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One of the lesser-known of the four enzymes is GGT, or Gamma-Glutamyl Transferase

127 To date, N-acetylcysteine has been used intranasally for the treatment of non-allergic chronic rhinitis with goblet cell metaplasia in which significant reduction in neutrophils, lymphocytes, goblet cells, bacterial count, turbinate hypertrophy, nasal symptoms, and rhinorrhea have been observed

For example, taking very high doses of vitamin B6 can lead to potentially irreversible nerve damage over time, while taking large amounts of niacin typically in excess of 2 grams per day can cause liver damage ( Fat-soluble vitamins Unlike water-soluble vitamins, fat-soluble vitamins do not dissolve in water and are easily stored in your bodys tissues ( There are four fat-soluble vitamins: Vitamin A Vitamin D Vitamin E Vitamin K Given that fat-soluble vitamins can accumulate in the body, these nutrients are more likely to lead to toxicity than water-soluble vitamins