Exploring the EMF-Melatonin Connection: A Review of the Possible Effects of 50/60-Hz Electric and Magnetic Fields on Melatonin Secretion.

International journal of occupational and environmental health · 1996 · Mixed · Insufficient evidence

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MixedInsufficient evidencePaper 5431

Study snapshot

PublicationInternational journal of occupational and environmental health · 1996

Study typereview

Reported directionMixed

Evidence ratingInsufficient

Abstract

This study analyzed the experimental data about the relationship between exposure to 50/60-Hz electric and magnetic fields (EMF) and melatonin secretion by the pineal gland. The authors report their results and discuss possible health consequences, in the light of epidemiologic data suggesting that breast neoplasms and depressive disorders might be related to EMF. The nocturnal peak of melatonin has been reported to be diminished, or time-shifted, or both, in rodents exposed to electric and/or magnetic fields. Current experimental data from primates and humans are insufficient to show that this change occurs in them. Epidemiologic studies of associations between EMF exposure and breast cancer and between EMF exposure and depressive disorders suggest that modifications of melatonin secretion could be a biologic signal of these effects. Nonetheless, changes in melatonin secretion cannot yet be considered a verified biologic explanation of any such association.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typereview

Effect directionmixed

PopulationNot supplied

Sample sizeNot supplied

ExposureELF

Evidence strengthInsufficientConfidence: 78% · Peer reviewed: yes

Main findings

Rodent studies have reported a diminished and/or time-shifted nocturnal melatonin peak with exposure to 50/60-Hz electric and/or magnetic fields. Experimental data from primates and humans are described as insufficient to show that similar changes occur in them, and melatonin changes are not considered a verified biologic explanation for reported epidemiologic associations with breast cancer or depressive disorders.

Outcomes measured

Melatonin secretion (pineal gland)
Nocturnal melatonin peak changes (diminished and/or time-shifted)
Breast neoplasms/breast cancer (epidemiologic associations discussed)
Depressive disorders (epidemiologic associations discussed)

Limitations

Review summarizes existing experimental and epidemiologic data rather than presenting new primary results
Experimental data in primates and humans are described as insufficient to demonstrate melatonin changes
Melatonin modification is not yet a verified biologic explanation for epidemiologic associations

View raw extracted JSON

{
  "study_type": "review",
  "exposure": {
    "band": "ELF",
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Melatonin secretion (pineal gland)",
    "Nocturnal melatonin peak changes (diminished and/or time-shifted)",
    "Breast neoplasms/breast cancer (epidemiologic associations discussed)",
    "Depressive disorders (epidemiologic associations discussed)"
  ],
  "main_findings": "Rodent studies have reported a diminished and/or time-shifted nocturnal melatonin peak with exposure to 50/60-Hz electric and/or magnetic fields. Experimental data from primates and humans are described as insufficient to show that similar changes occur in them, and melatonin changes are not considered a verified biologic explanation for reported epidemiologic associations with breast cancer or depressive disorders.",
  "effect_direction": "mixed",
  "limitations": [
    "Review summarizes existing experimental and epidemiologic data rather than presenting new primary results",
    "Experimental data in primates and humans are described as insufficient to demonstrate melatonin changes",
    "Melatonin modification is not yet a verified biologic explanation for epidemiologic associations"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "ELF EMF",
    "50/60-Hz",
    "electric fields",
    "magnetic fields",
    "melatonin",
    "pineal gland",
    "rodents",
    "primates",
    "humans",
    "breast cancer",
    "breast neoplasms",
    "depressive disorders"
  ],
  "suggested_hubs": [
    {
      "slug": "occupational-exposure",
      "weight": 0.55,
      "reason": "Published in an occupational and environmental health journal and discusses health consequences of 50/60-Hz field exposure."
    }
  ]
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1179/oeh.1996.2.1.37
PubMed: 9933863

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