The pistachio is a small tree originated from Persia (Iran). An important nut is product of the tree. The nuts with a strong turpentine flavor are much smaller and have a soft shell. The fruit including a long seed, which is the eatable part, is a drupe. The splitting open is a quality that commercial cultivars differences are in how usually they split open.
In researches, pistachios importantly increasing antioxidant levels in the serum of volunteers while decreased levels of low-density lipoprotein (LDL cholesterol). Pistachios consuming as 25% of daily caloric uptake raised advantageous high-density lipoprotein (HDL cholesterol) without decreasing LDL cholesterol, and while lowering LDL oxidation. Human studies have shown that about 50 grams daily usage of pistachio nut can importantly increase plasma amount of alpha-carotene lutein, gamma-tocopherol and beta-carotene.