Grapes are not only a low glycemic (GI) food they have blood sugar benefits which include better blood sugar balance, better insulin regulation and increased insulin sensitivity. Find out more about Grapes.
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Is it necessary that your foods provide you with plenty of the nutrient glutathione?

It's not mandatory to consume glutathione in the diet, even though we like that idea! Glutathione is found preformed in many foods, even though it is found in relatively small amounts. Asparagus and avocado are near the top of the vegetable list when it comes to glutathione content. However, since a healthy human body can make glutathione from its three building blocks (the amino acids glutamic acid, glycine, and cysteine), it is only necessary to eat foods that contain these three individual amino acids and a healthy body can figure out how to combine them into glutathione. Cysteine is usually considered the most important of these amino acids to obtain from the diet when it comes to formation of glutathione, and you can find this sulfur-containing amino acid in most cruciferous vegetables (like broccoli) as well as onions and garlic.

While it is true that digestive enzymes are capable of breaking proteins down into individual amino acids, they don't always do so. The body is capable of absorbing whole proteins intact, and a relatively tiny piece of protein like glutathione can also be absorbed intact. In practice, it turns out that the body doesn't often choose to absorb glutathione intact and prefers to break it down, absorb its separate amino acids, and then re-assemble them into glutathione as needed.

References

  • He M, Openo K, McCollough M. Total Equivalent of Reactive Chemicals in 142 Human Food Items Is Highly Variable Within and Between Major Food Groups. J. Nutr. 2004, 134:1114-1119. 2004.
  • Jones DP, Coates RJ, Flagg EW, et al. Glutathione in foods listed in the National Cancer Institute's Health Habits and History Food Frequency Questionnaire. Nutr Cancer. 1992;17:57-75. 1992. PMID:1574445.

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