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Table 1 Oxidation of Dietary Fructose, Glucose, and Other Sugars in Tracer Studies (1)

From: Fructose metabolism in humans – what isotopic tracer studies tell us

Subjects

Exercise

Hours

Sugar dosage (g)

Tracer

Oxidation

Reference

9 M

No

6

0.9 fru/kg bw

13C-fru(L1)

42.9%

[70](2)

9 F

No

6

0.9 fru/kg bw

13C-fru

43%

 

8 M + 6 F

No

6

0.75 glu/kg bw

13C-glu(L1)

24.5%

[48]

8 M + 6 F

No

6

0.75 fru/kg bw

13C-fru(L1)

30.5%

 

M + 3 F

No

6

0.5 fru/kg bw

13C-fru(L2)

56%

[49](2)

3 M + 3 F

No

6

1.0 fru/kg bw

13C-fru

59%

 

4 M + 4 F

No

3

0.9 fru/kg bw

13C-fru(L3)

38.5%

[52](2)

7 obese F

No

3

0.9 fru/kg bw

13C-fru

34.9%

 

8 type-2 (4 M)

No

3

0.9 fru/kg bw

13C-fru

31.3%

 

10 M

yes

2

0.6 malt/min

13C-glu(L4)

81.7% (0.49 g/min)

[82]

10 M

yes

2

0.3 fru + 0.6 malt/min

13C-fru(L4)

62.0% (0.18 g/min)

 

10 M

yes

2

0.5 fru + 0.6 malt/min

13C-fru

54.0% (0.27 g/min)

 

10 M

yes

2

0.7 fru + 0.6 malt/min

13C-fru

52.0% (0.36 g/min)

 

6 M

Yes

2

100 galactose

13C-galactose(L1)

23.7%

[60]

6 M

Yes

2

100 fru

13C-fru(L1)

38.8%

 

6 M

Yes

2

100 glu

13C-glu(L1)

40.5%

 

6 M

yes

2

100 fru

13C-fru(L1)

43.8%

[47]

6 M

yes

2

100 glu

13C-glu(L1)

48.1%

 

6 M

yes

2

100 fru + 120 sucr

13C-fru

42.0% (42 g)

 

6 M

yes

2

100 glu + 120 sucr

13C-glu

50.2% (50.2 g)

 

18 M

yes

2

1.33 fru/kg bw

13C-fru(L1)

36.7% (35.7 g)

[62]

18 M

yes

2

1.33 glu/kg bw

13C-glu(L1)

57.2% (56.1 g)

 

6 M

yes

2

100 fru

13C-fru(L1)

45.8%

[61](2,3)

6 M

yes

2

100 glu

13C-glu(L1)

58.3%

 

6 M

yes

2

50 fru + 50 glu

13C-fru + 13C-glu

73.6%

 

6 M

yes

3

150 fru

13C-fru(L2)

38.0%

[50]

6 M

yes

3

150 glu

13C-glu(L2)

54.0%

 

5 M

yes

2

1.33 fru/kg bw

13C-fru(L4)

51.0% (49 g)

[65]

5 M

yes

2

1.33 glu/kg bw

13C-glu(L4)

60.4% (58 g)

 

5 M3

yes

2

1.33 fru/kg bw

13C-fru

37.5% (36 g)

 

5 M3

yes

2

1.33 glu/kg bw

13C-glu

58.3% (56 g)

 

6 M

yes

2

1.33 fru/kg bw

13C-fru(L4)

54.0% (53 g)

[64](3)

6 M

yes

2

1.33 glu/kg bw

13C-glu(L4)

72.0% (70 g)

 

6 M

yes

2

100 fru

13C-fru(L4)

54%

[55]

6 M

yes

2

100 glu

13C-glu(L4)

67%

 

7 M

yes

3

140 fru

13C-fru(L4)

56%

[63](3)

7 M

yes

3

140 glu

13C-glu(L4)

75%

 

10 M

yes

2

1.0 fru/kg bw

13C-fru(L2)

43.0% (30 g)

[56]

10 M

yes

2

1.0 glu/kg bw

13C-glu(L2)

37.1% (26 g)

 

8 M

yes

2

0.5 fru + 1.0 glu/min

13C-fru + 13C-glu(L2)

72.7% (1.09 g/min)

[68](3,4)

8 M

yes

2

1.5 glu/min

13C-glu

50.7% (0.76 g/min)

 

8 M

yes

2

1.2 sucr/min

13C-sucr(L1)

78.3% (0.94 g/min)

[67](4)

8 M

yes

2

1.2 glu/min

14C-glu(L1)

58.3% (0.70 g/min)

 

8 M

yes

2

0.6 sucr + 0.6 glu/min

13C-sucr + 14C-glu

70.8% (0.85 g/min)

 

9 M

yes

2.5

1.8 glu/min

13C-glu(L2)

53.3% (0.96 g/min)

[69](4)

9 M

yes

2.5

0.6 sucr + 1.2 glu/min

13C-sucr + 13C-glu(L2)

62.2% (1.12 g/min)

 

9 M

yes

2.5

0.6 malt + 1.2 glu/min

13C-malt + 13C-glu(L2)

52.2% (0.94 g/min)

 

8 M

yes

2

1.8 glu /min

14C-glu(L1)

38.7% (0.75 g/min)

[66](4)

8 M

yes

2

0.6 fru + 1.2 glu/min

13C-fru + 14C-glu(L1)

64.4% (1.16 g/min)

 
  1. (1): hours = study monitoring hours, fru = fructose, glu = glucose, sucr = sucrose, malt = maltose; bw = body weight; M = male, F = female; type-2 = type-2 diabetes. In the reference column, (2) = with glucose infusion. (3) = non-fasting subjects. (4) = oxidation data of the 2nd hour or the last 1.5 hours. In the column of “Tracer”, superscripted L1 = labeled uniformly, L2 = naturally enriched, L3 = labeled at position 1, and L4 = 13C position not indicated.