a rejuvenating herb to promote youthfulness in both women and men and is used widely within the now government-regulated practice of traditional Thai medicine. Evidence of the use of Pueraria mirifica can be definitively identified as early as the 13th Century AD. The ancient capital of Burma, known then as Pookham but now called Bagan, was one of the most important centers of knowledge in the Asian region until being sacked and partially destroyed by Kublai Khan's Mongol invasion of the late 13th Century. In 1931 a text was discovered secreted within the walls of a Buddhist temple that predated the Mongol invasion. Originally written on palm leaves, and translated into English and published in 1931, the document includes the instructions: Modern knowledge of Pueraria mirifica can be traced to the publication of the booklet containing the reference to the plant's use in ancient times, with the author Luang Anusan Suntara claiming in his publication use of the ingredient reduced wrinkles, got rid of gray hair, improved eyesight and memory, along with other benefits. Two decades later in 1952 Pueraria mirifica was formally defined with its botanical nomenclature under the sponsorship of Dr. Kerr, the then Director of the Botanical Section of the Journal of the Siam Society. The plant's name is derived from the Latin puer 'boy', 'child' and mirificus 'wonderful', 'miraculous'. Some herbal supplements claim various health benefits of the extracts of Pueraria mirifica including increasing bust size, skin, nail and hair health, reducing acne, balancing hormones and other rejuvenating effects. There is no scientific evidence to support any of these claims.