While not a good tool for diagnosing asthma, peak flow, and peak flow meters are good to monitor asthma over time. You may see declines in your peak flow prior to developing significant symptoms. This will allow you to alter your treatment regimen based on your asthma care plan.
Increase your intake of calcium, which inhibits the absorption of iron in the body. Eat more milk products, green leafy vegetables, oats and cereals (check to see that these are not fortified with iron). Milk products, such as ice cream, cheese, yogurt, are rich in calcium.
There are two forms of iron found in food: heme and non-heme. Heme iron, which is in meat, fish and poultry, is absorbed two to three times more efficiently than non-heme iron. Whole grains, legumes, fruits and vegetables all contain non-heme iron. To lower levels of iron, limit the heme-containing foods you eat. Legumes and beans make good choices for alternative sources of protein because they're high in protein and the iron they contain is not easily absorbed.