Pistachio

The pistachio a member of the cashew family, is a small tree originating from Central Asia and the Middle East. The tree produces seeds that are widely consumed as food.
Pistacia vera often is confused with other species in the genus Pistacia that are also known as pistachio. These other species can be distinguished by their geographic distributions (in the wild) and their seeds which are much smaller and have a soft shell.
As of 2017, Iran accounted for over half the world’s production of pistachios.
Raw pistachios are 4% water, 45% fat, 28% carbohydrates, and 20% protein. In a 100 gram reference amount, pistachios provide 562 calories and are a rich source (20% or more of the Daily Value or DV) of protein, dietary fiber, several dietary minerals, and the B vitamins, thiamin (76% DV) and vitamin B6 (131% DV) Pistachios are a moderate source (10–19% DV) of calcium, riboflavin, vitamin B5, folate, vitamin E, and vitamin K
Relative to other tree nuts, pistachios have a lower amount of fat and calories but higher amounts of potassium, vitamin K, γ-tocopherol, and certain phytochemicals such as carotenoids, and phytosterols

In July 2003, the United States Food and Drug Administration approved the first qualified health claim specific to consumption of seeds (including pistachios) to lower the risk of heart disease: “Scientific evidence suggests but does not prove that eating 1.5 ounces (42.5 g) per day of most nuts, such as pistachios, as part of a diet low in saturated fat and cholesterol may reduce the risk of heart disease”.Although a typical serving of pistachios supplies substantial calories , their consumption in normal amounts is not associated with weight gain or obesity.