customs broker. Person who is licensed by the local customs, after passing an examination that covers a broad range of knowledge including customs law, customs classification, customs tariff schedule, import and export regulations, shipping procedures, trade documentation, etc.
One boiled egg can reduce absorption of iron in a meal by as much as 28%. Oxalates impair the absorption of non-heme iron. Oxalates are found in foods such as spinach, kale, beets, nuts, chocolate, tea, wheat bran, rhubarb, strawberries and herbs such as oregano, basil and parsley. The presence of oxalates in spinach explains why the iron in spinach is not absorbed.
Because of this health risk with high iron intake, the Institute of Medicine has set a Tolerable Upper Intake Level, or UL, for iron. This is the highest amount of iron that can be taken daily with a low risk for developing overload. For males and females over 14 years old, the UL for iron is 45 milligrams per day.