Keep a detailed chart of everything you eat, drink and are exposed to along with the time of exposure. Indicate any symptoms, like headaches, blurred vision, and so on, and the times they occur. (Note: it could take from 30 minutes to a day before you see symptoms of exposure to an allergen). After a couple of weeks, a pattern may develop; make dietary changes accordingly.
You can also use this pulse test:
- Take and record your pulse for a full minute before you get out of bed each morning. (Normal resting pulse is between 60 and 80 beats a minute.)
- Take your pulse again right before you eat any one food that you suspect is an allergen or you'd like to rule out.
- Don't eat any other foods, and take your pulse again at 30 minutes and at 60 minutes after eating the food in question. Keep a record of the foods you test.
If your pulse increases more than 10 to 15 beats or goes over 85, there is a strong possibility you are allergic to that food. (Remember that other factors can also increase your pulse.)