Thanaka (Burmese: သနပ်ခါး; MLCTS: sa. nap hka:; pronounced: [θənəkʰá], also spelt thanakha) is a yellowish-white cosmetic paste made from ground bark. It is a distinctive feature of Myanmar (formerly Burma) seen commonly applied to the face and sometimes the arms of women and girls and to a lesser extent men and boys. The use of thanaka has also spread to neighboring countries including Thailand.
The earliest literary reference to thanaka is in a 14th-century poem written by Mon-speaking King Razadarit's consort. Mentions of thanaka also exist in the 15th century literary works of Burmese monk-poet Shin Maharatthasara (1486-1529).
Source and preparation
The wood of several trees may be used to produce thanaka cream; these trees grow abundantly in central Myanmar. They include principally Murraya spp. (thanaka)  but also Limonia acidissima (theethee or wood apple). The two most popular are Shwebo thanaka from Sagaing Division and Shinmadaung thanaka from Magwe Division. A more recent contender sold as a paste is Taunggyi Maukme thanaka from southern Shan State. Thanaka trees are perennials, and a tree must be at least 35 years old before it is considered mature enough to yield good-quality cuttings. Thanaka in its natural state is sold as small logs individually or in bundles, but nowadays also available as a paste or in powder form.
Thanaka cream is made by grinding the bark, wood, or roots of a thanaka tree with a small amount water on a circular stone slab called kyauk pyin which has a channel round the rim for the water to drain into.
Application, style and properties
Thanaka cream has been used by Burmese women for over 2000 years. It has a fragrant scent somewhat similar to sandalwood. The creamy paste is applied to the face in attractive designs, the most common form being a circular patch on each cheek, sometimes made stripey with the fingers known as thanaka bè gya, or patterned in the shape of a leaf, often also highlighting the bridge of the nose with it at the same time. It may be applied from head to toe (thanaka chi zoun gaung zoun). Apart from cosmetic beauty, thanaka also gives a cooling sensation and provides protection from sunburn. It is believed to help remove acne and promote smooth skin. It is also an anti-fungal. The active ingredients of thanaka are coumarin and marmesin.
In 2013, two pre-school age children from separate families in Kansas City, Missouri tested positive for dangerous levels of lead in their blood. Their elevated blood lead-levels were identified through required lead testing administered to refugees seeking resettlement in the United States. Investigators from the KCMO Health Department linked the lead poisoning to Thanaka powder at each family's residence. Sales of Thanaka at local stores and online is not highly regulated; public health officials believe the lead contamination can be caused by the tools used to grind the powder, or its containers. Public health officials recommend only using cosmetic products from a verified source; look for 1) product ingredients in a language you know and 2) a contact number on the packaging. Imported products with a U.S. distribution company are more likely to be lead-free. More details can be found in this article: http://www.kctv5.com/story/24081950/imported-makeup-gives-2-local-children-lead-poisoning
Lead poisoning remains an alarming public health problem in the United States and can cause significant and long-lasting educational and behavioral developmental disabilities. 
Market stall keeper wearing thanaka, Mandalay
A Karen child (an ethnic group in Burma and Thailand) with Thanaka on her face.
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- Thanat-kha by May May Aung
- Myanma Thanakha
- Burmese thanaka faces TrekEarth photos
- Thanaka Flickr photos