At least 40 mutations in the MTHFR gene have been identified in people with homocystinuria, a disorder in which the body is unable to process homocysteine and methionine properly. People with this condition often develop eye problems, abnormal blood clotting, skeletal abnormalities, and cognitive problems.
1) Refers to a flavorful coating that forms on food as it is cooked. The glaze may be the result of basting food with a liquid, such as a meat stock, during the cooking process. 2) A glaze may also refer to foods that are coated with substances to give them a more substantial coating, such as a covering of chocolate. Glazes can also be created to make food items more aesthetically pleasing such as adding an egg wash to some baked goods to produce a shiny, golden brown glaze.
1 If other glazes are used, the item must be labelled with a permanent fired decal indicating it is for decorative purposes only, and not to be used with food.  If you observe that any glaze on your piece changes color during or after contact with food or drink, do not use it with food or drink again.