Bibliography Tag: dietary risk

Bibliography Index

Kougias et al., 2020

Kougias, D. G., Miller, E., McEwen, A., Reamer, H., Kovochich, M., & Pierce, J.; “Risk Assessment of Glyphosate Exposures from Pilot Study with Simulated Heavy Residential Consumer Application of Roundup((R)) using a Margin of Safety (MOS) Approach;” Risk Analysis, 2020; DOI: 10.1111/risa.13646.

ABSTRACT:

Due to the widespread application of glyphosate, a nonselective herbicide, to a variety of resistant food crops, the general population is exposed to glyphosate through dietary intake. Despite this, dietary exposures to glyphosate are considered low in comparison to application-related exposures. Although previous studies have evaluated exposure to horticultural and agricultural workers, to date only one study, which we recently conducted, has characterized exposure to glyphosate in consumers following heavy residential application of a glyphosate-containing herbicide in a residential yard and garden setting. In this previous study, we demonstrated that urinary glyphosate concentrations in these applicators were similar to or in some circumstances greater than those in occupational applicators, likely due to the nature of the simulation study, which ensured a heavy application protocol. However, it is unknown whether these urinary glyphosate concentrations in consumer applicators correspond to internal doses that may be of concern. Therefore, the purpose of this study is to provide a comprehensive risk assessment of glyphosate exposure in consumer applicators using a margin of safety approach. Here, we incorporated data collected from multiple spot urine samples across time from our previous study that assessed consumer exposure to glyphosate from Roundup((R)) application. Estimated internal doses, even with the use of conservative assumptions across unique approaches, were below internal doses estimated from established health-based guidance values. Overall, this study demonstrates that glyphosate exposure from even heavy consumer application of a commercially available glyphosate-containing herbicide does not appear to be a health concern. FULL TEXT

Reeves et al., 2019

Reeves, W. R., McGuire, M. K., Stokes, M., & Vicini, J. L.; “Assessing the Safety of Pesticides in Food: How Current Regulations Protect Human Health;” Advances in Nutrition, 2019, 10(1), 80-88; DOI: 10.1093/advances/nmy061.

ABSTRACT:

Understanding the magnitude and impact of dietary pesticide exposures is a concern for some consumers. However, the ability of consumers to obtain and understand state-of-the-science information about how pesticides are regulated and how dietary exposure limits are set can be limited by the complicated nature of the regulations coupled with an abundance of sources seeking to cast doubt on the reliability of those regulations. Indeed, these regulations are sometimes not well understood within health care professions. As such, the objective of this review is to provide a historical perspective as to how modern pesticides were developed, current trends in pesticide use and regulation, and measures taken to reduce the risk of pesticide use to the consumer. Throughout the review, we provide specific examples for some of the concepts as they apply to glyphosate-a pesticide commonly used by both farmers and consumers. In addition, we describe current efforts to monitor pesticide use. We are confident that this succinct, yet thorough, review of this topic will be of interest to myriad researchers, public health experts, and health practitioners as they help communicate information about making healthful and sustainable food choices to the public. FULL TEXT

Berkowitz et al., 2004

Berkowitz, G. S., Wetmur, J. G., Birman-Deych, E., Obel, J., Lapinski, R. H., Godbold, J. H., Holzman, I. R., & Wolff, M. S.; “In utero pesticide exposure, maternal paraoxonase activity, and head circumference;” Environmental Health Perspectives, 2004, 112(3), 388-391; DOI: 10.1289/ehp.6414.

ABSTRACT:

Although the use of pesticides in inner-city homes of the United States is of considerable magnitude, little is known about the potentially adverse health effects of such exposure. Recent animal data suggest that exposure to pesticides during pregnancy and early life may impair growth and neurodevelopment in the offspring. To investigate the relationship among prenatal pesticide exposure, paraoxonase (PON1) polymorphisms and enzyme activity, and infant growth and neurodevelopment, we are conducting a prospective, multiethnic cohort study of mothers and infants delivered at Mount Sinai Hospital in New York City. In this report we evaluate the effects of pesticide exposure on birth weight, length, head circumference, and gestational age among 404 births between May 1998 and May 2002. Pesticide exposure was assessed by a prenatal questionnaire administered to the mothers during the early third trimester as well as by analysis of maternal urinary pentachlorophenol levels and maternal metabolites of chlorpyrifos and pyrethroids. Neither the questionnaire data nor the pesticide metabolite levels were associated with any of the fetal growth indices or gestational age. However, when the level of maternal PON1 activity was taken into account, maternal levels of chlorpyrifos above the limit of detection coupled with low maternal PON1 activity were associated with a significant but small reduction in head circumference. In addition, maternal PON1 levels alone, but not PON1 genetic polymorphisms, were associated with reduced head size. Because small head size has been found to be predictive of subsequent cognitive ability, these data suggest that chlorpyrifos may have a detrimental effect on fetal neurodevelopment among mothers who exhibit low PON1 activity. FULL TEXT

Stephenson and Harris, 2016

Stephenson, C. L., & Harris, C. A.; “An assessment of dietary exposure to glyphosate using refined deterministic and probabilistic methods;” Food and Chemical Toxicology, 2016, 95, 28-41; DOI: 10.1016/j.fct.2016.06.026.

ABSTRACT:

Glyphosate is a herbicide used to control broad-leaved weeds. Some uses of glyphosate in crop production can lead to residues of the active substance and related metabolites in food. This paper uses data on residue levels, processing information and consumption patterns, to assess theoretical lifetime dietary exposure to glyphosate. Initial estimates were made assuming exposure to the highest permitted residue levels in foods. These intakes were then refined using median residue levels from trials, processing information, and monitoring data to achieve a more realistic estimate of exposure. Estimates were made using deterministic and probabilistic methods. Exposures were compared to the acceptable daily intake (ADI)-the amount of a substance that can be consumed daily without an appreciable health risk. Refined deterministic intakes for all consumers were at or below 2.1% of the ADI. Variations were due to cultural differences in consumption patterns and the level of aggregation of the dietary information in calculation models, which allows refinements for processing. Probabilistic exposure estimates ranged from 0.03% to 0.90% of the ADI, depending on whether optimistic or pessimistic assumptions were made in the calculations. Additional refinements would be possible if further data on processing and from residues monitoring programmes were available. FULL TEXT

Larsson et al., 2017

Larsson, M. O., Nielsen, V. S., Brandt, C. O., Bjerre, N., Laporte, F., & Cedergreen, N.; “Quantifying dietary exposure to pesticide residues using spraying journal data;” Food and Chemical Toxicology, 2017, 105, 407-428; DOI: 10.1016/j.fct.2017.05.014.

ABSTRACT:

Relatively few studies are available on the combined risk of realistic dietary pesticide exposure. Despite available studies showing low risk, public concern remains. Recent methods used to estimate realistic exposure levels have a number of drawbacks, and better methods are needed. Using a novel approach, we estimated the combined exposure in the Danish population, resulting from pesticide usage in Danish agriculture. The complete Danish spraying journal data from 2014, and supervised trial residue levels reported by EFSA, were used in combination, generating residue estimates in 25 crops. Cumulative risk assessments were made for six typical Danish consumer diets. In terms of intake of cereals, sugar, fruits and vegetables, the 25 crops included accounted 70% of the diets of Danish consumers. The Hazard Index (HI) method was used to assess the consumer risk. Despite the conservative (cautious) approach, low HI values where obtained. Highest HI was 14% of the Acceptable Daily Intake (ADI) for Children. The main advantages of the new exposure estimation method are 1) comprehensive use data not relying on random samples, 2) coverage of all pesticides used, and 3) more precise estimates of residues that are below the standard reporting limits in the national monitoring program. FULL TEXT

Sieke et al., 2018

Sieke, C., Michalski, B., & Kuhl, T.; “Probabilistic dietary risk assessment of pesticide residues in foods for the German population based on food monitoring data from 2009 to 2014;” Journal of Exposure Analysis and Environmental Epidemiology, 2018, 28(1), 46-54; DOI: 10.1038/jes.2017.7.

ABSTRACT:

Dietary risks for the German population owing to pesticide residues in foods were assessed based on food monitoring data, consumption surveys for children and adults and compound specific toxicological reference values or general thresholds of toxicological concern. A tiered probabilistic modelling was conducted to screen 700 pesticides for significant long- and short-term dietary exposures. Especially for the short-term dietary exposure, the probabilistic methodology used allows simultaneous consideration of the complete daily consumption, whereas most regulatory bodies still rely on single commodity approaches. After screening, refined exposure assessments were conducted for 19 compounds under consideration of conversion factors for toxicologically relevant metabolites, processing information, experimentally derived variability factors and the edible portion for each food item. In total, for 693 compounds the dietary exposure was unlikely to present a chronic or acute public health concern for the German population. In contrast, the refined assessments indicate that the short-term dietary exposure for chlorpyrifos and the cumulative short-term dietary exposure for dimethoate and omethoate may present a public health concern. For copper, owing to exposure assessment limitations, as well as for dimethylvinphos, halfenprox and tricyclazole, which exceeded the thresholds of toxicological concern, the dietary risk assessment remained inconclusive. FULL TEXT

 

Nougadere et al., 2020

Nougadere, A., Sirot, V., Cravedi, J. P., Vasseur, P., Feidt, C., Fussell, R. J., Hu, R., Leblanc, J. C., Jean, J., Riviere, G., Sarda, X., Merlo, M., & Hulin, M.; “Dietary exposure to pesticide residues and associated health risks in infants and young children – Results of the French infant total diet study;” Environment International, 2020, 137, 105529; DOI: 10.1016/j.envint.2020.105529.

ABSTRACT:

A total diet study (TDS) was undertaken to estimate the chronic dietary exposure to pesticide residues and health risks for the French infants and young children below 3 years old. As a whole, 516 pesticides and metabolites were analysed in 309 food composite samples including 219 manufactured baby foods and 90 common foods, which cover 97% of infants and young children’s diet. These composite samples were prepared using 5,484 food products purchased during all seasons from 2011 to 2012 and processed as consumed. Pesticide residues were detected in 67% of the samples and quantified in 27% of the baby food samples and in 60% of the common foods. Seventy-eight different pesticides were detected and 37 of these quantified at levels ranging from 0.02 to 594 microg/kg. The most frequently detected pesticides (greater than 5% samples) were (1) the fungicides 2-phenylphenol, azoxystrobin, boscalid, captan and its metabolite tetrahydrophthalimide, carbendazim, cyprodinil, difenoconazole, dodine, imazalil, metalaxyl, tebuconazole, thiabendazole, (2) the insecticides acetamiprid, pirimiphos-methyl and thiacloprid, (3) the herbicide metribuzin and (4) the synergist piperonyl butoxide. Dietary intakes were estimated for each of the 705 individuals studied and for 431 pesticides incl. 281 with a toxicological reference value (TRV). In the lower-bound scenario, which tends to underestimate the exposure, the TRV were never exceeded. In the upper-bound scenario that overestimates exposure, the estimated intakes exceeded the TRV for dieldrin and lindane (two persistent organic pollutants) and propylene thiourea, a metabolite of propineb. For these three substances, more sensitive analyses are needed to refine the assessment. For 17 other detected and/or prioritised pesticides, the risk could not be characterised due to the lack of a valid TRV, of certain food analyses or the absence of analytical standards for their metabolites.  FULL TEXT

Chiu, 2017

Chiu, Y. H.,”Pesticide Residues in Fruits and Vegetables: Assessment and Their Associations With Reproductive Health Outcomes;” Dissertation at Harvard Universiry, (Doctor of Science in Nutrition and Epidemiology); 2017.

ABSTRACT:

According to the Dietary Guideline, consumption of fruits and vegetables (FVs) are recommended throughout the lifespan, including during pregnancy. FVs, on the other hand, can serve as a vehicle of exposure to pesticide residues. In the US, Environmental Protection Agency (EPA) is responsible for regulating pesticides under the Federal Insecticide, Fungicide, and Rodenticide Act and the Food Quality Protection Act. While majority of the produce sampled through the US Department of Agriculture had residues below the EPA limits, there is a growing concern whether chronic exposure to these pesticide residues may have adverse health effects, especially among susceptible populations such as pregnant women. Yet, such research is scarce. This dissertation focuses on the assessment of pesticide residues in FVs and evaluates their associations with pregnancy outcomes.

We previously have developed the Pesticide Residue Burden Score (PRBS) based on selfreported diet and national surveillance data on food pesticide residues to characterize dietary exposure over the past year. In Chapter 1, we evaluated the association of the PRBS with urinary pesticide metabolites in the Environment and Reproductive Health (EARTH) Study. We found intake of high pesticide residues FVs was positively associated with urinary concentrations of pesticide biomarkers, suggesting that PRBS can characterize dietary exposure to select pesticides.

In Chapter 2, we assessed the relation between preconception intake of high and low FVs and assisted reproductive technology outcomes in EARTH study. We found that intake of high pesticide residues FVs was associated with lower probability of clinical pregnancy and live birth, while intake of low pesticide residue FVs had the opposite relations among women undergoing infertility treatment. This is the first report of such relation in humans.

In Chapter 3, we examine the association between maternal intake of high and low pesticide residue FVs with birth outcomes in a pre-birth cohort. We found that maternal intake of high pesticide residue FVs during the first trimester was associated with higher risks of small-for-gestational-age among white women, while these exposures was associated with large-for-gestational-age among nonwhite women.

In conclusion, this work demonstrated the usefulness of PRBS in assessing pesticide residue intake through FVs. Using this method, these studies suggest exposure to pesticide residues may adversely affect pregnancy and birth outcomes.

FULL TEXT

Chiu et al., 2015

Chiu, Y. H., Afeiche, M. C., Gaskins, a. J., Williams, P. L., Petrozza, J. C., Tanrikut, C., Hauser, R., & Chavarro, J. E.; “Fruit and vegetable intake and their pesticide residues in relation to semen quality among men from a fertility clinic;” Human Reproduction, 2015, 0, 1-10; DOI: 10.1093/humrep/dev064.

ABSTRACT:

STUDY QUESTION: Is consumption of fruits and vegetables with high levels of pesticide residues associated with lower semen quality?
Summary Answer: Consumption of fruits and vegetables with high levels of pesticide residues was associated with a lower total sperm count and a lower percentage of morphologically normal sperm among men presenting to a fertility clinic.

WHAT IS KNOWN ALREADY: Occupational and environmental exposure to pesticides is associated with lower semen quality. Whether the same is true for exposure through diet is unknown.

STUDY DESIGN, SIZE, DURATION: Men enrolled in the Environment and Reproductive Health (EARTH) Study, an ongoing prospective cohort at an academic medical fertility center. Male partners (n = 155) in subfertile couples provided 338 semen samples during 2007–2012.

PARTICIPANTS/MATERIALS, SETTING, METHODS: Semen samples were collected over an 18-month period following diet assessment. Sperm concentration and motility were evaluated by computer-aided semen analysis (CASA). Fruits and vegetables were categorized as containing high or low-to-moderate pesticide residues based on data from the annual United States Department of Agriculture Pesticide Data Program. Linear mixed models were used to analyze the association of fruit and vegetable intake with sperm parameters accounting for within-person correlations across repeat samples while adjusting for potential confounders.

MAIN RESULTS AND ROLE OF CHANCE: Total fruit and vegetable intake was unrelated to semen quality parameters. High pesticide residue fruit and vegetable intake, however, was associated with poorer semen quality. On average, men in highest quartile of high pesticide residue fruit and vegetable intake (≥1.5 servings/day) had 49% (95% confidence interval (CI): 31%, 63%) lower total sperm count and 32% (95% CI: 7%, 58%) lower percentage of morphologically normal sperm than men in the lowest quartile of intake (,0.5 servings/day) (P, trend ¼ 0.003 and 0.02, respectively). Low-to-moderate pesticide residue fruit and vegetable intake was associated with a higher percentage of morphologically normal sperm (P, trend ¼ 0.04).

LIMITATIONS, REASONS FOR CAUTION: Surveillance data, rather than individual pesticide assessment,was used to assess the pesticide residue status of fruits and vegetables. CASA is a useful method for clinical evaluation but may be considered less favorable for accurate semen analysis in the research setting. Owing to the observational nature of the study, confirmation is required by interventional studies as well.

WIDER IMPLICATIONS OF THE FINDINGS: To our knowledge, this is the first report on the consumption of fruits and vegetables with high levels of pesticide residue in relation to semen quality. Further confirmation of these findings is warranted.

FULL TEXT

Curl et al., 2015

Curl, C. L., Beresford, S. A., Fenske, R. A., Fitzpatrick, A. L., Lu, C., Nettleton, J. A., & Kaufman, J. D.; “Estimating pesticide exposure from dietary intake and organic food choices: the Multi-Ethnic Study of Atherosclerosis (MESA);” Environmental Health Perspectives, 2015, 123(5), 475-483; DOI: 10.1289/ehp.1408197.

ABSTRACT:

BACKGROUND: Organophosphate pesticide (OP) exposure to the U.S. population is dominated by dietary intake. The magnitude of exposure from diet depends partly on personal decisions such as which foods to eat and whether to choose organic food. Most studies of OP exposure rely on urinary biomarkers, which are limited by short half-lives and often lack specificity to parent compounds. A reliable means of estimating long-term dietary exposure to individual OPs is needed to assess the potential relationship with adverse health effects.

OBJECTIVES: We assessed long-term dietary exposure to 14 OPs among 4,466 participants in the Multi-Ethnic Study of Atherosclerosis, and examined the influence of organic produce consumption on this exposure.

METHODS: Individual-level exposure was estimated by combining information on typical intake of specific food items with average OP residue levels on those items. In an analysis restricted to a subset of participants who reported rarely or never eating organic produce (“conventional consumers”), we assessed urinary dialkylphosphate (DAP) levels across tertiles of estimated exposure (n = 480). In a second analysis, we compared DAP levels across subgroups with differing self-reported organic produce consumption habits (n = 240).

RESULTS: Among conventional consumers, increasing tertile of estimated dietary OP exposure was associated with higher DAP concentrations (p < 0.05). DAP concentrations were also significantly lower in groups reporting more frequent consumption of organic produce (p < 0.02).

CONCLUSIONS: Long-term dietary exposure to OPs was estimated from dietary intake data, and estimates were consistent with DAP measurements. More frequent consumption of organic produce was associated with lower DAPs.

FULL TEXT

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