橄欖油: 起源,成分和品種

Olive oil is a staple in kitchens around the world, prized for its versatility, flavor and many health benefits. Let’s discover all there is to know about this beloved oil:

Origin and production

Ancient roots:

Olive oil has been part of Mediterranean culture for thousands of years, with evidence of its use dating back to ancient civilizations.

reward:

Olives are usually harvested in late fall to early winter. They are harvested by hand or mechanically from olive trees.
Extraction: After harvesting, the olives are crushed into a paste and the oil is extracted mechanically or chemically. Cold pressing is a common method to preserve the flavor and nutritional value of oils.

Olives are usually harvested in late fall to early winter. They are harvested by hand or mechanically from olive trees.

Olive oil ingredients

What are the ingredients of pure olive oil? The main active ingredients of olive oil include oleic acid, phenolic components and squalene.

Main components of olive oil

  • Oleic acid (up to 83%)
  • Contains small amounts of other fatty acids, including linoleic acid (up to 21%) and palmitic acid (up to 20%)
  • Approximately 98%–99% of (Extra Virgin Olive Oil) EVOO – Extra virgin olive oil (saponifiable fraction) consists of triglycerides, most of which are MUFA (oleic acid)
  • High amounts of polyunsaturated fats (linoleic acid and alpha-linolenic acid) and small amounts of fat
  • Saturated fat content (palmitic acid 7.5%–20%, stearic acid 0.5%–5%)

Olive oil is very high in monounsaturated fat and contains moderate amounts of vitamins E and K. Extra virgin olive oil is also rich in antioxidants, some of which have powerful health benefits. In addition to its culinary applications in human nutrition, olive fruit and pressed olive oil have a wide range of therapeutic properties.

Some of the major polyphenols found in olive oil

simple phenols

  • –Tyrosol
  • –Hydroxytyrosol

Terpenes

  • –Oleuropein
  • – Luteolin

Flavonoids

  • –Apigenin
  • – Luteolin

Hydroxycinnamic acid

  • – caffeic acid
  • –Cinnamic acid
  • –ferulic acid
  • – Coumaric acid

anthocyanin

  • -anthocyanin
  • –Paeoniflorin

Flavonols

  • – Quercetin
  • –kaempferol

Flavonoid glycosides

  • - Regular

Lignans

  • – pinoresinol

Hydroxybenzoic acid

  • – vanillic acid
  • – Syringic acid

Types of olive oil

Types of olive oil

  • Extra Virgin Olive Oil (EVOO): Considered the highest quality and tastiest olive oil, EVOO is extracted from the first pressing of olives without the need for heat or the use of chemicals. It has lower acidity and a rich flavor.
  • Virgin Olive Oil: Like EVOO, virgin olive oil is extracted from first-pressed olives, but has slightly higher acidity and a milder flavor.
  • Pure Olive Oil: Also known as “regular” olive oil, this type is a blend of virgin and refined olive oils. It has a mild flavor and is suitable for cooking.
  • Light olive oil: Despite the name, "light" refers to the mild flavor of the oil rather than its calorie content. Light olive oil is refined and lacks the distinctive flavor of virgin or extra virgin olive oil.

nutrient content

Heart-healthy fats: Olive oil is primarily composed of monounsaturated fats, especially oleic acid, which has many health benefits, including lowering the risk of heart disease. Antioxidants: EVOO contains antioxidants such as polyphenols and vitamin E, which help protect cells from damage caused by free radicals. Anti-inflammatory properties: The polyphenols in olive oil have anti-inflammatory properties and may reduce the risk of chronic diseases such as cancer and Alzheimer’s disease.

cooking use

  • Cooking: Olive oil is prized for its ability to enhance the flavor of dishes and impart a rich, fruity aroma. It can be used for sautéing, frying, roasting and grilling.
  • Condiments: EVOO is often used in salad dressings, vinaigrettes, and marinades to add depth and richness to flavor.
  • The finishing touch: Drizzle extra virgin olive oil over cooked dishes, soups or bread to add a final touch of flavor and aroma.

health benefits

Heart health: Consuming olive oil as part of a Mediterranean diet may reduce the risk of heart disease and stroke.
Weight Management: Although olive oil is high in caloric density, its monounsaturated fat may promote feelings of satiety and help control appetite.
Brain Health: Some studies suggest that the antioxidants in olive oil may help prevent cognitive decline and improve brain function.

Storage and shelf life

Proper storage: To preserve its flavor and nutritional value, store olive oil in a cool, dark place away from heat and light. Avoid storing it near a stove or oven.
Shelf life: Although olive oil does not go rancid like other oils, its flavor and quality will decrease over time. Please use within 6 to 12 months after opening for best taste.

Quality and authenticity

Certifications: Look for certifications like PDO (Protected Designation of Origin) or PGI (Protected Geographical Indication), which indicate that the olive oil meets specific quality standards and comes from a designated region.
Tasting Notes: A high-quality olive oil should have a fresh, fruity aroma and a slightly peppery or bitter taste, indicating the presence of antioxidants.

sustainability and ethics

Environmental Impact: Choose olive oil from producers committed to permaculture practices such as organic farming, water conservation, and biodiversity conservation.
Fair Trade: Consider purchasing olive oil from producers who adhere to fair labor practices and provide workers with fair wages and working conditions.

cultural significance

Mediterranean Diet: Olive oil is a cornerstone of the Mediterranean diet, a dietary pattern associated with many health benefits and longevity.
Culinary Tradition: Olive oil plays a central role in the cuisine of Mediterranean countries, where it is used in a variety of dishes, from simple salads to elaborate feasts.

in conclusion

Olive oil is more than just a cooking oil, it's a symbol of health, flavor and tradition. Whether drizzled on salads, used to sauté vegetables, or served with freshly baked bread, olive oil adds a touch of Mediterranean magic to any dish. You can fully appreciate the richness of this ancient and beloved ingredient by learning about its varieties, culinary uses, health benefits, and cultural significance.

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