18. Avoiding Nitrates and Nitrites
Nitrates and nitrites may possibly cause headaches. Consumption of or exposure to these may cause vasodilation of the blood vessels. This in turn may lead to a vascular headache. Nitrates can be found in some medications, as well as in certain chemicals that are used in food and beverages. On the other hand, nitrites are used in processed meats to preserve the red coloring, and also in other food products as preservatives. Although the amounts used are usually low, nitrite content may still trigger a headache in those who are sensitive to it. To be on the safe side, it is better to avoid nitrates and nitrites in your diet as much as you could.
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