between Toxic and Essential Metals

Overview

This source page is a mechanical bulk-ingest record for a PDF in the research-pulls corpus. It preserves source-level identity, routeable product/analyte scope, and exact extracted numeric lines for later human or fresh-context audit. It does not derive HMTc thresholds, percentiles, or brand-by-brand comparisons.

Key numbers

The worker extracted the full PDF text with layout preservation twice and compared extraction hashes before commit. The following lines are copied from numeric/table-bearing regions of the PDF and retain the source units and wording where legible:

• bodies than neurotypical controls (14–39) (Table 1). In some studies, the degree of ASD
• severity correlates with a heavy metal load. Table 1 provides examples of epidemiological
• Table 1. Overview of examples of epidemiological studies investigating the association of toxic
• 48 children with ASD 19% had a Pb level of concern
• Mercury intoxication- 106 ASD children (mean
• For example, according to a metallomics investigation, 8.5% of ASD children aged 0 to
• critical intracellular signaling ions bound by many proteins. For example, around 10% of
• urine, given that zinc levels in plasma may fluctuate by as much as 20% over one day, creating
• ASD having the greatest incidence rate of zinc insufficiency (43.5% in males and 52.5% in
• Prenatal lead exposure impacts cross-hemispheric and long-range connectivity in the human fetal brain. Neuroimage 2019, 191,

Methods (brief)

• pregnancy may no longer be detected, and no biosamples (e.g., blood, urine) from the
• data with lifestyle and social factors (12). Hair, nails, and tooth samples offer historical data
• on metal exposure, whereas blood and urine samples measure acute exposure. Particularly
• of samples have revealed that children with ASD have greater levels of toxic metals in their
• biosamples and vary in participant numbers, resulting in variable evidence strength. For a
• Sample Participants Finding in ASD Participants Reference
• Sample Participants Finding in ASD Participants Reference
• with (ASD/control) samples:
• with (ASD/control) samples: Hg↑ (hair, blood, urine), Al↑
• memory, and behavior (41,42). While the absolute levels of lead found in biosamples of
• that higher levels were found in the nail and hair but also in blood samples, the findings
• However, a comprehensive metallomics investigation utilizing hair samples from children
• biomarker of mercury poisoning, were published using blood samples from children with
• 15 exhibited elevated cadmium loads in hair samples (24). The largest body load was again
• 6 are elevated in biosamples of individuals with ASD, and their levels positively correlate
• ASD utilizes hair zinc levels; hair is the more dependable biosample for zinc than blood or
• samples of children with ASD (152).
• ratio of 207 Pb to 208 Pb in bone samples may be useful for identifying the sources of lead

Implications

This page makes the source discoverable for category-level evidence routing. Values remain source-native and should be used only with the stated matrix, species, basis, geography, and censoring context from the paper. The page does not convert total mercury to methylmercury or use total arsenic as inorganic arsenic.

Wiki pages this source may touch

• Fish — marine, predatory (tuna, swordfish, shark, king mackerel)
• Fish — marine, non-predatory (sardines, anchovies, salmon, cod)
• Mercury
• Mercury
• Cadmium
• Lead
• Arsenic
• Nickel
• Aluminum
• Chromium

Verification notes

• Identity check: DOI, raw handle, candidate cite-key, and SHA-256 were compared against existing wiki/sources/ pages before creation.
• Full-PDF read: pdftotext -layout was run on the full PDF twice; extracted text hashes matched before the page was written.
• Numeric verification: numeric/table-bearing lines were selected mechanically from the verified extraction and preserved without unit conversion or rounding.
• Brand firewall: the worker skips PDFs when extracted numeric lines appear brand/manufacturer-sensitive; this page contains category-level or species-level evidence only.
• HMTc firewall: no threshold, percentile, pass/fail, clean/dirty, or certification math is stated.

Update history

The five most recent substantive edits to this page, classified major (evidence or structure moved), correction (a published value or statement was wrong and has been fixed), or minor (narrative rewritten without changing the underlying evidence). Each description is derived from what the edit did to this page; the linked commit is the authoritative record, routine regeneration passes are excluded, and the full version history lives in git. When DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.