Clays, Drugs, and Human Health

Carretero, Marı́a Isabel; Gomes, Celso; Tateo, Fabio

doi:10.1016/b978-0-08-098259-5.00025-1

Cited by 86 publications

(97 citation statements)

References 141 publications

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“…Both therapeutic and cosmetic uses of clay and clay minerals (hydrous phyllosilicates) have been reported by several authors such as Bech (1987), Viseras and López-Galindo (1999), Veniale (1999), Reinbacher (2003), Gomes and Silva (2007), Carretero (2002), Carretero et al (2006Carretero et al ( , 2013, Viseras et al (2007), Gomes and Silva (2010), Rautureau et al (2010), De Vos (2010), Young (2011), Gomes (2013), Gomes et al (2013), Meijide et al (2014), Williams and Hillier (2014), Gomes et al (2015) and Mattioli et al (2016).…”

Section: Clay/clay Minerals and Human Healthmentioning

confidence: 92%

“…More recently yet, other authors such as Veniale et al (2007), Gomes and Silva (2007), Tateo et al (2006Tateo et al ( , 2009, , Viseras et al (2007), Gomes et al (2009), Rautureau et al (2010), Kikouama and Baldé (2010), Fioravanti et al (2010), De Vos (2010), Carretero et al (2006Carretero et al ( , 2013, Gomes et al (2013), Peiró and Tejero (2014), Williams and Hillier (2014) and Gomes (2015). All these articles disclose interesting information about properties, applications and functions on human health of clay, clay minerals and clay-based products.…”

Section: Environ Geochem Healthmentioning

confidence: 93%

“…Several authors have emphasized the benefits of peloid properties and peloid therapeutic functions: Veniale (1996Veniale ( , 1997Veniale ( , 1999, Carretero (2002), Carretero et al (2006Carretero et al ( , 2013 (2015), Meijide et al (2014Meijide et al ( , 2015 and Gomes (2015). Also, there is evidence of the positive effects of peloids on dermatological affections, especially on psoriasis, acne and seborrhoea, as well as on skin care functions (cleansing, degreasing, exfoliating, hydrating, tonifying and reaffirming).…”

Section: Peloids Action Function and Benefitsmentioning

confidence: 97%

See 2 more Smart Citations

Healing and edible clays: a review of basic concepts, benefits and risks

Gomes

2017

Environ Geochem Health

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The use of clay by humans for medicinal and wellness purposes is most probably as old as mankind. Within minerals, due to its ubiquitous occurrence in nature and easy availability, clay was the first to be used and is still used worldwide. Healing clays have been traditionally used by man for therapeutic, nutritional and skin care purposes, but they could impart some important health and skin care risks. For instance, clay particles could adsorb and make available for elimination or excretion any potential toxic elements or toxins being ingested or produced, but they could adsorb and make available for incorporation, through ingestion or through dermal absorption, toxic elements, e.g. heavy metals. Edible clays, a particular case of healing clays, have been traditionally used by man for nutritional and therapeutic purposes. Geophagy, the deliberate soil eating, earth eating, clay eating and pica (medical condition or eating disorder shown by individuals addicted to eat earth substances), has been observed in all parts of the world since antiquity, reflecting cultural practice, religious belief and physiological needs, be they nutritional (dietary supplementation) or as a remedy for disease. This paper pretends to review historical data, basic concepts and functions, as well as benefits and risks of the use of healing clays, in general, for therapeutic and cosmetic purposes, and of edible clays, in particular, for therapeutic purposes.

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Section: Clay/clay Minerals and Human Healthmentioning

confidence: 92%

Section: Environ Geochem Healthmentioning

confidence: 93%

Section: Peloids Action Function and Benefitsmentioning

confidence: 97%

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Healing and edible clays: a review of basic concepts, benefits and risks

Gomes

2017

Environ Geochem Health

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“…For instance, kaolinite has been reported to be a potential respiratory hazard. However, quartz, typically associated with clay minerals such as kaolinite, seems to play an overruling role in the respiratory illnesses associated with clay dust inhalation (Carretero et al, 2006). Indeed, silica dust inhalation has been shown to be fibrogenic and carcinogenic (Ding et al, 2002).…”

Section: Health Hazardmentioning

confidence: 99%

Mineralogy and physicochemical features of Saharan dust wet deposited in the Iberian Peninsula during an extreme red rain event

Rodríguez-Navarro¹,

Lorenzo²,

Elert³

2018

Preprint

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Abstract. The mineralogy and physicochemical features of Saharan dust particles help to identify source areas and determine their biogeochemical, radiative and health effects, but their characterization is challenging. Using a multianalytical approach, here we characterized with unprecedented level of detail the mineralogy and physicochemical properties of Saharan dust particles massively wet deposited (~18 g m -2 ) following an extreme "red rain" event triggered by a north African cyclone that affected the southern Iberian Peninsula during February 21-23, 2017. Abundant palygorskite and illite, 10 and relatively high carbonate contents, well-known northern and north-western Saharan dust indicators, along with low chlorite content and significant amounts of smectites and kaolinite, whose abundance increases southwards in the western Sahara, complemented by satellite imagery and back/forward trajectories, show that the most probable dust source areas were (i) south/central Algeria, north Mali and northwest Niger, and (ii) north Algeria, south Tunisia and north-west Libia.Scanning and transmission electron microscopy analyses, including Z-contrast high angle annular dark field (HAADF) 15 imaging and analytical electron microscopy (AEM) show that clay minerals include abundant structural Fe (57 % of the total Fe) and typically form nanogranular aggregates covered or interspersed with amorphous/poorly crystalline iron oxyhydroxide nanoparticles (ferrihydrite), which account for 28 % of the free Fe, the rest being goethite and hematite. These nanogranular aggregates tend to form rims lining large silicate and carbonate particles. Such internally mixed iron-containing phases are main contributors to the observed absorption of solar and thermal radiation, and along with the abundant 20 coarse/giant particles (>10 μm), strongly affect the dust direct radiative forcing. The lack of secondary sulfates in aggregates of unaltered calcite internally mixed with clays/iron-rich nanoparticles shows that iron-rich nanoparticles did not form via atmospheric (acid) processing but were already present in the dust source soils. Such iron-rich nanoparticles, in addition to iron-containing clay (nano)particles, are an important source for bioavailable (soluble) iron. The dust particles are a potential health hazard, specially the abundant and potentially carcinogenic iron-containing palygorskite fibers. Ultimately, we show 25 that different source areas are activated over large desert extensions, and large quantities of complex dust mixtures are transported thousands of kilometers and wet-deposited during such extreme events, which thwart any other Saharan dust event affecting south-western Europe. The past, present, and future trends, as well as impacts, of such extreme events must be taken into account when evaluating and modeling the manifold effects of the desert dust cycle.Atmos. Chem. Phys. Discuss., https://doi

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“…The first written instructions for the use of mud in the treatment of diseases indicating the duration of treatment and the way of application correlated with lists of pathologies were formulated by clerics and doctors from the 17th century, but their application dates back to the 12th-14th centuries (Gomes et al, Veniale et al, 2007 Peloids have a therapeutic effect due to biologically active substances, organo-mineral, iron, copper, aluminum, amino acids, carbohydrates and antibiotics, vitamins, hormones (Carretero et al, 2006;Munteanu, 2017).…”

Section: Introductionmentioning

confidence: 99%

Untitled

2016

Balneo

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The study aims to characterize Techirghiol's sapropelic mud both by determining the organic and inorganic composition of the constituent phases and by isolating some compounds of humic substances. The distribution between the solid and liquid phases of the peloid of the Ca2+, Mg2+, Fe3+cations, PO43-anion, bioactive compounds of the protein, lipid and carbohydrate classes as well as the phosphatase activity of Techirghiol sapropelic mud are analyzed. The mud is fractionated using the pH and solvent polarity variation and is spectrophotometrically characterized based on absorption in the wavelength range 340-700 nm humic acids and fulvic acids differentiated on the basis of solubility and molecular mass.

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Clays, Drugs, and Human Health

Cited by 86 publications

References 141 publications

Healing and edible clays: a review of basic concepts, benefits and risks

Healing and edible clays: a review of basic concepts, benefits and risks

Mineralogy and physicochemical features of Saharan dust wet deposited in the Iberian Peninsula during an extreme red rain event

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