Critical Review on the Presence of Phthalates in Food and Evidence of Their Biological Impact
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International Journal of Environmental Research and Public Health Review Critical Review on the Presence of Phthalates in Food and Evidence of Their Biological Impact 1, 2,3, , 2 4 Angela Giuliani y, Mariachiara Zuccarini * y, Angelo Cichelli , Haroon Khan and Marcella Reale 2,5,* 1 “G.d’Annunzio” School of Advanced Studies, “G. d’Annunzio” University of Chieti-Pescara, 66100 Chieti, Italy; [email protected] 2 Department of Medical, Oral and Biotechnological Sciences, “G. d’Annunzio” University of Chieti-Pescara, 66100 Chieti, Italy; [email protected] 3 Aging Research Center, Ce.S.I., “G. d’Annunzio” University Foundation, 66100 Chieti, Italy 4 Department of Pharmacy, Abdul Wali Khan University, Mardan 23200, Pakistan; [email protected] 5 Interuniversity Center on Interactions between Electromagnetic Fields and Biosystems, National Research Council-Institute for Electromagnetic Detection of The Environment, (ICEMB-CNR-IREA), 80124 Naples, Italy * Correspondence: [email protected] (M.Z.); [email protected] (M.R.) Angela Giuliani and Mariachiara Zuccarini contributed equally to this work. y Received: 26 June 2020; Accepted: 3 August 2020; Published: 5 August 2020 Abstract: Phthalates are a huge class of chemicals with a wide spectrum of industrial uses, from the manufacture of plastics to food contact applications, children’s toys, and medical devices. People and animals can be exposed through different routes (i.e., ingestion, inhalation, dermal, or iatrogenic exposure), as these compounds can be easily released from plastics to water, food, soil, air, making them ubiquitous environmental contaminants. In the last decades, phthalates and their metabolites have proven to be of concern, particularly in products for pregnant women or children. Moreover, many authors reported high concentrations of phthalates in soft drinks, mineral waters, wine, oil, ready-to-eat meals, and other products, as a possible consequence of their accumulation along the food production chain and their accidental release from packaging materials. However, due to their different physical and chemical properties, phthalates do not have the same human and environmental impacts and their association to several human diseases is still under debate. In this review we provide an overview of phthalate toxicity, pointing out the health and legal issues related to their occurrence in several types of food and beverage. Keywords: phthalate acid esters; food and beverage contamination; phthalate exposure and health outcomes 1. Introduction The continuous exposure to different types of chemicals present in the environment and to which humans are exposed during their daily activities may adversely affect human health, and thus represents a global issue. Phthalates (PAEs) are esters of phthalic acid widely spread in many industrial applications, being the main plasticizers used in the polymer industry since the 1930s. They are usually added to plastic materials, such as polyvinyl chloride (PVC), polyethylene terephthalate (PET), polyvinyl acetate (PVA), and polyethylene (PE), at the percentage of 10% up to 60% of PAEs by weight, in order to improve extensibility, elasticity, and workability of the polymers. PAEs are of great economic and commercial interest thanks to their diverse applications in plastic-based consumer products, such as building materials (flooring and wall coverings, and electric cables), baby toys, clothing, printing inks, packaging materials, pesticides, personal care and cosmetics, Int. J. Environ. Res. Public Health 2020, 17, 5655; doi:10.3390/ijerph17165655 www.mdpi.com/journal/ijerph Int. J. Environ. Res. Public Health 2020, 17, x 2 of 44 Int. J. Environ. Res. Public Health 2020, 17, 5655 2 of 45 Int. J. Environ. Res. Public Health 2020, 17, x 2 of 44 cosmetics, pharmaceuticals, as well as medical devices. The structure of the most commonly used Int. J. Environ. Res. Public Health 2020, 17, x 2 of 44 PAEs is shown in Table 1. pharmaceuticals,cosmetics,Int. J. Environ. pharmaceuticals, Res. Public as well Health as 2020 medical as, 17 ,well x devices. as medical The de structurevices. The of the structure most commonly of the most used commonly PAEs2 of is 44 shown used inPAEscosmetics, Table is 1shown. pharmaceuticals,Table in Table 1. Chemical 1. as wellstructure as medical of common devices. phthal Theates structure and their of main the applications.most commonly used cosmetics, pharmaceuticals, as well as medical devices. The structure of the most commonly used PAEs is shown in Table 1. PAEs is shownTable in Table 1. Chemical 1. structure of common phthalatesphthalates and their main applications. Chemical NameTable 1. Chemical structure of Structurecommon phthal ates and their main applications. Use Table 1. Chemical structure of common phthalates and their main applications. Chemical Chemical Name StructureStructure UseUse ChemicalName Name Structure Use Chemical Name Structure Use O Personal care products (e.g., Diethyl phthalate O O fragrances), coatings (e.g., O Personal care products (e.g., Diethyl phthalate PersonalPersonalpharmaceuticals), care products products (e.g., (e.g., dyes, Diethyl(DEP)Diethyl phthalate O Personalfragrances), care products coatings (e.g., (e.g., Diethyl phthalate fragrances),fragrances), pesticidescoatings coatings (e.g., (e.g., phthalate fragrances), coatings (e.g., O pharmaceuticals),pharmaceuticals), dyes, dyes, (DEP)(DEP) OO pharmaceuticals), dyes, (DEP) O pharmaceuticals),pesticides dyes, (DEP) pesticidespesticides pesticides O OO O OO O Perfumes, PVC plastics used in household products Perfumes,Perfumes,Perfumes, PVC PVC PVCplastics plastics plastics used used used Di-(2-ethylhexyl) Perfumes,in householdin household PVC plasticsproducts products used inin household household(e.g., toys, products floor products tiles and phthalate O O Di-(2-ethylhexyl)Di-(2-ethylhexyl)Di-(2-ethylhexyl) (e.g.,furniture toys, floor upholstery, tiles and cables, Di-(2-ethylhexyl) OOO O (e.g.,(e.g.,(e.g., toys, toys, toys, floor floor floortiles tiles and tiles and and phthalatephthalatephthalate O O O O furnituregarden upholstery, hoses, cables, wall (DEHP)phthalate furniturefurniturefurniture upholstery, upholstery, upholstery, cables, cables, cables, OOgardencoverings, hoses, wall and coverings,gloves), food (DEHP) OOOOgardengardengarden hoses, hoses, hoses, wall wall wall (DEHP)(DEHP)(DEHP) and gloves),packaging, food blood packaging, storage coverings,coverings,coverings, and and gloves),and gloves), gloves), food food food bloodbags, storage and medical bags, and devices packaging,packaging, blood blood storage storage packaging,medical devices blood storage bags,bags,bags, and and medicaland medical medical devices devices devices Di-isononyl Plasticizer, remaining in Di-isononylDi-isononyl Plasticizer,Plasticizer, remaining remaining in in Di-isononylphthalate Plasticizer,rubbers, inks, remaining adhesives in and Di-isononylphthalatephthalate rubbers,rubbers,Plasticizer, inks, inks, adhesives adhesives remaining and and in phthalate rubbers,sealants, inks, adhesives paints, and and phthalate sealants,rubbers,sealants, paints,inks, paints, adhesives and and and (DINP)(DINP) sealants, paints,lacquers and lacquers (DINP)(DINP) O sealants,lacquerslacquers paints, and OO (DINP) lacquers O O OO O O OO O O OO O VinylVinyl flooring, flooring, adhesives adhesives VinylVinyl flooring,flooring, adhesives and sealants, car-care Benzyl andandand sealants, sealants, car-care car-care car-care BenzylBenzyl products,Vinyl flooring, toys, food adhesives ButylphthalateBenzyl O products,products,products, toys, toys, food food food ButylphthalateButylphthalate OO packaging,and synthetic sealants, leather, car-care ButylphthalateBenzyl packaging,packaging,packaging, synthetic synthetic leather, leather, leather, industrialproducts, solvents, toys, glues, food Butylphthalate(BBP) O industrialindustrialindustrial solvents, solvents, solvents, glues, glues, glues, (BBP)(BBP) personalpackaging, care products, synthetic and leather, personalpersonalpersonal care care products, products, and and and O automotive products OO automotiveautomotiveindustrial solvents,products products glues, (BBP) O OH automotive products OO OOHH personal care products, and O automotive products O OH Int. J. Environ. Res. Public Health 2020, 17, 5655 3 of 45 Table 1. Cont. Int. J. Environ. Res. Public Health 2020, 17, x 3 of 44 Chemical Structure Use Name CelluloseCellulose acetate acetate plastics, plastics, solvent for oil-soluble dyes, Di-n-butyl solvent for oil-soluble dyes, O pesticides, personal care phthalateDi-n-butyl pesticides, personal care phthalate productsproducts (e.g., (e.g., nail nail polish polish (DBP) O andand cosmetics), cosmetics), lacquers, lacquers, (DBP) varnishes,varnishes, and and coatings coatings (e.g., (e.g., O pharmaceuticals)pharmaceuticals) O There is a mounting concern about the ability of PAEs to disrupt hormones and negatively regulateThere reproductive is a mounting apparatus concern [1]. about Moreover the ability, due of to PAEs their to environmental disrupt hormones persistence and negatively and, therefore,regulate reproductivebioaccumulation apparatus along the [1]. food Moreover, chain, duethey to are their consid environmentalered highly persistence risk pollutants and, for therefore, their negativebioaccumulation impact on along the environment the food chain, and they living are or consideredganisms. PAEs highly can risk enter pollutants food via for several their negativeroutes, i.e.,impact