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Mercury in foods and fish and selenium as a chelation agent

Identifier

013083

Type of spiritual experience

Background

In organic chemistry, a thiol  is an organosulfur compound - the word is a portmanteau of "thion" + "alcohol," with the first word deriving from Greek θεῖον ("thion") = "sulfur.".

Many thiols have strong odors resembling that of garlic and garlic contains thiols

A description of the experience

Nutr Hosp. 2014 Nov 1;30(5):969-88. doi: 10.3305/nh.2014.30.5.7727.

[Methylmercury exposure in the general population; toxicokinetics; differences by gender, nutritional and genetic factors].

[Article in Spanish]

González-Estecha M1, Bodas-Pinedo A2, Guillén-Pérez JJ3, Rubio-Herrera MÁ4, Ordóñez-Iriarte JM5, Trasobares-Iglesias EM6, Martell-Claros N7, Martínez-Álvarez JR8, Farré-Rovira R9, Herráiz-Martínez MÁ10, Martínez-Astorquiza T10, Calvo-Manuel E11, Sáinz-Martín M2, Bretón-Lesmes I4, Prieto-Menchero S12, Llorente-Ballesteros MT6, Martínez-García MJ3, Salas-Salvadó J9, Bermejo-Barrera P6, García-Donaire JA7, Cuadrado-Cenzual MÁ12, Gallardo-Pino C2, Moreno-Rojas R8, Arroyo-Fernández M13, Calle-Pascual A13.

  • 1Hospital Clínico San Carlos. Instituto de Investigación Sanitaria (IdISSC). Madrid. España.. montse@cmpx.net.
  • 2Asociación de Educación para la Salud (ADEPS)..
  • 3Sociedad Española de Sanidad Ambiental (SESA)..
  • 4Sociedad Española de Endocrinología y Nutrición (SEEN)..
  • 5Sociedad Española de Salud Pública y Administración Sanitaria (SESPAS)..
  • 6Sociedad Española de Bioquímica Clínica y Patología Molecular (SEQC)..
  • 7Sociedad Española de Hipertensión-Liga Española para la Lucha contra la Hipertensión Arterial (SEH-LELHA)..
  • 8Sociedad Española de Dietética y Ciencias de la Alimentación (SEDCA)..
  • 9Federación Española de Sociedades de Nutrición, Alimentación y Dietética (FESNAD)..
  • 10Sociedad Española de Ginecología y Obstetricia. Sección de Medicina Perinatal (SEMEPE-SEGO)..
  • 11Sociedad de Medicina Interna de Madrid- Castilla la Mancha (SOMIMACA)..
  • 12Asociación Española de Biopatología Médica (AEBM)..
  • 13Hospital Clínico San Carlos. Instituto de Investigación Sanitaria (IdISSC). Madrid. España..

Mercury is an environmental toxicant that causes numerous adverse effects on human health and natural ecosystems. The factors that determine the existance of adverse effects, as well as their severity are, among others: the chemical form of mercury (elemental, inorganic, organic), dose, age, period of exposure, pathways of exposure and environmental, nutritional and genetic factors.

In the aquatic cycle of mercury, once it has been deposited, it is transformed into methylmercury due to the action of certain sulphate-reducing bacteria, which bioaccumulates in the aquatic organisms and moves into the food chain. The methylmercury content of large, long-lived fish such as swordfish, shark, tuna or marlin, is higher.

Methylmercury binds to protein in fish and is therefore not eliminated by cleaning or cooking the fish.

Fetuses and small children are more vulnerable to the neurotoxic effects of methylmercury from the consumption of contaminated fish.

Methylmercury is absorbed in the gastrointestinal tract and crosses the blood-brain barrier and the placenta.

The intake of certain dietary components such as polyunsaturated fatty acids, selenium, fiber, thiol compounds, certain phytochemicals and other nutrients can modify methylmercury bioaccesibility and its toxicity. Apart from environmental factors, genetic factors can influence mercury toxicity and explain part of the individual vulnerability.

Copyright AULA MEDICA EDICIONES 2014. Published by AULA MEDICA. All rights reserved.

PMID:  25365001

The source of the experience

PubMed

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