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The fall in enzyme activity may reflect oxidative modification of the enzymes themselves, which the authors state was still under investigation.","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"nutrient_topic","value_text":"Hyperbaric oxygen research collection; topical membership is not evidence of a direct clinical effect, and a therapeutic exposure is not a dietary intake.","comparator":null,"unit":null,"notes":"","entity":{"slug":"hyperbaric-oxygen","display_name":"Hyperbaric oxygen therapy","entity_type_key":"drug"}},{"dimension":"organism","value_text":"Human","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"plain_language","value_text":"The selenium-dependent enzyme and the vitamin pools held steady while two other enzymes fell.","comparator":null,"unit":null,"notes":"","entity":null},{"dimension":"primary_references","value_text":"[hbot-p15003734] Oxidative stress and antioxidant status in patients undergoing prolonged exposure to hyperbaric oxygen. 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