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.

Review

All comments are moderated before being published

HealthyPIG Magazine

View all
牛骨湯食譜大全|Instant Pot 壓力煲 & 傳統老火湯版本

牛骨湯食譜大全|Instant Pot 壓力煲 & 傳統老火湯版本

牛骨湯食譜係香港家庭常見嘅煲湯之一,牛骨湯香濃滋補,配合中藥材更具養生功效。本文介紹肉骨類選擇、牛骨湯建議配搭、常見中藥材分類,以及Instant Pot壓力煲與傳統老火湯版本食譜,並引用科學研究支持。
澳洲飲用水發現「食腦變形蟲」:全球風險與地區對策(含各國/各州實用指南)

澳洲飲用水發現「食腦變形蟲」:全球風險與地區對策(含各國/各州實用指南)

澳洲飲用水發現「食腦變形蟲」:全球風險與地區對策(含各國/各州實用指南) 澳洲飲用水發現「食腦變形蟲」:全球風險與地區對策(含各國/各州實用指南) 重點:事件本身不代表飲水會感染;主要風險來自水經鼻腔進入。 目錄 ...
如何判斷雞翅是否變壞?

如何判斷雞翅是否變壞?

重點摘要 雞翅會變質嗎? 如何判斷雞翅是否變壞? 過期雞翅還能食嗎? 雞翅可存放多久? 如何儲存雞翅? 雞翅可以冷凍嗎? 結論 雞翅會變質嗎? 會。皮脂較多、表面不潔或溫度過高時,細菌繁殖更快。 如何判斷雞翅是否變壞? 外觀:皮色發黃、出黑斑或血水。 觸感:表面黏滑、軟爛。 氣...
如何判斷雞蛋是否變壞?

如何判斷雞蛋是否變壞?

重點摘要 雞蛋會變質嗎? 如何判斷雞蛋是否變壞? 過期雞蛋還能食嗎? 雞蛋可存放多久? 如何儲存雞蛋? 雞蛋可以冷凍嗎? 結論 雞蛋會變質嗎? 會。殼面有微孔,溫差及濕度變化會令細菌入侵。 如何判斷雞蛋是否變壞? 水測:沉底=較新鮮;浮起=多半變壞。 打開觀察:蛋白渾濁水樣、蛋黃...
如何判斷羊肉是否變壞?

如何判斷羊肉是否變壞?

重點摘要 羊肉會變質嗎? 如何判斷羊肉是否變壞? 過期羊肉還能食嗎? 羊肉可存放多久? 如何儲存羊肉? 羊肉可以冷凍嗎? 結論 羊肉會變質嗎? 會。脂肪多而易氧化,處理或存放唔好就會變壞。 如何判斷羊肉是否變壞? 顏色:紅轉黑,或出現綠斑。 脂肪:由白轉黃兼有酸味。 氣味:由輕...
如何判斷豬肉是否變壞?

如何判斷豬肉是否變壞?

重點摘要 豬肉會變質嗎? 如何判斷豬肉是否變壞? 過期豬肉還能食嗎? 豬肉可存放多久? 如何儲存豬肉? 豬肉可以冷凍嗎? 結論 豬肉會變質嗎? 會。豬肉表面水活度高,加上處理不潔或溫度過高,容易腐敗。 如何判斷豬肉是否變壞? 顏色:粉紅轉灰、發綠或出斑。 氣味:酸臭、腥臭味濃 ...
如何判斷牛肉是否變壞?

如何判斷牛肉是否變壞?

重點摘要 牛肉會變質嗎? 如何判斷牛肉是否變壞? 過期牛肉還能食嗎? 牛肉可存放多久? 如何儲存牛肉? 牛肉可以冷凍嗎? 結論 牛肉會變質嗎? 會。牛肉含高蛋白同水分,若溫度控制或衛生不當,細菌會快速繁殖,導致變壞。 如何判斷牛肉是否變壞? 顏色:鮮紅轉深褐甚至發黑;脂肪變黃。 ...
成年後懷疑自己有注意力不足過動症(ADHD),應該接受診斷嗎?

成年後懷疑自己有注意力不足過動症(ADHD),應該接受診斷嗎?

在過去,注意力不足過動症(Attention-Deficit/Hyperactivity Disorder, ADHD)多被視為「小孩的病」,很多成年人小時候從未被評估或診斷。直到近年社會對心理健康重視度提升,許多成人才開始懷疑,自己長期以來的專注困難、健忘、衝動或時間管理不良,可能與 ADHD 有關。這種「晚發現」的情況相當普遍,也引發了問題:成年後是否值得接受 ADHD 診斷?

哪些職業對健康影響最大?科學與現實的分析

哪些職業對健康影響最大?科學與現實的分析

在現代社會中,工作佔據了人們生命中相當大的一部分。然而,不同職業對健康的風險並不相同。一些工作性質或環境,會顯著增加慢性病、心理壓力、甚至縮短壽命的風險。以下從科學研究與醫學角度,探討幾類對健康損害較大的職業,並附上相關統計數據。