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Particularly in the case of chronic stress, a daily intake of 2-3 g glutathione per day would be desirable via the food, if possible with intensive intake of freshly butchered liver with up to 7 g of glutathione per kg. This is hardly to be expected in our Western lifestyle and with our nutritional habits. Since the glutathione content of food decreases rapidly through processing, storage and cooking and as, in addition, particularly industrially processed foodstuffs in their turn contain radicals and chemicals – for the disposal of which the GSH potentially present in the food might need to be used –, in some particular cases this can even lead to the consequence that the glutathione intake from natural sources becomes "0".

Content of reduced glutathione in various food products

Food products                          GSH / 100 g     Reference

Asparagus (freshly cooked)

28,3 mg

Valencia 2001

Asparagus  (raw)

26 mg

Bloem 2003

Avocado

31 mg

Bloem 2003 (6)

Beef muscle meat (consumer goods)

20 mg

Belitz 2001

Beef muscle meat (freshly butchered)

25-75 mg

Uhlig 1992 (12)

Beef muscle meat (frozen, consumer goods)

17.5 mg

Valencia 2001 (4)

Brewers-yeast extract (low-impact manufacturing)

1000 mg

Reiff 1960 (10)

Broccoli (consumer goods)

14 mg

Belitz 2001; Souci 2000

Carrots (freshly cooked)

5.8 mg

Valencia 2001

Carrots (raw)

2.2 mg

Souci 2000

Cauliflower (raw)

7.4 mg

Belitz 2001; Souci 2000

Chicken

9.5 mg

Belitz 2001(5)

Green bell peppers (raw)

4.9 mg

Belitz 2001

Ham (freshly cooked)

23 mg

Souci 2000 (11); Valencia 2001

Liver (consumer goods)

120-275 mg

Bray 1994 (7); Breuille 1998 (8)

Liver (freshly butchered)

737 mg

Malmezat 1998 (9)

Orange juice (rediluted consumer goods)

4.2 mg

Valencia 2001

Oranges (consumer goods Germany)

4 mg

Belitz 2001

Oranges (fresh)

7.3 mg

Valencia 2001

Parsley (consumer goods)

12 mg

Belitz 2001; Souci 2000

Peanuts

2.1 mg

Souci 2000

Potatoes (freshly cooked)

13.6 mg

Valencia 2001

Potatoes (raw)

7.1 mg

Belitz 2001; Souci 2000

Pumpkin (raw)

5.1 mg

Souci 2000

Spinach (consumer goods)

12 mg

Belitz 2001; Souci 2000

Tomato (raw)

4.9 mg

Belitz 2001

Watermelon

28 mg

Bloem 2003

Wheat flour (consumer goods)           3 mg           Belitz 2001

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