The true fruit of the cashew tree is a kidney or boxing-glove shaped drupe that grows at the end of the cashew apple. The drupe develops first on the tree, and then the pedicel expands to become the cashew apple. Within the true fruit is a single seed, which is often considered a nut, in the culinary sense. 

Health benefits of Cashew nuts

• Cashews are high in calories. 100 g of nuts provide 553 calories. They packed with soluble dietary fiber, vitamins, minerals and numerous health-promoting phytochemicals that help protect from diseases and cancers.

• They are rich in “heart-friendly” monounsaturated fatty acids like oleic, and palmitoleic acids.These essential fatty acids help lower harmful LDL-cholesterol while increasing good HDL cholesterol in the blood. Research studies suggest that the Mediterranean diet which is rich in monounsaturated fatty acids contribute to preventing coronary artery disease and strokes by favoring healthy blood lipid profile.

• Cashew nuts are abundant sources of essential minerals. Manganese, potassium, copper, iron, magnesium, and selenium are especially concentrated in them. A handful of cashew nuts a day in the diet would provide enough of these minerals and may help prevent deficiency diseases. Selenium is an important micronutrient, which functions as a co-factor for antioxidant enzymes such as Glutathione peroxidases, one of the most powerful antioxidants in the body. Copper is a cofactor for many vital enzymes, including cytochrome c-oxidase and superoxide dismutase (other minerals function as co-factors for this enzyme are manganese and zinc). Zinc is a co-factor for many enzymes that regulate growth and development, gonadal function, digestion, and DNA (nucleic acid) synthesis.

• Cashews are also good in many essential vitamins such as pantothenic acid (vitamin B5), pyridoxine (vitamin B-6), riboflavin, and thiamin (vitamin B-1). 100 g nuts provide 0.147 mg or 32% of daily recommended levels of pyridoxine. Pyridoxine reduces the risk of homocystinuria, and sideroblastic anemia. Niacin helps prevent "pellagra" or dermatitis. Additionally, these vitamins are essential for the metabolism of protein, fat, and carbohydrates at the cellular level.

• Further, they also hold a small amount of 

•  an important pigment flavonoid antioxidant, which selectively absorbed into the retinal macula lutea in the eyes. It is thought to provide antioxidant and protective UV ray filtering functions and helps prevent age-related macular degeneration (ARMD) in the older adults.