Metanefrin testi için diyete üç (3) gün önceden başlanmalıdır1.
Bu süre zarfında kaçınılması gereken yiyecekler arasında kahve, çay, çikolata, vanilya, muz, portakal ve diğer narenciye meyveleri gibi kafein ve amin açısından zengin gıdalar bulunmaktadır 15.
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