為什麼升糖指數對健康很重要?

Why do people care about the glycemic index?

What is the glycemic index and why it is important

When making smart food choices, consider calories and carbs, fast foods and fats, and more. There is one more item you should pay attention to: the glycemic index (GI). GI was originally designed for people with diabetes, but it can be useful for all of us. GI is a measure of the quantity of afood - the amount that is likely to increase blood sugar. When we eat, our bodies convert digestible carbohydrates in food into glucose. Glucose provides energy to your cells and tells your pancreas to produce insulin, which helps your cells absorb glucose. Depending on different foods, you digest and convert their carbohydrates at different rates. The lower the GI of a particular food, the slower you digest it, gradually increasing your blood sugar and insulin.

Why a high glycemic index is bad for your health

The higher the GI, the faster blood sugar rises , This is bad because eating foods that raise blood sugar quickly will trigger the rapid release of insulin. This causes your blood sugar to drop rapidly, leading to hunger, lethargy, and the desire to eat again. Research shows that if this goes on for several years, your post-meal blood sugar will be higher and your insulin secretion will be higher. This can lead to obesity, irreversible type 2 diabetes, heart disease and gallbladder disease. How is the glycemic index measured and what are its levels?

The GI rating of foods is 0-100, Here are some foods and their relative GI:

  • Low GI – Under 55 (100% stone ground whole wheat, sweet potatoes, peas, other non-starchy vegetables and most fruits)
  • Medium GI – 56-99 (whole wheat and rye bread, quick oats and brown rice)
  • High GI – 70 or higher (white bread, corn chips, russet potatoes, melon and pineapple)

Generally, the more cooked or processed a food is, or the more mature it is, the higher its GI.

Gluten-freediet and paleo diet and glycemic index

Paleo diet (Paleo diet) - mainly fruits, vegetables and meats - tend to have a lower GI if consumed in the most unprocessed form possible (whole grains, cooked barley, whole wheat Bread), gluten-containing foods (wheat, rye and barley) have a lower GI. Gluten-free foods made from rice or potato flour have a higher GI than wheat products. If you don't eat gluten, choose whole grains such as oatmeal and quinoa, which have a relatively low GI. However, just because a food has a low GI does not mean it is healthier. Some low-GI foods, such as ice cream and chocolate cake with frosting, are high in sugar and/or bad fats.

What are the limitations of the glycemic index

As ahealthy diet that relies solely on the glycemic index , you can: p>

  • Combine foods: You can start with a high GI baked potato but add margarine on top and lower the GI. Mixing foods together changes the way you digest them, which overall changes their glycemic index.
  • Sizing: GI is based on 50 grams. With some foods, this is a lot. In this unit of measurement, watermelon and donuts have the same GI. But when you sit down to eat them, they really aren't. A cup of watermelon contains 7 grams of carbohydrates (GI 72), while a piece of chocolate cake with frosting has 52 grams (GI 38).
  • Types and Total Carbohydrates: The glycemic index only represents individual foods and does not represent the total amount of a meal.

What is glycemic load and why is it important

LikeGI, Glycemic load (GL) affects glucose and insulin, but GL not only considers the GI of a single food, but also Itscommon portion sizes of food. The so-called dietary GL refers to the total amount of GL consumed in a meal.

  • Low dietary GL – 10 or less
  • Medium Diet GL – 11-19
  • High dietary GL – 20 or higher

For example, the watermelon mentioned above has a GL of 7, while the chocolate cake with frosting has a GL of 12.5. Clearly, watermelon is healthier, but these numbers are not the same for everyone - we are all unique, A recent Israeli study published in the scientific journal Cell The blood sugar levels after meals were studied in 800 people over the same week. It found that everyone metabolizes meals differently. This is because their age, BMI (body mass index) and other factors have different effects on their blood sugar levels. This study shows that people need to develop personalized eating plans.

Glycemic Index and Glycemic Load DietConclusions

Compared to the GI and GL food lists, it is actually best to eat a balanced diet that includes fresh fruits and vegetables, whole grains, legumes, fish, and small amounts of red meat and poultry. And good fats. Eat less foods containing simple carbohydrates, but don't miss foods rich in vitamins, minerals and fiber. Watch your portion sizes. Foods with low GI and GL should be chosen frequently. Eat healthy and in moderation, and you can't go wrong in the general direction.

Review

All comments are moderated before being published

HealthyPIG Magazine

View all
無人機醫療配送:低空經濟下的香港新契機

無人機醫療配送:低空經濟下的香港新契機

  無人機醫療配送:低空經濟下的香港新契機 —— 從健康、醫療金融到商業模式的全球比較與啟示 在香港「低空經濟」監管沙盒下,無人機由數碼港跨海至長洲醫院,約 12 公里航線僅需 18–20 分鐘,相比傳統 45–65 分鐘大幅提速。本文聚焦醫療價值、醫療金融回報與商...
醫管局普通科門診改名「家庭醫學門診」——香港基層醫療新里程?

醫管局普通科門診改名「家庭醫學門診」——香港基層醫療新里程?

  基層醫療 家庭醫學 健康政策 醫管局普通科門診改名「家庭醫學門診」:利與弊、國際比較與香港基層醫療的下一步 醫務衞生局宣佈由 2025 年 10 月 11 日起,將「普通科門診」與「家庭醫學專科門診」統一命名為「家庭醫學門診服務」,74 間普通科門診...
基孔肯雅熱:被伊蚊叮咬後的劇痛病毒 — 病毒、傳播、症狀與防治全解析

基孔肯雅熱:被伊蚊叮咬後的劇痛病毒 — 病毒、傳播、症狀與防治全解析

什麼是基孔肯雅熱? 基孔肯雅熱(Chikungunya Fever)是一種由**基孔肯雅病毒(Chikungunya virus, CHIKV)**引起的急性傳染病,屬於 Togaviridae 家族 Alphavirus 屬。這種病毒最早於 1952 年在坦桑尼亞被發現,其名稱來自當地馬孔德...
登革熱:全球爆發中的熱帶威脅與防護全解析

登革熱:全球爆發中的熱帶威脅與防護全解析

登革熱係乜嘢? 登革熱(Dengue fever)係一種由登革熱病毒(Dengue virus)引起嘅急性傳染病,主要經由伊蚊(Aedes mosquito)叮咬傳播,特別係白紋伊蚊(Aedes albopictus)同埃及伊蚊(Aedes aegypti)。呢啲蚊喺日間最活躍,因此唔似瘧疾嗰...
流感點樣會引致腦病變、心肌炎同休克?——從「感冒」變成致命風暴

流感點樣會引致腦病變、心肌炎同休克?——從「感冒」變成致命風暴

近排有新聞報導,一名原本健康嘅中學生感染乙型流感(Influenza B)之後,出現腦病變、心肌炎同休克,情況危殆。好多家長都會問:「流感唔就係普通感冒?點解可以嚴重到影響腦同心臟?」其實,流感背後嘅機制比我哋想像中複雜得多。 一、流感病毒唔止攻擊呼吸道 流感病毒(包括甲型同乙型)主要透過飛...
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...