Black, green, oolong, and white tea come from the Camellia sinensis plant — also known as the tea plant. The leaf extract is the oil from its leaves (1Trusted Source).
 
Camellia sinensis or tea leaf extract has gained popularity given the multiple health benefits of tea, especially those of green tea.
 
The extract provides the plant’s beneficial compounds in a concentrated form, which you can make at home or buy as a supplement.
 
This article takes a closer look at Camellia sinensis leaf extract, its health effects, and some of its common uses.
 
Main compounds: 
- Catechins
- Caffeine
- L-theanine 
- Also containes B vitamins, lipids such as linoleic and alpha-linolenic acids, and trace minerals, including magnesium, calcium, iron, zinc, and selenium