There are various types of fruit juices, and each has a different effect on blood sugar levels. In this article, we compare the blood sugar changes and sugar composition (ratios of fructose, glucose, and sucrose) of four types: orange juice, apple juice, grape juice, and pineapple juice, and summarize their characteristics.
Updated on 2025/03/08
Table of Contents
- Blood Sugar Comparison_1
- Blood Sugar Comparison_2
- Sugar Composition Comparison
- Summary
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Blood Sugar Comparison_1
This graph shows the blood sugar changes after drinking 200ml of each juice. The results show that different types of juices vary in how blood sugar rises, peak levels, and the way it decreases.
- Grape juice → Rises most rapidly and has the highest peak (around 180)
- Orange juice → Rises relatively gradually, suitable for sustained energy supply (peak around 160)
- Apple juice → Rises gently with fewer sharp fluctuations in blood sugar (peak around 140)
- Pineapple juice → Rises relatively quickly but also drops rapidly (peak around 160)
Blood Sugar Comparison_2
This graph shows the changes in blood sugar levels after juice consumption, with the pre-consumption level set to 0.
Sugar Composition Comparison
According to the latest "Japanese Food Composition Tables" (8th Edition, 2023), the content of fructose, glucose, sucrose, and total sugars per 100g is as follows.
Sugar Content per 100g of Each Juice (Fructose, Glucose, Sucrose, Total Sugars)
Juice | Fructose (g) | Glucose (g) | Sucrose (g) | Total Sugars (g) |
Orange Juice(100% from concentrate) | 2.1 | 1.9 | 3.7 | 7.7fooddb.mext.go.jp |
Apple Juice(100% from concentrate) | 6.2 | 2.7 | 1.4 | 10.3fooddb.mext.go.jp |
Grape Juice(100% from concentrate) | 6.1 | 5.6 | 0 (trace) | 11.7fooddb.mext.go.jp |
Pineapple Juice(100% from concentrate) | 2.8 | 2.8 | 4.3 | 9.9fooddb.mext.go.jp |
Due to these differences in sugar content, each juice affects blood sugar levels differently after consumption. Glucose directly raises blood sugar levels, while sucrose breaks down into glucose and fructose in the body. Fructose, on the other hand, is metabolized in the liver and therefore does not cause rapid increases in blood sugar levels directly.
Summary
✅ Grape Juice → High in glucose, most likely to cause rapid blood sugar increases
✅ Apple Juice → High in fructose, causes gentle and sustained blood sugar increases
✅ Orange Juice → Balanced type
✅ Pineapple Juice → Relatively high proportion of sucrose, tends to raise blood sugar levels
Based on this comparison, apple juice is the most recommended juice for those wanting to minimize blood sugar spikes. However, keep in mind that it still contains significant amounts of sugar, so it's advisable to be mindful of portion sizes.
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