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Porphyrin complexes of zinc have been known since the 1930s. [1] In 1974 ZPP was identified as a major non-heme porphyrin formed in red cells as the result of lead poisoning or iron deficiency., [8] It was already known at this time that non-heme protoporphyrin IX levels were elevated in these conditions, but prior investigators had used acidic extraction methods in their assays that converted ...
[3] [10] Blood lead levels 50 to 1,000 times higher than preindustrial levels are commonly measured in contemporary human populations around the world. [3] The National Academies evaluated this issue [12] in 1991 and confirmed that the blood lead level of the average person in the US was 300 to 500 times higher than that of pre-industrial humans.
Elevated blood lead levels (BLLs) in adults can damage the nervous, hematologic, reproductive, renal, cardiovascular, and gastrointestinal systems.. Current research continues to find harmful effects in adults at BLLs previously considered harmless, such as decreased renal function associated with BLLs at 5 micrograms per deciliter (μg/dL) and lower, and increased risk of hypertension and ...
Over 170 million U.S.-born people who were adults in 2015 were exposed to harmful levels of lead as children, a new study estimates. Researchers used blood-lead level, census and leaded gasoline ...
The study published Wednesday combined data on blood lead levels and estimates of historical lead exposure with findings from past studies, including a 2019 study of nearly 600 New Zealand ...
"Young children are particularly vulnerable to lead poisoning because they absorb 4–5 times as much ingested lead as adults from a given source." High levels of exposure can lead to brain and ...
In 2015, the US Health and Human Services (HHS), Centers for Disease Control and Prevention (CDC), and National Institute for Occupational Safety and Health (NIOSH) designated 5 μg/dL (five micrograms per deciliter) of whole blood, in a venous blood sample, as the reference blood lead level for adults. An elevated blood lead level (BLL) is ...
In addition to the dozen brands with levels above 1 ppm of lead, 18 brands of various cinnamons or spice blends contained levels of lead ranging from 0.87 ppm to 0.23 ppm, according to the report ...