Make sure your care provider is aware of your medical history and any other drugs you may be taking
The causes are firstly Coeliac disease, where there is flattened microvilli where DAO is located, so there is a reduced ability to breakdown histamine
For example, if you have 2.5mg/mL concentration and want a 0.5mg dose: (0.5 2.5) 100 = 20 IU
Biochem J 320:100510 Chen CY, Huang YL, Lin TH (1998) Association between oxidative stress and cytokine production in nickel-treated rats
You may also take your multivitamin supplement at bedtime
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