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Pine nuts are the edible seeds of pines (family Pinaceae, genus Pinus). About 20 species of pine produce seeds large enough to be worth harvesting; in other pines the seeds are also edible, but are too small to be of value as a human food.
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Stone Pine cone with pine nuts – note two nuts under each cone scale
In Europe, pine nuts come from the Stone Pine (Pinus pinea), which has been cultivated for its nuts for over 6,000 years, and harvested from wild trees for far longer. The Swiss Pine (Pinus cembra) is also used to a very small extent.
In Asia, two species are widely harvested, Korean Pine (Pinus koraiensis) in northeast Asia (the most important species in international trade), and Chilgoza Pine (Pinus gerardiana) in the western Himalaya. Four other species, Siberian Pine (Pinus sibirica), Siberian Dwarf Pine (Pinus pumila), Chinese White Pine (Pinus armandii) and Lacebark Pine (Pinus bungeana), are also used to a lesser extent.
In North America, the main species are three of the pinyon pines, Colorado Pinyon (Pinus edulis), Single-leaf Pinyon (Pinus monophylla), and Mexican Pinyon (Pinus cembroides). The other eight pinyon species are used to a small extent, as are Gray Pine (Pinus sabineana), Torrey Pine (Pinus torreyana) and Sugar Pine (Pinus lambertiana). In the United States, pine nuts are mainly harvested by Native American tribes; in many areas, they have exclusive rights to the harvest.
Pine nuts contain (depending on species) between 10 to 34% of protein, with Stone Pine having the highest content. They are also a source of dietary fibre. When first extracted from the pine cone, they are covered with a hard shell (seed coat), thin in some species, thick in others. The nutrition is stored in the large female gametophytic tissue that supports the developing embryo (sporophyte) in the centre. Although a nut in the culinary sense, in the botanical sense pine nuts are seeds; being a gymnosperm, they lack a carpel (fruit) outside.
The shell must be removed before the pine nut can be eaten. Unshelled pine nuts have a long shelf life if kept dry and refrigerated (at 5 to +2 Â°C); shelled nuts (and unshelled nuts in warm conditions) deteriorate rapidly, becoming rancid within a few weeks or even days in warm humid conditions. Pine nuts are commercially available in shelled form, but due to poor storage, these rarely have a good flavour and may be already rancid at the time of purchase.
Pine nuts have been eaten in Europe and Asia since the Paleolithic period. They are frequently added to meat, fish, and vegetable dishes. In Italian they are called pinoli or (rarely) pignoli (locally also pinoccoli or pinocchi; Pinocchio means ‘pine nut’) and are an essential component of Italian pesto sauce. The pignoli cookie, an Italian specialty confection, is made of almond flour formed into a dough similar to that of a macaroon and then topped with pine nuts. Pine nuts are also featured in the salade landaise of southwestern France. Pine nut coffee, known as piÃ±Ã³n (Spanish for pine nut), is a specialty found in the southwest United States, especially New Mexico; it is typically a dark roast coffee and has a deep, nutty flavour. Pine nuts are also used in chocolates and desserts such as baklava.
Korean Pine pine nuts – unshelled, and shell, above; shelled, belowIn the United States, millions of hectares of productive pinyon pine woods have been destroyed due to conversion to grazing lands, and in China, destructive harvesting techniques (such as breaking off whole branches to harvest the cones) and the removal of trees for timber have led to losses in production capacity.
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Pine nuts can be pressed to extract pine nut oil, which is valued both for its mild, nutty flavour and its health benefits such as appetite suppression and antioxidant action. Pine nut oil also had economic importance in pre-revolution Russia
Pine nuts are excellent source of Iron,Manganese,Copper,Magnesium and high monosaturated fat, which keeps cardiovascular system healthy.It is also packed with Vitamins A,C & D. This makes it give a boost to the immune system. They contain almost three milligrams of iron in once-ounce serviing. Pine nuts are also higher in protein than most nuts & are good source of Thiamine,Potassium & Phosphorous. Pine nuts are best kept in refrigerator, in airtight containers.
The information presented herein is intended for educational purposes only. Individual results may vary, and before using any supplements, it is always advisable to consult with your own health care provider.